5 Colo. Code Regs. § 1002-93.3

Current through Register Vol. 47, No. 11, June 10, 2024

Section 5 CCR 1002-93.3 - Waterbodies that are Impaired or Identified for Monitoring and Evaluation

Only those segments where a Clean Water Section 303(d) Impairment has been determined require TMDLs. For these segments, TMDLs are only required for those parameters that are identified as impairments.

The table below includes several key data elements that warrant description. They are: Waterbody ID and Listed Portion/Assessment Unit ID (AUID), Affected Use, Category/List, and Priority.

* Waterbody ID and Listed Portion/Assessment Unit ID (AUID): For each impairment listed in the table, both a Waterbody ID (WBID) and an Assessment Unit ID (AUID) description are provided. The WBID ID describes the entire segment and is derived from basin regulations 32-38. The AUID, which includes an underscore and letter, describes the spatial extent of the impairment listings within the waterbody ID. The AUID is referred to as the "Listed Portion." In situations when the listed portion description matches the segment description, the entire segment is listed.

* Affected Use: The Affected Use refers to a designated use that is applied to the water body segment.

* Category/List: These categories describe waterbody attainment status. These entries are aligned with Environmental Protection Agency reporting categories.

1a.	Attaining	Meets designated uses
1b.	Attaining with TMDL	Meets designated uses and a TMDL exists
3b.	M&E list	Insufficient data to make a determination
4a.	TMDL	Impaired with an approved TMDL
4b.	4b Plan	Impaired with an approved 4b plan
4c.	4c	Impaired due to pollution
5.	303(d) list	Impaired without a TMDL completed

* Priority: This is the Total Maximum Daily Load development priority. Priority options within Regulation #93 include:

o H= High Priority

o M= Medium Priority

o L= Low Priority

COARFO01a	1a. Mainstem of Fountain Creek, including all tributaries and wetlands, from the source to a point immediately above the confluence with Monument Creek, except for specific listings in segment 1b.
Listed portion:	COARFO01a_C	Mainstem of Fountain Creek from source to a point immediately upstream of the confluence with Camp Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Water Supply Use	Lead (Total)	5. - 303(d) List	H
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COARFO01a_D	Mainstem of Fountain Creek from a point immediately upstream of the confluence with Camp Creek to the confluence with Monument Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Water Supply Use	Lead (Total)	5. - 303(d) List	H
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COARFO01b	1b. Severy Creek and all tributaries from the source to a point just upstream of where US Forest Service Road 330 crosses the stream.
Listed portion:	COARFO01b_A	Severy Creek and all tributaries from the source to a point just upstream of where US Forest Service Road 330 crosses the stream.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COARFO02a	2a. Mainstem of Fountain Creek from a point immediately above the confluence with Monument Creek to a point immediately above the State Highway 47 Bridge.
Listed portion:	COARFO02a_B	Mainstem of Fountain Creek fro Creek to a point immediately ab m a point immediately above ove the confluence with San the confluence with Monument d Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cyanide (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	M
Water Supply Use	Lead (Total)	5. - 303(d) List	H
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARFO02a_C	Mainstem of Fountain Creek from a point immediately below the confluence with Sand Creek to a point immediately above the conflunce with Young Hollow.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Lead (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	M
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARFO02a_D	Mainstem of Fountain Creek from a point immediately below the confluence with Young Hollow to a point immediately above the State Highway 47 Bridge.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Lead (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	M
Recreational Use	E. coli	5. - 303(d) List	H
COARFO02b	2b. Mainstem of Fountain Creek from a point immediately above the State Highway 47 Bridge to the confluence with the Arkansas River.
Listed portion:	COARFO02b_A	Mainstem of Fountain Creek from a point immediately above the State Highway 47 Bridge to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	M
Water Supply Use	Chromium VI (Total)	5. - 303(d) List	H
COARFO03a	3a. All tributaries to Fountain Creek which are within the boundaries of National Forest or Air Force Academy lands, including all wetlands, from a point immediately above the confluence with Monument Creek to the confluence with the Arkansas River, except for the mainstem of Monument Creek in the Air Force Academy lands and specific listings in segment 3b. Cheyenne Creek, including tributaries and wetlands from the source to the confluence with Fountain Creek. Bear Creek below Gold Camp Road to the confluence with Fountain Creek. Little Fountain Creek from the source to Highway 115. Rock Creek from the source to Highway 115. North Monument Creek from the source to the confluence with Monument Creek. Beaver Creek from the source to the confluence with Monument Creek.
Listed portion:	COARFO03a_B	West Monument Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Listed portion:	COARFO03a_C	Tributaries and wetlands to Cheyenne Creek not within National Forest boundaries. Bear Creek below Gold Camp Road to the confluence with Fountain Creek. Rock Creek from the National Forest boundary to Highway 115. North Monument and Beaver creeks from the source to the confluence with Monument Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARFO03a_E	Cheyenne Creek from the confluence with North and South Cheyenne Creeks to its confluence with Fountain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use Aquatic Life Use	Macroinvertebrates Copper (Dissolved)	5. - 303(d) List 5. - 303(d) List	H H
COARFO04a	4a. Mainstems of Jackson Creek, Monument Branch, Elkhorn Springs, Pine Creek, South Pine Creek, South Rockrimmon Creek, Templeton Gap North, Templeton Gap Floodway, Douglas Creek and South Douglas Creek, from the sources to confluences with Monument Creek, including all tributaries and wetlands, which are not within the boundaries of the National Forest or Air Force Academy lands.
Listed portion:	COARFO04a_A	Mainstem of Jackson Creek, Monument Branch, Elkhorn Springs, Pine Creek, South Pine Creek, South Rockrimmon Creek, Templeton Gap North, Templeton Gap Floodway, Douglas Creek, and South Douglas Creek, from the sources to the confluences with Monument Creek, including all tributaries and wetlands, which are not within the boundaries of the National Forest Academy lands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
COARFO04b	4b. All tributaries to Monument Creek from the sources to the confluences with Monument Creek which are not within the boundaries of National Forest or Air Force Academy lands, including all wetlands, from a point immediately below the confluence with North Monument Creek to the confluence with Fountain Creek, except for specific listings in segments 3a, 4a and 4c. This includes Dirty Woman Creek, Smith Creek, Black Squirrel Creek, Cottonwood Creek, Dry Creek and an unnamed tributary with the confluence at Monument Creek located near (38.948613, -104.829623).
Listed portion:	COARFO04b_A	All tributaries to Monument Creek from the sources to the confluences with Monument Creek which are not within the boundaries of National Forest or Air Force Academy lands, including all wetlands, from a point immediately below the confluence with North Monument Creek to the confluence with Fountain Creek, except for specific listings in segments 3a, 4a, and 4c. This includes Dirty Woman Creek, Smith Creek, Black Squirrel Creek, Cottonwood Creek, Dry Creek, and an unnamed tributary with the confluence at Monument Creek located near (38.948613, -104.829623).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
COARFO04c	4c. Mainstems of Kettle Creek, North Rockrimmon Creek and Mesa Creek, including tributaries and wetlands, from the sources to confluences with Monument Creek.
Listed portion:	COARFO04c_A	Mainstems of Kettle Creek, North Rockrimmon Creek and Mesa Creek, including all tributaries and wetlands, from the sources to the confluences with Monument Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
COARFO04d	4d. All tributaries with confluences with Fountain Creek from South Academy Blvd (CO83) to and including the unnamed tributary immediately south of Old Pueblo Road (38.585843, -104.669591), including tributaries and wetlands, except for Little Fountain Creek and its tributaries and wetlands, and specific listings in segments 3a, 5a and 5b. All tributaries with confluences with Fountain Creek from a point immediately above University Blvd (CO47) (38.312846, -104.590524), to the confluence with the Arkansas River.
Listed portion:	COARFO04d_A	All tributaries with confluences with Fountain Creek from South Academy Blvd (CO83) including the unnamed tributary immediately south of Old Pueblo Road (38.585843, -104.669591), including tributaries and wetlands, except for Little Fountain Creek and its tributaries and wetlands, and specific listings in segments 3a, 5a, and 5b. All tributaries with confluences with Fountain Creek from a point immediately above University Blvd (CO47) (38.312846, -104.590524) to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
COARFO04e	4e. All tributaries to Fountain Creek, including tributaries and wetlands, from a point immediately below the confluence with Monument Creek to University Blvd (CO47) near Pueblo except for specific listings in 3a, 4d, 5a and 5b.
Listed portion:	COARFO04e_B	Sand Creek (near Wigwam), including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARFO04e_C Sand Creek (near Colorado Springs), including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Listed portion:	COARFO04e_E	Little Fountain Creek, including all tributaries and wetlands, from immediately below Deadman Canyon to the confluence with Fountain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARFO04e_F	Spring Creek from its source to the confluence with Fountain Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Water Supply Use	Sulfate	5. - 303(d) List	L
Listed portion:	COARFO04e_G	All tributaries to Fountain Creek, including tributaries and wetlands, from a point immediately below the confluence with Monument Creek to University Blvd (CO47) except for Little Fountain Creek, Sand Creek(s) (near Wigwam and Colorado Springs), Spring Creek, and specific listings in segments 3a, 4d, 5a and 5b.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
COARFO05a	5a. Jimmy Camp Creek, including all tributaries and wetlands from the source to Old Pueblo Road (38.673200, -104.696739). Williams Creek, including all tributaries and wetlands, from the source to the confluence with Fountain Creek.
Listed portion:	COARFO05a_A	Jimmy Camp Creek, including all tributaries and wetlands from the source to the irrigation diversion east of Old Pueblo Road (38.694, -104.683). Williams Creek, including all tributaries and wetlands, from the source to the confluence with Fountain Creek
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARFO05a_B	Jimmy Camp Creek, including all tributaries and wetlands from the irrigation diversion east of Old Pueblo Road (38.694, -104.683) to Old Pueblo Road (38.6732, -104.696739).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COARFO05b	5b. Jimmy Camp Creek from Old Pueblo Road (38.673200, -104.696739) to the confluence with Fountain Creek, including the marshland located on the 60-acre parcel at 13030 Old Pueblo Road. Unnamed tributary from the boundary of Fort Carson (38.694465, -104.738735) to the confluence with Fountain Creek.
Listed portion:	COARFO05b_A	Jimmy Camp Creek from Old Pueblo Road (38.6732, -104.696739) to the confluence with Fountain Creek, including the marshland located on the 60-acre parcel at 13030 Old Pueblo Road. Unnamed tributary from the boundary of Fort Carson (38.694465, -104.738735).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COARFO06	6. Mainstem of Monument Creek, from the boundary of National Forest lands to the confluence with Fountain Creek.
Listed portion:	COARFO06_B	Mainstem of Monument Creek, from the boundary of National Forest lands to the confluence with Jackson Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Aquatic Life Use	Temperature	5. - 303(d) List	M
Listed portion:	COARFO06_C	Mainstem of Monument Creek, from the confluence with Jackson Creek to the confluence with Fountain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cyanide (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Aquatic Life Use	Temperature	5. - 303(d) List	M
Water Supply Use	Lead (Total)	5. - 303(d) List	H
COARFO07b	7b. Prospect Lake, Quail Lake, and Monument Lake.
Listed portion:	COARFO07b_B	Prospect Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Ammonia	3b. - M&E List	N/A
Aquatic Life Use	Arsenic (Total)	3b. - M&E List	N/A
COARLA01a	1a. Mainstem of the Arkansas River from a point immediately above the confluence with Fountain Creek to immediately above the Colorado Canal headgate near Avondale.
Listed portion:	COARLA01a_A	Mainstem of the Arkansas River from a point immediately above the confluence with Fountain Creek to immediately above the Colorado Canal headgate near Avondale.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
COARLA01b	1b. Mainstem of the Arkansas River from the Colorado Canal headgate to the inlet to John Martin Reservoir.
Listed portion:	COARLA01b_A	Mainstem of the Arkansas River from the Colorado Canal headgate to the inlet to John Martin Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Chromium VI (Total)	5. - 303(d) List	H
COARLA01c	1c. Mainstem of the Arkansas River from the outlet of John Martin Reservoir to the Colorado/Kansas border.
Listed portion:	COARLA01c_A	Mainstem of the Arkansas River from the outlet of John Martin Reservoir to the Colorado/Kansas border.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
COARLA02a	2a. All tributaries to the Arkansas River, including wetlands, from the Colorado Canal headgate to the Colorado/Kansas border except for specific listings in segments 2b, 2c, 2d, 3a, through 9b, and Middle Arkansas Basin listings.
Listed portion:	COARLA02a_B	All tributaries to the Arkansas River, including wetlands, from the Colorado Canal headgate to the Colorado/Kansas border except for specific listings in segments 2b, 2c, 2d, 3a through 9b, and Middle Arkansas Basin listings.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COARLA03a	3a. Mainstem of the Apishapa River, including all tributaries and wetlands, from the source to I-25, except for specific listings in Middle Arkansas segment 1 and Lower Arkansas segments 3b and 3c.
Listed portion:	COARLA03a_A	Mainstem of the Apishapa River, including all tributaries and wetlands, from the source to I-25, except for specific listings in Middle Arkansas segment 1 and Lower Arkansas segments 3b and 3c.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
COARLA04a	4a. Mainstem of the Apishapa River from I-25 to the confluence with the Arkansas River. Mainstem of Timpas Creek from the source to the Arkansas River.
Listed portion:	COARLA04a_A Mainstem of Timpas Creek from the source to the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COARLA04a_B	Mainstem of the Apishapa River from I-25 to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Agricultural Use	Selenium (Total)	5. - 303(d) List	M
COARLA05a	5a. Mainstem of the North Fork of the Purgatoire River, including all tributaries and wetlands, from the source to a point immediately below the confluence with Guajatoyah Creek; mainstem of the Middle Fork of the Purgatoire River, including all tributaries and wetlands, from the source to the Bar Ni Ranch Road at Stonewall Gap; Mainstem of the South Fork of the Purgatoire River, including all tributaries and wetlands, from the source to Tercio.
Listed portion:	COARLA05a_A	Mainstem of the North Fork of the Purgatoire River, including all tributaries and wetlands, from the source to a point immediately below the confluence with Guajatoyah Creek; mainstem of the Middle Fork of the Purgatoire River, including all tributaries and wetlands, from the source to the Bar Ni Ranch Road at Stonewall Gap; Mainstem of the South Fork of the Purgatoire River, including all tributaries and wetlands, from the source to Tercio.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COARLA05b	5b. Mainstem of the North Fork of the Purgatoire River, including all tributaries and wetlands, from a point immediately below the confluence with Guajatoyah Creek to the confluence with the Purgatoire River. Mainstem of the Middle Fork of the Purgatoire River from the Bar Ni Ranch Road at Stonewall Gap to the confluence with the North Fork of the Purgatoire River. Mainstem of the South Fork of the Purgatoire River from Tercio to the confluence with the Purgatoire River. Mainstem of the Purgatoire River to Trinidad Lake. Mainstem of Long Canyon Creek from the source to Trinidad Reservoir.
Listed portion:	COARLA05b_A	NF of the Purgatoire River, including all tributaries and wetlands, from Guajatoyah Ck to Purgatoire River. Middle Fork of the Purgatoire River from the Bar Ni Ranch Road at Stonewall Gap to NF of the Purgatoire River. SF of the Purgatoire River from Tercio to the confluence with the Purgatoire River. Mainstem of the Purgatoire River to Trinidad Lake. Mainstem of Long Canyon Creek from the source to Trinidad Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COARLA05b_B	Long Canyon Creek from source to Trinidad Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COARLA06a	6a.All tributaries to the Purgatoire River, including all wetlands, from the source to Interstate 25, except for specific listings in segments 4b, 5a, 5b, 5c and 6b.
Listed portion:	COARLA06a_C	Sarcillo Canyon and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	COARLA06a_D	Reilly Canyon and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	COARLA06a_F	Bingham Canyon
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
COARLA07	7. Mainstem of the Purgatoire River from Interstate 25 to the confluence with the Arkansas River.
Listed portion:	COARLA07_A	Mainstem of the Purgatoire River from Interstate 25 to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COARLA09a	9a. Mainstems of Adobe, Buffalo, Cheyenne, Clay, Gageby, Horse, Two Butte, Wildhorse and Wolf Creeks from their sources to their confluences with the Arkansas River. Mainstems of Chacuacho Creek, San Francisco Creek, Trinchera Creek and Van Bremer Arroyo from their sources to their confluences with the Purgatoire River. Mainstem of Willow Creek from Highway 287 to the confluence with the Arkansas River. Mainstem of Big Sandy Creek from the source to the El Paso/Elbert county line. Mainstem of South Rush Creek from the source to the confluence with Rush Creek. Mainstem of Middle Rush Creek from the source to the confluence with North Rush Creek. North Rush Creek from the source to the confluence with South Rush Creek. Mainstem of Rush Creek to the Lincoln County Line. Mainstem of Antelope Creek from the source to the confluence with Rush Creek; the West May Valley drain from the Fort Lyon Canal to the confluence with the Arkansas River.
Listed portion:	COARLA09a_B	Mainstem of Horse Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COARLA09a_C	Mainstem of Adobe Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COARLA09a_D	Mainstem (MS) of Buffalo, Cheyenne, Clay, Gageby, Two Butte, Wildhorse and Wolf Cks from sources to the Ark. R. MS of Chacuacho, San Francisco, Trinchera and Van Bremer Cks from sources to the Purgatoire R. MS of Willow Ck from HWY 287 to the confl with the Ark R. MS of Big Sandy Creek from source to the El Paso/Elbert cty line. MS of South Rush Ck from source to the confl with Rush Ck. MS of M Rush Ck from source to the confl with N Rush Ck N Rush Ck from source to the confl with S Rush Ck. MS of Rush Ck to the Lincoln cty Line. MS of Antelope Ck from source to the conf with Rush Ck; the W May Valley drain from Ft Lyon Canal to the confl with the Ark R.except Horse ck and Wiley Ditch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
Listed portion:	COARLA09a_E	Wiley Drainage Ditch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Agricultural Use	Selenium (Total)	5. - 303(d) List	L
Listed portion:	COARLA09a_F	Wild Horse Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COARLA09b	9b. Mainstem of Apache Creek from the source to the confluence with the North Rush Creek. Mainstem of Breckenridge Creek from the source to the confluence with Horse Creek. Mainstem of Little Horse Creek from the source to the confluence with Horse Creek. Mainstem of Bob Creek from the source to Meredith Reservoir. Mainstem of Big Sandy Creek within Prowers County. Mainstem of Rule Creek from the Bent/Las Animas county line to John Martin Reservoir. Mainstem of Muddy Creek from the south boundary of the Setchfield State Wildlife Area to the confluence with Rule Creek. Mainstem of Caddoa Creek from CC Road to the confluence with the Arkansas River. Mainstem of Cat Creek from the source to the confluence with Clay Creek. Mainstem of Mustang Creek from the source to the confluence with Apishapa River. Mainstem of Chicosa Creek from the source to the Arkansas River. Mainstem of Smith Canyon from the Otero/Las Animas county line to the confluence with the Purgatoire River. Mainstem of Mud Creek from V Road to the confluence with the Arkansas River. Mainstems of Frijole Creek and Luning Arroyo from their sources to their confluences with the Purgatoire River. Mainstem of Blackwell Arroyo from its source to the confluence with Luning Arroyo. Mainstem of San Isidro Creek from the source to the confluence with San Francisco Creek.
Listed portion:	COARLA09b_A	Mainstem (MS) of Apache Ck. MS of Breckenridge Ck. MS of Little Horse Ck. MS of Bob Ck. MS of Rule Ck from Bent/Las Animas County line. MS of Muddy Ck from south boundary of Setchfield SWA. MS of Caddoa Ck from CC Rd. MS of Cat Ck. MS of Mustang Ck from the source to the confl. with Apishapa R. MS of Chicosa Ck from source to the Ark. R. MS of Smith Canyon from Otero/Las Animas county line to the confl. with Purgatoire R. MS of Mud Ck from V Rd to the confl. with the Arkansas R. MS of Frijole Ck and Luning Arroyo from sources to confl. with Purgatoire R. MS of Blackwell Arroyo from source to the confl. with Luning Arroyo. MS of San Isidro Ck from source to the confl. with San Francisco Ck.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COARLA09b_B	Big Sandy Creek within Prowers County.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
COARLA10	10. Two Buttes Reservoir, Two Buttes Pond, Hasty Lake, Holbrook Reservoir, Burchfield Lake, Nee-Skah (Queens) Reservoir, Adobe Creek Reservoir, Neeso Pah Reservoir, Nee Noshe Reservoir; Nee Gronda Reservoir.
Listed portion:	COARLA10_B	Adobe Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COARLA10_C	Nee Gronda Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COARLA11	11. John Martin Reservoir.
Listed portion:	COARLA11_A	John Martin Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARLA12	12. Lake Henry, Lake Meredith.
Listed portion:	COARLA12_A	Lake Meredith.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Listed portion:	COARLA12_B	Lake Henry.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COARLA15	15. All lakes and reservoirs tributary to the mainstem of the North Fork of the Purgatoire River from the source to a point immediately below the confluence with Guajatoyah Creek. All lakes and reservoirs tributary to the Middle Fork of the Purgatoire River from the source to the USGS gage at Stonewall. Mainstem of the South Fork of the Purgatoire River, from the source to Tercio. Monument Lake, North Lake, Trinidad Lake, Long Canyon Reservoir and Lake Dorothey.
Listed portion:	COARLA15_B	Trinidad Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen (Temperature)	5. - 303(d) List	H
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARMA02	2. Mainstem of the Arkansas River from the outlet of Pueblo Reservoir to a point immediately above the confluence with Wildhorse/Dry Creek Arroyo.
Listed portion:	COARMA02_A	Mainstem of the Arkansas River from Blue Ribbon Creek to a point immediately above the confluence with Wildhorse/Dry Creek Arroyo.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Listed portion:	COARMA02_B	Mainstem of the Arkansas River from Pueblo Reservoir to Blue Ribbon Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COARMA03	3. Mainstem of the Arkansas River from a point immediately above the confluence with Wildhorse/Dry Creek Arroyo to a point immediately above the confluence with Fountain Creek.
Listed portion:	COARMA03_A	Mainstem of the Arkansas River from a point immediately above the confluence with Wildhorse/Dry Creek Arroyo to a point immediately above the confluence with Fountain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	L
COARMA04a	4a. Mainstem of Wildhorse Creek from the source to the confluence with the Arkansas River.
Listed portion:	COARMA04a_A	Mainstem of Wildhorse Creek from the source to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	4a. - TMDL	N/A
COARMA04b	4b. Mainstem of Rock Creek, Salt Creek and Peck Creek from their sources to the confluence with the Arkansas River.
Listed portion:	COARMA04b_B	Mainstem of Salt Creek
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COARMA04c	4c. Mainstem of Chico Creek, including all tributaries and wetlands, from the source to the confluence with the Arkansas River, except for specific listings in segment 4f.
Listed portion:	COARMA04c_A	Mainstem of Chico Creek, including all tributaries and wetlands, from the source to the confluence with the Arkansas River, except for specific listings in segment 4f.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	5. - 303(d) List	H
COARMA04g	4g. Mainstem of Pesthouse Gulch, from the source to the confluence with Wildhorse Creek.
Listed portion:	COARMA04g_A	Mainstem of Pesthouse Gulch, from the source to the confluence with Wildhorse Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COARMA06b	6b. Mainstem of the Saint Charles River from the confluence with Edson Arroyo to the confluence with the Arkansas River.
Listed portion:	COARMA06b_A	Mainstem of the Saint Charles River from the confluence with Edson Arroyo to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Chromium VI (Total)	5. - 303(d) List	H
COARMA07b	7b. Mainstem of Greenhorn Creek, including all tributaries and wetlands,from the San Isabel National Forest boundary to a point immediately below the Greenhorn Highline (Hayden Supply Ditch) diversion dam. Mainstem of Graneros Creek below the San Isabel National Forest boundary. Muddy Creek, including all tributaries and wetlands, from the San Isabel National Forest boundary to 232/Bondurant Road.
Listed portion:	COARMA07b_A	Mainstem of Greenhorn Creek, including all tributaries and wetlands, from the San Isabel National Forest boundary to a point immediately below the Greenhorn Highline (Hayden Supply Ditch) diversion dam. Mainstem of Graneros Creek below the San Isabel National Forest boundary. Muddy Creek, including all tributaries and wetlands, from the San Isabel National Forest boundary to 232/Bondurant Road.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARMA09	9. Mainstem of Greenhorn Creek, from a point immediately below the Greenhorn Highline (Hayden Supply Ditch) diversion dam, to the confluence with the Saint Charles River.
Listed portion:	COARMA09_A	Mainstem of Greenhorn Creek, from a point immediately below the Greenhorn Highline (Hayden Supply Ditch) diversion dam, to the confluence with the Saint Charles River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COARMA10	10. Mainstem of Sixmile Creek from the source to the confluence with the Arkansas River.
Listed portion:	COARMA10_A	Mainstem of Sixmile Creek from the source to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COARMA11b	11b. Mainstem of the Huerfano River, including all tributaries and wetlands, from 570 Road near Malachite to Highway 69 at Badito, except for the specific listings in segment 1, 11a and 17.
Listed portion:	COARMA11b_A	Mainstem of the Huerfano River, including all tributaries and wetlands, from 570 Road near Malachite to Highway 69 at Badito, except for the specific listings in segment 1, 11a and 17.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COARMA12	12. Mainstem of Huerfano River from Highway 69 at Badito to the confluence with the Arkansas River.
Listed portion:	COARMA12_A	Mainstem of Huerfano River from Highway 69 at Badito to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Chromium VI (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COARMA13a	13a. All tributaries, including wetlands, to the Cucharas River within the San Isabel National Forest boundaries, except for the specific listings in segment 1. Mainstem of the Cucharas River, from the source to a point immediately above the confluence with Middle Creek, except for the specific listings in segment 1. Wahatoya Creek, including all tributaries and wetlands, from the source to the confluence with the Cucharas River, except for the specific listings in segment 1. All tributaries to Middle Creek, including wetlands, from the source to a point immediately below the confluence of North and South Middle Creeks.
Listed portion:	COARMA13a_B	Wahatoya Creek within the national forest boundary.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COARMA13a_D	Wahatoya Creek, including all tributaries and wetlands, from the national forest boundary to the confluence with the Cucharas River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COARMA13c	13c. All tributaries and wetlands to the Cucharas and Huerfano Rivers not on forest service lands, except for specific listings in 13a and 13b.
Listed portion:	COARMA13c_A	All tributaries and wetlands to the Cucharas and Huerfano Rivers not on forest service lands, except for specific listings in 13a and 13b.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	H
COARMA14	14. Mainstem of the Cucharas River from the point of diversion for the Walsenburg public water supply to the outlet of Cucharas Reservoir.
Listed portion:	COARMA14_A	Mainstem of the Cucharas River from the point of diversion for the Walsenburg public water supply to the outlet of Cucharas Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARMA18a	18a. Mainstem of Boggs Creek from the source to Pueblo Reservoir.
Listed portion:	COARMA18a_A	Mainstem of Boggs Creek from the source to Pueblo Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Uranium (Total)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	4a. - TMDL	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COARMA20	20. Pueblo Reservoir.
Listed portion:	COARMA20_A	Pueblo Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COARMA26	26. Horseshoe Lake, Martin Lake (Ohem Lake) and Walsenburg Lower Town Lake.
Listed portion:	COARMA26_B	Horseshoe Lake (Lake Meriam).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COARMA26_C	Martin Lake (Ohem Lake)
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Temperature	5. - 303(d) List	L
COARUA01a	1a. All streams and wetlands within Mount Massive and Collegiate Peaks Wilderness areas.
Listed portion:	COARUA01a_B	(McNasser Gulch, South Fork of Lake Creek, and Sayres Gulch) within Mount Massive and Collegiate Peaks Wilderness areas.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Listed portion:	COARUA01a_C	(Graham Gulch, Mountain Boy Gulch, and North Fork of Lake Creek) within Mount Massive and Collegiate Peaks Wilderness areas.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
COARUA01b	1b. Mainstem of the East Fork of the Arkansas River from its source to a point immediately above the confluence with Birdseye Gulch.
Listed portion:	COARUA01b_A	Mainstem of the East Fork of the Arkansas River from its source to a point immediately above the confluence with Birdseye Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COARUA02a	2a. Mainstem of the East Fork of the Arkansas River and the Arkansas River from a point immediately above the confluence with Birdseye Gulch to a point immediately above the confluence with the California Gulch.
Listed portion:	COARUA02a_A	Mainstem of the East Fork of the Arkansas River and the Arkansas River from a point immediately above the confluence with Birdseye Gulch to a point immediately above the confluence with the California Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARUA02b	2b. Mainstem of the Arkansas River from a point immediately above California Gulch to a point immediately above the confluence with Lake Fork.
Listed portion:	COARUA02b_A	Mainstem of the Arkansas River from a point immediately above California Gulch to a point immediately above the confluence with Lake Fork.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COARUA02c	2c. Mainstem of the Arkansas River from a point immediately above the confluence with the Lake Fork to a point immediately above the confluence with Lake Creek.
Listed portion:	COARUA02c_A	Mainstem of the Arkansas River from a point immediately above the confluence with Lake Fork to a point immediately above the confluence with Lake Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARUA04a	4a. Mainstem of the Arkansas River from the Chaffee/Fremont County Line to a point immediately above Highway 115 bridge (38.390243, -105.068648), due east of Florence.
Listed portion:	COARUA04a_B	Mainstem of the Arkansas River from the Chaffee/ Fremont County Line to Texas Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Listed portion:	COARUA04a_C	Mainstem of the Arkansas River from Texas Creek to a point immediately above Hwy 115 bridge, (38.390243, -105.068648) due east of Florence.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
COARUA04b	4b. Mainstem of the Arkansas River from a point immediately above Highway 115 bridge (38.390243, -105.068648), due east of Florence, to the inlet of Pueblo Reservoir.
Listed portion:	COARUA04b_A	Mainstem of the Arkansas River from a point immediately above Highway 115 bridge, (38.390243, -105.068648) due east of Florence, to the inlet of Pueblo Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
COARUA05a	5a. All tributaries to the Arkansas River, including wetlands, from the source to immediately below the confluence with Brown?s Creek, except for specific listings in segments 5b through 12b.
Listed portion:	COARUA05a_A	All tributaries to the Arkansas River, including wetlands, from the source to immediately below the confluence with Brown's Creek, except for the Lake Fork below Sugarloaf Dam, Colorado Gulch and its tributaries, Halfmoon Creek, and specific listings in segments 5b through 12b.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COARUA05a_C	Colorado Gulch and its tributaries
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Cadmium (Total)	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	H
Listed portion:	COARUA05a_D	Halfmoon Creek
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COARUA05a_E	Lake Fork below Sugarloaf Dam to County Road 5.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Listed portion:	COARUA05a_F	Lake Fork from County Road 5 to the confluence of the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COARUA05b	5b. Mainstem of Trout Creek from its source to Trout Creek Reservoir, including all tributaries and wetlands.
Listed portion:	COARUA05b_A	Mainstem of Trout Creek from its source to Trout Creek Reservoir, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COARUA07	7. Mainstem of Evans Gulch from the source to the confluence with the Arkansas River.
Listed portion:	COARUA07_A	Mainstem of Evans Gulch from the source to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARUA08b	8b. Mainstem of Iowa Gulch from a point immediately below the historic upper ASARCO water supply intake at 39.224327, -106.223432 to a point immediately below the headgate of the Paddock #1 Ditch (Iowa Ditch) at 39.215532, -106.286037.
Listed portion:	COARUA08b_A	Mainstem of Iowa Gulch from a point immediately below the ASARCO water supply intake to a point immediately below the headgate of the Paddock #1 Ditch (Iowa Ditch).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COARUA10	10. Mainstem of Lake Creek, including all tributaries and wetlands, from the source to the confluence with the Arkansas River, except for the specific listing in segment 11.
Listed portion:	COARUA10_A	Mainstem of Lake Creek, including all tributaries and wetlands, from the source to the confluence with the Arkansas River, except for the specific listing in segment 11.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	H
COARUA11	11. Mainstem of South Fork of Lake Creek, including all tributaries and wetlands, from the source to the confluence with Lake Creek.
Listed portion:	COARUA11_A	Mainstem of South Fork of Lake Creek, including all tributaries and wetlands, from the source to the confluence with Lake Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COARUA12a	12a. Mainstem of Chalk Creek from the source to the confluence with the Arkansas River.
Listed portion:	COARUA12a_A	Mainstem of Chalk Creek from the source to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
COARUA14c	14c. Mainstems of North and South Hardscrabble Creeks, including all tributaries and wetlands, from their sources to their confluences.
Listed portion:	COARUA14c_B	North Hardscrabble Creek and tributaries, from the source to the confluence.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COARUA14f	14f. Turkey Creek including all tributaries and wetlands from its source to immediately below the confluence with Little Turkey Creek at 38.594727, -104.851458.
Listed portion:	COARUA14f_B	Turkey Creek above the unnamed tributary that drains Mount Pittsburg (38.615, -104.903)
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
COARUA15a	15a. Mainstem of Badger Creek from the source to the confluence with the Arkansas, including all tributaries and wetlands. Mainstem of Texas Creek from the forest service boundary to the confluence with the Arkansas River, including all tributaries and wetlands which are not on forest service land.
Listed portion:	COARUA15a_A	Mainstem of Badger from the source to the confluence with the Arkansas, including all tributaries ans wetlands, Mainstem of Texas Creek from the forest service boundry to the confluence with the Arkansas River, including all tributaries and wetlands which are not on the forest service land.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
COARUA15b	15b. Mainstem of Grape Creek, including all tributaries and wetlands, from the source to the outlet of De Weese Reservoir, except for specific listings in segment 25. Mainstems of Hayden, Hamilton, Stout, and Big Cottonwood Creeks, including all tributaries and wetlands, from their sources to their confluences with the Arkansas River. Tributaries and wetlands to Texas Creek which are on Forest Service Land. Mainstem of Newlin Creek from the National Forest boundary to County Road 92 (38.300765, -105.140927).
Listed portion:	COARUA15b_A	Mainstem of Grape Creek, including all tributaries and wetlands, from the source to Antelope Creek, except for specific listings in segment 25. Mainstems of Hayden, Hamilton, Stout, and Big Cottonwood Creeks, including all tributaries and wetlands, from their sources to their confluences with the Arkansas River. Tributaries and wetlands to Texas Creek which are on Forest Service Land. Mainstem of Newlin Creek from the National Forest boundary to County Road 92 (38.300765, -105.140927).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COARUA15b_B	Grape Creek and its tributaries from Antelope Creek to Deweese Reservoir
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COARUA20b	20b. Mainstem of Fourmile Creek, including all tributaries and wetlands, from the confluence with Long Gulch to the confluence with the Arkansas River.
Listed portion:	COARUA20b_A	Mainstem of Fourmile Creek, including all tributaries and wetlands, from the confluence with Long Gulch to the confluence with the Arkansas River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COARUA21a	21a. Mainstem of Cripple Creek from the source to a point 1.5 miles upstream of the confluence with Fourmile Creek.
Listed portion:	COARUA21a_B	Mainstem of Cripple Creek from Squaw Creek to a point 1.5 miles upstream of the confluence with Fourmile Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
COARUA30	30. Turquoise Reservoir, Clear Creek Reservoir, Twin Lakes and Mt. Elbert Forebay.
Listed portion:	COARUA30_B	Twin Lake West.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COARUA35	35. DeWeese Reservoir.
Listed portion:	COARUA35_A	DeWeese Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Total Phosphorus	5. - 303(d) List	H
COARUA38	38. All lakes and reservoirs tributary to the mainstem of East and West Beaver Creeks from the source to the confluence with Beaver Creek. This segment includes Skagway and Bison Reservoirs.
Listed portion:	COARUA38_B	Skagway Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Mercury (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COARUA40	40. Brush Hollow Reservoir.
Listed portion:	COARUA40_A	Brush Hollow Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
COARUA41	41. Teller Reservoir
Listed portion:	COARUA41_A	Teller Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	3b. - M&E List	N/A
COGULD02	2. Mainstem of the Dolores River from the Highway 141 road crossing near Slick Rock to the Colorado/Utah border.
Listed portion:	COGULD02_B	Mainstem of Dolores River from Big Gypsum Creek to East Paradox Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature (Provisional)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Listed portion:	COGULD02_C	Mainstem of Dolores River from East Paradox Creek to the San Miguel River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Chloride	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Temperature (Provisional)	5. - 303(d) List	H
Listed portion:	COGULD02_D	Mainstem of the Dolores River Above Big Gypsum Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COGULD03a	3a. All tributaries to the Dolores River, including all wetlands, from the bridge at Bradfield Ranch (Forest Route 505, near Montezuma/Dolores County Line) to the Colorado/Utah border, except for specific listings in Segments 3b, 3c, 4, 5, and 6.
Listed portion:	COGULD03a_B	Disappointment Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Nitrate	3b. - M&E List	N/A
COGULD04	4. Mainstem of West Paradox Creek from the Manti-La Sal National Forest boundary to the confluence with the Dolores River. Mainstem and all tributaries to Blue Creek from the Uncompahgre National Forest boundary to the confluence with the Dolores River.
Listed portion:	COGULD04_B	Mainstem of West Paradox Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COGULD05	5. Mainstem of West Creek from the source to the confluence with the Dolores River. Roc Creek including all tributaries and wetlands from the Manti-La Sal National Forest boundary to the confluence with the Dolores River. La Sal Creek, including all tributaries and wetlands, from the Utah/Colorado border to the confluence with the Dolores River. Mesa Creek, including all tributaries and wetlands, from the Uncompahgre National Forest boundary to the confluence with the Dolores River.
Listed portion:	COGULD05_B	Rock Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Listed portion:	COGULD05_D	Mesa Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGULD05_E	Mainstem of West Creek from the source to the confluence with the Dolores River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COGULG01	1. Mainstem of the Gunnison River from the outlet of Crystal Reservoir to Highway 65 (38.772574, -108.002634).
Listed portion:	COGULG01_C	Mainstem of the Gunnison River from North Fork to Highway 65.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
COGULG02	2. Mainstem of the Gunnison River from Highway 65 (38.772574, -108.002634) to the confluence with the Colorado River.
Listed portion:	COGULG02_A	Mainstem of the Gunnison River from a point immediately above the confluence with the Uncompahgre River to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	L
Listed portion:	COGULG02_B	Mainstem of the Gunnison River from Highway 65 to a point immediately above the confluence with the Uncompahgre River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGULG04a	4a. All tributaries to the Gunnison River, including all wetlands which are not within national forest boundaries, from the outlet of Crystal Reservoir to the confluence with the Colorado River, except for specific listings in the North Fork of the Gunnison River sub-basin, the Uncompahgre River sub-basin, and in Segments 3, 4b, 4c, 5a, 5b, 6a, 6b, 6c, 7, 8a, 8b, 10 and 12.
Listed portion:	COGULG04a_D	Whitewater Creek from below Brandon Ditch to confluence with Gunnison River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Selenium (Total)	4a. - TMDL	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	4a. - TMDL	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
Listed portion:	COGULG04a_E	Wells Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Selenium (Total)	4a. - TMDL	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	4a. - TMDL	N/A
Listed portion:	COGULG04a_K	All tributaries to the Gunnison River, including all wetlands, which are not within national forest boundaries and to which a TMDL does apply, from the outlet of Crystal Reservoir to the confluence with the Colorado River, except for Cummings Gulch, Whitewater Creek below Brandon Ditch, Wells Gulch, Peach Valley Creek, and specific listings in the North Fork of the Gunnison River sub-basin, the Uncompahgre River sub-basin, and Segments 3, 4b, 4c, 5a, 5b, 6a, 6b, 6c, 7, 8a, 8b, 10 and 12.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Selenium (Total)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	4a. - TMDL	N/A
Listed portion:	COGULG04a_L	Cummings Gulch, Peach Valley Creek, and Sunflower Drain including its tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Selenium (Total)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	4a. - TMDL	N/A
Aquatic Life Use	Total Phosphorus	5. - 303(d) List	M
Water Supply Use	Nitrate	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
COGULG04b	4b. All tributaries to Reeder, Hollenbeck, and Juniata Reservoirs, and the mainstem of Kannah Creek below the point of diversion for public water supply (38.961321, -108.229830).
Listed portion:	COGULG04b_B	Mainstem of Kannah Creek below point of diversion for public water system (38.961321, -108.229830).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Selenium (Total)	4a. - TMDL	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COGULG04b_C	All tributaries and wetlands to Reeder, Hollenbeck and Juniata Reservoirs, excluding Kannah Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COGULG04c	4c. Mainstem of Red Rock Creek from the boundary of Black Canyon of the Gunnison National Park to the confluence of the Gunnison River.
Listed portion:	COGULG04c_A	Mainstem of Red Rock Creek from the boundary of Black Canyon of the Gunnison National Park to the confluence of the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Selenium (Total)	4a. - TMDL	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Recreational Use	E. coli	5. - 303(d) List	H
COGULG05a	5a. Mainstem of North Fork Escalante Creek from the national forest boundary to the confluence with Escalante Creek.
Listed portion:	COGULG05a_A	Mainstem of North Fork Escalante Creek from the national forest boundary to the confluence with Escalante Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COGULG06a	6a. Mainstem of Escalante Creek from the national forest boundary to the Delta/Montrose County line (38.668215, -108.328144); mainstem of Little Dominguez from the national forest boundary to Big Dominguez Creek; mainstem of Big Dominguez from the national forest boundary to the Gunnison River.
Listed portion:	COGULG06a_A	Mainstem of Escalante Creek from the national forest boundary to the Delta County Line; mainstem of Little Dominguez from the national forest boundary to Big Dominguez Creek; mainstem of Big Dominguez from the national forest boundary to the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COGULG06c	06c. Mainstem of Escalante Creek from the Delta/Montrose County line (38.668215, -108.328144) to the Gunnison River.
Listed portion:	COGULG06c_A	Mainstem of Escalante Creek from the Delta County line to the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGULG07a	7a. Mainstem of Ward Creek, from the national forest boundary to the confluence with Dirty George Creek.
Listed portion:	COGULG07a_A	Mainstem of Ward Creek, from the national forest boundary to the confluence with Dirty George Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COGULG07b	7b. Mainstem of Surface Creek from the point of diversion of water supply (38.965216, -107.876031) to the confluence with Tongue Creek; mainstem of Tongue Creek from its inception at the confluence of Ward Creek and Dirty George Creek to the confluence with the Gunnison River; mainstem of Youngs Creek from the national forest boundary to the confluence with Kiser Creek; mainstem of Kiser Creek from the national forest boundary to the confluence with Ward Creek.
Listed portion:	COGULG07b_A	Youngs Creek from the USFS boundary to Kiser Creek; Kiser Creek from the USFS boundary to the confluence with Ward Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGULG07b_C	Mainstem of Tongue Creek from its inception at the confluence of Ward Creek and Dirty George Creek to the confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Listed portion:	COGULG07b_D	Mainstem of Surface Creek from the point of diversion of water supply to the confluence with Tongue Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COGULG09	9. Fruitgrowers Reservoir.
Listed portion:	COGULG09_A	Fruitgrowers Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	4a. - TMDL	N/A
COGULG11b	11b. All tributaries to the Smith Fork, including all wetlands, which are within the West Elk Wilderness Area.
Listed portion:	COGULG11b_B	Lunch Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
COGULG12	12. All tributaries to the Smith Fork, including all wetlands, which are not within national forest boundaries, except for the specific listing in Segment 11a.
Listed portion:	COGULG12_B	Muddy Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGULG15	15. Island Lake, Eggleston Lake, and Trickle Park Reservoir (aka Park Reservoir).
Listed portion:	COGULG15_B	Eggleston Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COGULG16	16. All lakes and reservoirs that are tributary to the Gunnison River, from the outlet of Crystal Reservoir to the confluence with the Colorado River, and not within national forest boundaries, excluding the listings in the North Fork of the Gunnison sub-basin, the Uncompahgre River sub-basin, and Segments 9, 13, and 19. This segment includes Poison Springs Reservoir, Dry Fork Reservoir, Delta Reservoir, Winkler Reservoir, Desert Reservoir, Alkali Reservoir, Cheney Reservoir, Juniata Reservoir, Hallenbeck Reservoir, Reeder Reservoir, Enochs Lake, Gobbo Reservoir, Schrader Reservoir, and King Reservoir.
Listed portion:	COGULG16_B	Jatz Bottomlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Listed portion:	COGULG16_C	Maggio Ponds.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COGULG16_D	Peters Ponds 1, 2, 3, and 4.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
COGUNF02	2. Mainstem of North Fork of the Gunnison River from its inception at the confluence of Muddy Creek and Anthracite Creek to the Black Bridge (41.75 Drive) above Paonia.
Listed portion:	COGUNF02_A	Mainstem of North Fork of the Gunnison River from its inception at the confluence of Muddy Creek and Anthracite Creek to the Black Bridge (41.75 Drive) above Paonia.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COGUNF03	3. Mainstem of North Fork of the Gunnison River from the Black Bridge (41.75 Drive) above Paonia to the confluence with the Gunnison River.
Listed portion:	COGUNF03_B	Mainstem of North Fork of the Gunnison River from the Black Bridge (41.75 Drive) above Paonia to the confluence with the unnamed tributary east of Lazear Colorado.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COGUNF03_C	Mainstem of North Fork of the Gunnison River from the unnamed tributary east of Lazear Colorado to the confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
COGUNF04a	4a. Tributaries and wetlands to Muddy Creek within national forest boundaries. Anthracite Creek, including all tributaries and wetlands, from the source to the confluence with Muddy Creek. All tributaries to the North Fork of the Gunnison from its inception at the confluence of Muddy Creek and Anthracite Creek to the confluence with the Gunnison River within national forest boundaries. This segment excludes the specific listings in Segments 1 and 4c.
Listed portion:	COGUNF04a_B	Ruby Anthracite Creek and its tributaries in the National forest except for the tributaries to Lake Irwin.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGUNF04a_C	Anthracite Creek and its tributaries and all tributaries to the North Fork of the Gunnison within the national forest boundaries. Except for specific listings in Segments 1 and 4c.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
COGUNF04b	4b. Muddy Creek, including all tributaries and wetlands, from the national forest boundary to the confluence with Anthracite Creek, except for the specific listings in Segment 1.
Listed portion:	COGUNF04b_B	East Muddy Creek from Forest Boundary to Confluence with Muddy Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUNF04b_D	Mainstem of Muddy Creek to Paonia Reservoir.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUNF04b_E	Mainstem of Muddy Creek from Paonia Reservoir to Anthracite Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Lead (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli (May-October)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COGUNF04c	4c. All tributaries to Lake Irwin from their sources to the inlet of Lake Irwin.
Listed portion:	COGUNF04c_B	All tributaries and wetlands to Lake Irwin.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COGUNF05a	5a. Mainstems of Hubbard Creek, Terror Creek, and Minnesota Creek, from the national forest boundary to their confluences with the North Fork of the Gunnison River; mainstem of Jay Creek from its source to its confluence with the North Fork of the Gunnison River.
Listed portion:	COGUNF05a_C	Mainstem of Jay Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
COGUNF05b	5b. Mainstem of Roatcap Creek, including all tributaries and wetlands, from the source to the confluence with the North Fork of the Gunnison. Leroux Creek from the national forest boundary to its confluence with the North Fork of the Gunnison River.
Listed portion:	COGUNF05b_B	Mainstem of Leroux Creek from the forest to the confluence with North Fork of the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
COGUNF06a	6a. All tributaries, including wetlands, to the North Fork of the Gunnison River from its inception at the confluence of Muddy Creek and Anthracite Creek to the confluence with the Gunnison River, and not within national forest boundaries, except for the specific listings in Segments 5a, 5b, 6b, and 6c.
Listed portion:	COGUNF06a_B	Unnamed tributary to North Fork Gunnison River near Hotchkiss.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Listed portion:	COGUNF06a_C	Coal Gulch, Hawksnest Creek, and Gribble Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COGUNF06b	6b. Mainstem and all tributaries to Bear Creek and Stevens Gulch. All tributaries, including wetlands, to the North Fork of the Gunnison River that are north of the North Fork of the Gunnison River, from a point immediately above the confluence with Roatcap Creek to the confluence with the Gunnison River, and are not within national forest boundaries; all tributaries, including wetlands, to the North Fork of the Gunnison River that are south of the North Fork of the Gunnison River, from a point immediately above the confluence with Minnesota Creek to the confluence with the Gunnison River, and are not within national forest boundaries, excluding the specific listings in Segments 5a and 5b.
Listed portion:	COGUNF06b_B	Cottonwood Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Water Supply Use	Sulfate	5. - 303(d) List	L
Listed portion:	COGUNF06b_C	Alum Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COGUNF06b_D	Big Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COGUNF06b_E	Short Draw.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COGUNF06b_F	Bell Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COGUNF06b_G	Mainstems, tributaries, and wetlands of Bear, Reynolds, Bell, McDonald, Cow, Denver, German and Miller Creeks; and Love, Stevens, Big and Stingley Gulches that are not within national forest boundaries, from the source to the North Fork of the Gunnison River, excluding the specific listings in Segments 5a and 5b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COGUSM02	2. All tributaries and wetlands, to the San Miguel River from its source to a point immediately below the confluence of Leopard Creek, except for specific listings in Segments 1, 6a, 6b, 7 and 8.
Listed portion:	COGUSM02_B	Bear Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COGUSM02_C	Cornet Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUSM02_D	Howard Fork above Swamp Canyon.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	H
Listed portion:	COGUSM02_E	Muddy Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COGUSM02_F	All tributaries, including all wetlands, to the San Miguel River, from the source to Leopard Creek, excluding Bear Creek, Cornet Creek, Muddy Creek and Howard Fork above Swamp Canyon.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
COGUSM03a	3a. Mainstem of the San Miguel River from its inception at the confluence of Bridal Veil and Ingram Creeks to a point immediately above the confluence of Marshall Creek.
Listed portion:	COGUSM03a_A	Mainstem of the San Miguel River from its inception at the confluence of Bridal Veil and Ingram Creeks to a point immediately above the confluence of Marshall Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COGUSM03b	3b. Mainstem of the San Miguel River from a point immediately above the confluence of Marshall Creek to a point immediately above the confluence of the South Fork San Miguel River.
Listed portion:	COGUSM03b_A	Mainstem of the San Miguel River from a point immediately above the confluence of Marshall Creek to a point immediately above the confluence of the South Fork San Miguel River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Sediment	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COGUSM04a	4a. Mainstem of the San Miguel River from a point immediately above the confluence of the South Fork of the San Miguel River to a point immediately below the CC ditch.
Listed portion:	COGUSM04a_A	Mainstem of the San Miguel River from Leopard Creek to below the CC ditch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUSM04a_B	Mainstem of the San Miguel River from South Fork San Miguel to confluence with Leopard Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
COGUSM06a	6a. Mainstem of Ingram Creek including, all tributaries and wetlands, from the source to the confluence with the San Miguel River.
Listed portion:	COGUSM06a_A	Mainstem of Ingram Creek including, all tributaries and wetlands, from the source to the confluence with the San Miguel River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Manganese (Dissolved)	5. - 303(d) List	M
COGUSM06b	6b. Mainstem of Marshall Creek, including all tributaries and wetlands, from the source to the confluence with the San Miguel River.
Listed portion:	COGUSM06b_A	Mainstem of Marshall Creek, including all tributaries and wetlands, from the source to the confluence with the San Miguel River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
COGUSM07	7. Mainstem of Howard Fork and including tributaries and wetlands, from a point immediately below the confluence of Swamp Gulch to its confluence with the South Fork of the San Miguel River.
Listed portion:	COGUSM07_A	Mainstem of the Howard Fork, all tributaries and wetlands, from the Swamp Gulch to the South Fork of the San Miguel River, excluding the Chapman Creek and the Iron Bog Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Listed portion:	COGUSM07_B	Chapman Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Listed portion:	COGUSM07_C	Iron Bog Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	pH	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COGUSM08	8. Mainstem of the South Fork of the San Miguel River from its inception at the confluence of the Howard and Lake Forks to its confluence with the San Miguel River.
Listed portion:	COGUSM08_A	Mainstem of the South Fork of the San Miguel River from its inception at the confluence of the Howard and Lake Forks to its confluence with the San Miguel River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUSM10b	10b. Mainstem of Naturita Creek and Tabeguache Creek from the point it exits the Uncompahgre National Forest at the most downstream boundary to the confluence with the San Miguel River.
Listed portion:	COGUSM10b_B	Mainstem of Naturita Creek from the national forest to the confluence with the San Miguel River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COGUSM12a	12a. All tributaries and wetlands to Naturita Creek. All tributaries and wetlands to the San Miguel River from a point immediately below the confluence with Leopard Creek to a point immediately above Horsefly Creek. This segment excludes the listings in Segments 9, 11a, 11b, 12b, and 12c.
Listed portion:	COGUSM12a_D	Specie Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUSM12a_E	McKenzie Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
COGUSM12b	12b. All tributaries and wetlands to the San Miguel River from a point immediately above Horsefly Creek to the confluence with the Dolores River, excluding the listings in Segments 9, 11a, 12a, and 12c. Maverick Draw, including all tributaries and wetlands, from its source to the confluence with Naturita Creek.
Listed portion:	COGUSM12b_D	Mainstem of Maverick Draw.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COGUSM12b_F	Coal Canyon and its tributaries, except for the North and South tributaries in Second Park.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COGUSM12b_G	Tuttle Draw and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COGUSM12b_H	Dry Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGUSM12b_I	Second Park Tributary South.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
COGUSM12c	12c. Mainstem of Calamity Draw from Lincoln Street in Nucla (38.264075, -108.555087) to the confluence with the San Miguel River.
Listed portion:	COGUSM12c_A	Calamity Draw below Lincoln Street.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COGUSM14	14. All lakes and reservoirs tributary to the San Miguel River from its source to a point immediately below the confluence of Leopard Creek, except for the specific listings in Segments 13, 15, 16, 17 and 20. This segment includes Lake Hope, Cushman Lake, Alta Lakes, Blue Lake, Mud Lake, and Woods Lake.
Listed portion:	COGUSM14_B	Applebaugh Pond.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
COGUSM20	20. Trout Lake, Gurley Reservoir, Cone Reservoir, and Miramonte Reservoir.
Listed portion:	COGUSM20_B	Miramonte Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen (Temperature)	5. - 303(d) List	H
COGUUG01	1. All tributaries to the Gunnison River, including and wetlands, within the La Garita, Powderhorn, West Elk, Collegiate Peaks, Maroon Bells, Raggeds, Fossil Ridge, or Uncompahgre Wilderness Areas.
Listed portion:	COGUUG01_B	Stewart Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG01_D	All tributaries and wetlands to the Gunnison River within the La Garita, Powderhorn, West Elk, Collegiate Peaks, Maroon Bells, Raggeds, Fossil Ridge, or Uncompahgre Wilderness Areas, excluding Stewart Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG02	2. All tributaries and wetlands from Beaver Creek to Meyers Gulch, from the West Elk Wilderness boundary to their confluences with Blue Mesa Reservoir, Morrow Point Reservoir, or the Gunnison River, excluding Steuben Creek, Willow Creek, and Soap Creek and their tributaries.
Listed portion:	COGUUG02_D	Red Creek and East Elk Creek and their tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
COGUUG04	4. Mainstem of the Taylor River, including all tributaries and wetlands, from the source to the confluence with the Gunnison River, except for specific listings in Segment 1.
Listed portion:	COGUUG04_B	Mainstem of Taylor River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COGUUG05a	5a. Mainstem of the East River, including all tributaries and wetlands, from its source to a point immediately above the confluence with the Slate River, except for specific listings in Segment 1.
Listed portion:	COGUUG05a_A	Mainstem of the East River, including all tributaries and wetlands, from its sources to a point immediately above the confluence with the Slate River, except for specific listings in Segments 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COGUUG06c	6c. Cement Creek, including all tributaries and wetlands, from a point immediately above the confluence with Horse Basin Creek to the confluence with the East River.
Listed portion:	COGUUG06c_A	Cement Creek, including all tributaries and wetlands, from a point immediately above the confluence with Horse Basin Creek to the confluence with the East River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG07	7. Mainstem of the Slate River from its source to a point immediately above the confluence with Coal Creek.
Listed portion:	COGUUG07_A	Mainstem of the Slate River from its source to Oh-Be-Joyful Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG07_B	Mainstem of the Slate River from Oh-Be-Joyful Creek to a point immediately above the confluence with Coal Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
COGUUG08	8. Mainstem of the Slate River from a point immediately above the confluence with Coal Creek to the confluence with the East River.
Listed portion:	COGUUG08_A	Mainstem of the Slate River from a point immediately above the confluence with Coal Creek to the confluence with the East River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COGUUG09	9. All tributaries and wetlands to the Slate River except for specific listings in Segments 1, 10a, 10b, 11, 12 and 13.
Listed portion:	COGUUG09_B	Mainstem of Coal Creek from source to Elk Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGUUG09_C	Mainstem of Washington Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG09_E	All tributaries and wetlands to the Slate River, excluding Coal Creek (above Elk Creek) and Washington Gulch.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGUUG09_G	Drainage from natural iron fen (38.863897, -107.041530) tributary to Coal Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COGUUG10a	10a. Mainstem of Oh-Be-Joyful Creek from the boundary of the Raggeds Wilderness Area to the confluence with the Slate River.
Listed portion:	COGUUG10a_A	Mainstem of Oh-Be-Joyful Creek from the boundary of the Raggeds Wilderness Area to the confluence with the Slate River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COGUUG10b	10b. All tributaries, including wetlands, to Redwell Creek.
Listed portion:	COGUUG10b_A	All tributaries, including wetlands, to Redwell Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COGUUG11	11. Mainstem of Coal Creek from a point immediately above the confluence with Elk Creek to a point immediately above the Keystone Mine discharge (38.867117, -107.023627). Elk Creek and its tributaries and wetlands from its source to its confluence with Coal Creek.
Listed portion:	COGUUG11_B	Elk Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG11_D	Mainstem of Coal Creek from a point immediately above the confluence with Elk Creek to a point immediately above the Keystone discharge (38.867117, -107.023627).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COGUUG12	12. Mainstem of Coal Creek, including all tributaries and wetlands from a point immediately above the Keystone Mine discharge (38.867117, -107.023627) to the confluence with the Slate River, with the exception of Wildcat Creek.
Listed portion:	COGUUG12_C	Mainstem of Coal Creek, from a point immediately below the Keystone discharge (38.867117, -107.023627) to the confluence with the Slate River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGUUG12_D	Unnamed tributary draining Red Lady Basin to Coal Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
COGUUG15a	15a. All tributaries and wetlands to the Gunnison River from its inception at the confluence of the East and Taylor Rivers to the County Road 32 road crossing near the inlet of Blue Mesa Reservoir except for the specific listings in Segments 1, 15b, 16a, 16b, 17 through 24, and 26.
Listed portion:	COGUUG15a_A	All tributaries and wetlands to the Gunnison River from the confluence of the East and Taylor Rivers to the inlet of Blue Mesa Reservoir, excluding South Beaver Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Listed portion:	COGUUG15a_B	Mainstem of South Beaver Creek from Saguache/Gunnison County Line to the confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGUUG16a	16a. Mainstem of Ohio Creek, from the source to a point immediately below 7 Road. All tributaries to Ohio Creek, except for specific listings in Segment 1.
Listed portion:	COGUUG16a_E	Ohio Creek including its tributaries and wetlands, below Baldwin.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COGUUG16a_F	Ohio Creek including its tributaries and wetlands, above Baldwin.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG16b	16b. Mainstem of Ohio Creek from a point immediately below 7 Road to the confluence with the Gunnison River.
Listed portion:	COGUUG16b_A	Mainstem of Ohio Creek from a point immediately below 7 Road to the confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COGUUG17a	17a. West Antelope Creek, including all tributaries and wetlands, from the source to the confluence with Antelope Creek.
Listed portion:	COGUUG17a_A	West Antelope Creek, including all tributaries and wetlands, from the source to the confluence with Antelope Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COGUUG17b	17b. Mainstem of Antelope Creek, including all tributaries and wetlands, from the source to the confluence with the Gunnison River, excluding the listings in Segment 17a.
Listed portion:	COGUUG17b_A	Mainstem of Antelope Creek, including all tributaries and wetlands, from the source to the confluence with the Gunnison River, excluding the listings in Segment 17a.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
COGUUG18a	18a. Mainstem of Tomichi Creek and its wetlands from the source to the confluence with Porphyry Creek.
Listed portion:	COGUUG18a_A	Mainstem of Tomichi Creek and its wetlands from the source to the confluence with Porphyry Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
COGUUG18b	18b. Mainstem of Tomichi Creek and its wetlands from the confluence with Porphyry Creek to the confluence with the Gunnison River.
Listed portion:	COGUUG18b_A	Mainstem of Tomichi Creek and its wetlands from the confluence with Porphyry Creek to the confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Aquatic Life Use	Temperature	5. - 303(d) List	H
COGUUG19	19. All tributaries to Tomichi Creek, including wetlands, which are within the boundaries of the Gunnison National Forest, except for specific listings in Segments 20 through 24. Mainstems of Barret, Razor, and Quartz Creeks from their sources to their confluences with Tomichi Creek. Hot Springs Creek from its source to the inlet of Hot Springs Reservoir.
Listed portion:	COGUUG19_B	Mainstem of Razor Creek from source to confluence with Tomichi Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGUUG21	21. Mainstem of Marshall Creek, including all tributaries and wetlands, from the source to the confluence with Tomichi Creek, except for specific listings in Segment 20.
Listed portion:	COGUUG21_A	Mainstem of Marshall Creek, including all tributaries and wetlands, from the source to the confluence with Tomichi Creek, except for specific listings in Segment 20.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG23	23. Mainstem of Cochetopa Creek, including all tributaries and wetlands, from the source to a point immediately below the confluence with West Pass Creek with the exception of Segment 1.
Listed portion:	COGUUG23_A	All tributaries and wetlands to mainstem Cochetopa Creek, from the sources to a point immediately below the confluence with West Pass Creek, excluding mainstem Cochetopa Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG23_B	Mainstem of Cochetopa Creek from Nutras Creek to West Pass Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG24	24. Mainstem of Cochetopa Creek from a point immediately below the confluence with West Pass Creek to the confluence with Tomichi Creek.
Listed portion:	COGUUG24_A	Mainstem of Cochetopa Creek from West	Pass Creek to Forest	Road 3076/Co. Rd 43.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG24_B	Mainstem of Cochetopa Creek, from Forest Road 3076/Co. Rd 43 to the confluence with Tomichi Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG25	25. The segments of the Gunnison River which interconnect Blue Mesa Reservoir, Morrow Point Reservoir, and Crystal Reservoir.
Listed portion:	COGUUG25_A	The segments of the Gunnison River which interconnect Blue Mesa Reservoir, Morrow Point Reservoir, and Crystal Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG26	26. All tributaries, including wetlands, which are tributary to the Gunnison River from County Road 32 to the inlet of Blue Mesa Reservoir, Blue Mesa Reservoir, Morrow Point Reservoir, Crystal Reservoir, or the segments of the Gunnison River that interconnect those reservoirs, except for specific listings in Segments 1, 2, 29a, 29b, 30, 31, and 32.
Listed portion:	COGUUG26_B	Blue Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG26_C	Mainstem of Crystal Creek from source to confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COGUUG26_D	Willow Creek terminating at Blue Mesa Reservoir near (38.43676, -107.288995) and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUG26_E	All tributaries, including wetlands which are tributary to the Gunnison River from County Road 32 to the inlet of Blue Mesa Reservoir, Blue Mesa Reservoir, Morrow Point Reservoir, Crystal Reservoir or the segments of the Gunnison River that interconnect those reservoirs, except for (specific listings in Segments 1, 2, 29a, 29b, 30, 31, and 32) and the portions of Blue, Willow and Crystal Creeks.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG29a	29a. Mainstem of the Lake Fork of the Gunnison including all tributaries and wetlands, from the source to a point immediately above the confluence with Eaton Creek. Cebolla Creek, including all tributaries and wetlands, from the source to the Hinsdale/Gunnison County line. Powderhorn Creek, including all tributaries and wetlands, from the source to the confluence with Cebolla Creek. This segment excludes the specific listings in Segments 1, 29b, 30, 31, and 32.
Listed portion:	COGUUG29a_B	Deadman Creek/Gulch and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Listed portion:	COGUUG29a_C	Lake Fork of the Gunnison River between Cooper and Silver Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COGUUG29a_D	Lake Fork of the Gunnison above Cooper Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Listed portion:	COGUUG29a_I	Lake Fork of the Gunnison between Silver Creek and Cottonwood Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
COGUUG29b	29b. Mainstem of the Lake Fork of the Gunnison, including all tributaries and wetlands, from a point immediately above the confluence with Eaton Creek, to Blue Mesa Reservoir. Cebolla Creek, including all tributaries and wetlands, from the Hinsdale/Gunnison County line, to Blue Mesa Reservoir, excluding the listings in Segment 29a.
Listed portion:	COGUUG29b_C	Mainstem of the Lake Fork of the Gunnison, including all tributaries and wetlands, from a point immediately above the confluence with Eaton Creek, to Blue Mesa Reservoir. Cebolla Creek, including all tributaries and wetlands, from the Hinsdale/Gunnison County line, to Blue Mesa Reservoir, excluding the listings in Segment 29a and Powderhorn Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUG30	30. Mainstem of Henson Creek, including all tributaries and wetlands, from the source to the confluence with the Lake Fork of the Gunnison, except for the specific listings in Segments 31 and 32.
Listed portion:	COGUUG30_B	Mainstem of Henson Creek from the source to the confluence with the Lake Fork of the Gunnison.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COGUUG30_C	All tributaries and wetlands of Henson Creek, from the source to the confluence with the Lake Fork of the Gunnison, except for the specific listing in Segments 31 and 32.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COGUUG31	31. Mainstem of Palmetto Gulch Creek including all tributaries.
Listed portion:	COGUUG31_B	Mainstem of Palmetto Gulch Creek including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Aquatic Life Use	Manganese (Dissolved)	5. - 303(d) List	L
COGUUG32	32. North Fork of Henson Creek including all tributaries and wetlands, from its source to the confluence with Henson Creek, except for specific listings in Segment 1.
Listed portion:	COGUUG32_A	North Fork of Henson Creek including all tributaries and wetlands, from its source to the confluence with Henson Creek, except for specific listings in Segment 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGUUN02	2. Mainstem of the Uncompahgre River from the source (Poughkeepsie Gulch) to a point immediately above the confluence with Red Mountain Creek.
Listed portion:	COGUUN02_B	Mainstem of the Uncompahgre River from the source (Poughkeepsie Gulch) to a point immediately above the confluence with Silver Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	pH	5. - 303(d) List	H
Listed portion:	COGUUN02_C	Mainstem of the Uncompahgre River from a point immediately above the confluence with Silver Creek to a point immediately above the confluence with Red Mountain Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
COGUUN03a	3a. Mainstem of the Uncompahgre River from a point immediately above the confluence with Red Mountain Creek to a point immediately above the confluence with Cascade Creek.
Listed portion:	COGUUN03a_A	Mainstem of the Uncompahgre River from a point immediately above the confluence with Red Mountain Creek to a point immediately above the confluence with Cascade Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Agricultural Use	Copper (Total)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	pH	5. - 303(d) List	H
COGUUN03b	3b. Mainstem of the Uncompahgre River from a point immediately above the confluence with Cascade Creek to a point immediately above the confluence with Dexter Creek.
Listed portion:	COGUUN03b_A	Mainstem of the Uncompahgre River from a point immediately above the confluence with Cascade Creek to a point immediately above the confluence with Dexter Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	4a. - TMDL	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGUUN03d	3d. Mainstem of the Uncompahgre River from a point immediately below the confluence with Dallas Creek to the inlet of Ridgway Reservoir.
Listed portion:	COGUUN03d_A	Mainstem of the Uncompahgre River from a point immediately below the confluence with Dallas Creek to the inlet of Ridgway Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Total)	4a. - TMDL	N/A
COGUUN04a	4a. Mainstem of the Uncompahgre River from the Highway 90 bridge at Montrose to Gunnison Road.
Listed portion:	COGUUN04a_B	Mainstem of the Uncompahgre River from	Cedar Creek to Gunn	ison Road.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Listed portion:	COGUUN04a_C	Mainstem of the Uncompahgre River from the Highway 90 bridge at Montrose to Cedar Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Sediment	3b. - M&E List	N/A
COGUUN04b	4b. Mainstem of the Uncompahgre River from Gunnison Road to the upstream boundary of Confluence Park.
Listed portion:	COGUUN04b_A	Mainstem of the Uncompahgre River from Gunnison Road to the upstream boundary of Confluence Park.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COGUUN04c	4c. Mainstem of the Uncompahgre River from the upstream boundary of Confluence Park to the confluence with the Gunnison River.
Listed portion:	COGUUN04c_A	Mainstem of the Uncompahgre River from the upstream boundary of Confluence Park to the confluence with the Gunnison River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
COGUUN05	5. All tributaries to the Uncompahgre River, including all wetlands, from the source to a point immediately below the confluence with Dexter Creek, except for specific listings in Segments 1, 6a, 6b, and 7 through 9.
Listed portion:	COGUUN05_B	Commodore Gulch and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Listed portion:	COGUUN05_C	Governor Basin.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Lead (Total)	5. - 303(d) List	L
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	M
Listed portion:	COGUUN05_D	Silver Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Listed portion:	COGUUN05_E	Sneffels Creek below Governor Basin.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	M
Listed portion:	COGUUN05_G	Alaska Basin.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	pH	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Listed portion:	COGUUN05_H	Miner's Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
COGUUN06a	6a. Mainstem of Red Mountain Creek from the source to immediately above the confluence with the East Fork of Red Mountain Creek.
Listed portion:	COGUUN06a_A	Mainstem of Red Mountain Creek from the source to immediately above the confluence with the East Fork of Red Mountain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
COGUUN07	7. Mainstem of Gray Copper Gulch from the source to the c		onfluence with Red M	ountain Creek.
Listed portion:	COGUUN07_A	Mainstem of Gray Copper Gulch from the	source to the conflue	nce with Red Mountain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	M
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
COGUUN08	8. Mainstem of Mineral Creek from the source to the confluence with the Uncompahgre River.
Listed portion:	COGUUN08_A	Mainstem of Mineral Creek from the source to the confluence with the Uncompahgre River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
COGUUN09	9. Mainstem of Imogene Creek from its source to its confluence with Sneffels Creek. Mainstem and all tributaries of Sneffels Creek from a point 1.5 miles above its confluence with Imogene Creek at 37.974979, -107.753960 (WGS84) to its confluence with Imogene Creek. Mainstem of Canyon Creek from its inception at the confluence of Imogene Creek and Sneffels Creek to the confluence with the Uncompahgre River.
Listed portion:	COGUUN09_B	Mainstem and all tributaries of Sneffels Creek from a point 1.5 miles above its confluence with Imogene Creek at 37.974979, -107.753960 (WGS84) to its confluence with Imogene Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Listed portion:	COGUUN09_C	Mainstem of Canyon Creek from its inception at the confluence of Imogene Creek and Sneffels Creek to the confluence with the Uncompahgre River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Listed portion:	COGUUN09_D	Mainstem of Imogene Creek from its source to its confluence with Sneffels Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
COGUUN10a	10a. All tributaries to the Uncompahgre River, including all wetlands, from a point immediately below the confluence with Dexter Creek to the South Canal near Uncompahgre, except for specific listings in Segments 1, 10b, and 11.
Listed portion:	COGUUN10a_B	Alkali Creek and all tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COGUUN10a_C	Mainstem of Cow Creek from the confl	uence of Nate Creek to the Uncompahgre River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUN11	11. Mainstem of Coal Creek from the source to the Park Ditch, mainstem of Dallas Creek from the source of the East and West Forks to the confluence with the Uncompahgre River; mainstem of Cow Creek from the Uncompahgre Wilderness Area boundary to a point immediately below the confluence with Nate Creek, tributaries to Cow Creek from the Uncompahgre Wilderness Area boundary to the confluence with the Uncompahgre River; mainstems of Billy Creek, Onion Creek and Beaton Creek from their sources to their confluences with Uncompahgre River; mainstem of Beaver Creek from the source to the confluence with the East Fork of Dallas Creek; and mainstem of Pleasant Valley Creek from the source to the confluence with Dallas Creek.
Listed portion:	COGUUN11_C	Deer Creek from source to Cow Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUN11_G	Mainstem of Dallas Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUN11_H	Mainstem of Billy Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUN11_I	Mainstems of Coal, Pleasant Valley, and Beaton Creeks.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUN11_J	Onion Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COGUUN11_K	Mainstem of Cow Creek from the wilderness to the confluence with Nate Creek and all tributaries and wetlands of Cow Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COGUUN12	12. All tributaries to the Uncompahgre River, including all wetlands, from the South Canal near Uncompahgre to the confluence with the Gunnison River, except for specific listings in Segments 13, 14, 15a and 15b.
Listed portion:	COGUUN12_C	Mainstem of Dry Creek from Coal bank Canyon Creek to Uncompahgre River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Listed portion:	COGUUN12_D	Loutzenhizer Arroyo and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	5. - 303(d) List	M
Aquatic Life Use	Total Phosphorus	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Listed portion:	COGUUN12_E	All tributaries to the Uncompahgre River, including all wetlands, from the South Canal near Uncompahgre to the confluence with the Gunnison River, except for specific listings in Segments (13, 14, 15a and 15b), Loutzenhizer Arroyo, Dry Creek, Cedar Creek, and Dry Cedar Creek.
Affected Use	Analyte	Category / List	Priority
Agricultural Use	Selenium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COGUUN12_G	Montrose Arroyo from headwaters to confluence with Cedar Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
Agricultural Use	Selenium (Total)	5. - 303(d) List	M
Listed portion:	COGUUN12_H	Cedar Creek and Dry Cedar Creek with their tributaries, except Montrose Arroyo.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	4a. - TMDL	N/A
COGUUN15b	15b. Mainstem of Dry Creek from the confluence of the East and West Forks to immediately above the confluence with Coalbank Canyon Creek.
Listed portion:	COGUUN15b_A	Mainstem of Dry Creek from the confluence of the East and West Forks to immediately above the confluence with Coalbank Canyon Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
COGUUN19	19. Ridgway Reservoir.
Listed portion:	COGUUN19_A	Ridgway Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
COGUUN20	20. Sweitzer Lake (a.k.a. Garnet Mesa Reservoir).
Listed portion:	COGUUN20_A	Sweitzer Lake (a.k.a. Garnet Mesa Reservoir).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COLCLC01	1. Mainstem of the Colorado River from the confluence with the Roaring Fork River to immediately below the confluence with Rifle Creek.
Listed portion:	COLCLC01_A	Colorado River from Paradise Creek to below the confluence with Rifle Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COLCLC01_B	Colorado River from Roaring Fork to Paradise Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Water Supply Use	Chloride	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC02a	2a. Mainstem of the Colorado River from immediately below the confluence with Rifle Creek to immediately above the confluence of Rapid Creek.
Listed portion:	COLCLC02a_A	Mainstem of the Colorado River from immediately below the confluence with Rifle Creek to immediately above the confluence of Rapid Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC02b	2b. Mainstem of the Colorado River from a point immediately above the confluence with Rapid Creek to immediately above the confluence of the Gunnison River.
Listed portion:	COLCLC02b_A	Mainstem of the Colorado River from Rapid Creek to Gunnison River except for the Humphrey Backwater area.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Listed portion:	COLCLC02b_B	Humphrey Backwater area.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Aquatic Life Use	Nitrite	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COLCLC03	3. Mainstem of the Colorado River from immediately above the confluence of the Gunnison River to the Colorado-Utah state line.
Listed portion:	COLCLC03_C	Mainstem of the Colorado River from above Reed Wash to the Colorado-Utah state line.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COLCLC04a	4a. All tributaries, including wetlands, to the Colorado River from the confluence with the Roaring Fork River to below the confluence with Parachute Creek except for listings in Segments 4b, 4c, 4d, 4e, 5, 6, 7a, 7b, 8, 9a, 9c, 10, 11a ? c.
Listed portion:	COLCLC04a_A	Tributaries to Colorado River, Roaring Fork to Parachute Creek, except for Mamm Creek and Alkali Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Listed portion:	COLCLC04a_B	Mamm Creek and its East, Middle, and West Mamm Creek tributaries from the sources to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Agricultural Use	Selenium (Total)	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Listed portion:	COLCLC04a_C	Alkali Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Listed portion:	COLCLC04a_D	South Canyon Creek sections above hot springs.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COLCLC04b	4b. South Canyon Hot Springs (39.552964, -107.414232).
Listed portion:	COLCLC04b_A	South Canyon Hot Springs. (39.552964, -107.414232).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
COLCLC04c	4c. The mainstem of South Canyon Creek from the South Canyon Hot Springs to the confluence with the Colorado River.
Listed portion:	COLCLC04c_A	South Canyon Creek from South Canyon Hot Springs to Colorado River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC04e	4e. Mainstem of Dry Creek, including all tributaries and wetlands, from the source to immediately above the Last Chance Ditch.
Listed portion:	COLCLC04e_A	Mainstem of Dry Creek, including all tributaries and wetlands, from the source to immediately above the Last Chance Ditch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
COLCLC07a	7a. Mainstem of Mitchell, Canyon, Elk, Garfield, Beaver, and Cache Creeks, including all tributaries and wetlands, from the boundary of the White River National Forest to their confluences with the Colorado River.
Listed portion:	COLCLC07a_B	Mainstem of Mitchell, Canyon, Beaver, and Cache Creeks, including all tributaries and wetlands, from the boundary of the White River National Forest to their confluences with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COLCLC07a_C	Garfield Creek and its tributaries from the headwaters to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COLCLC07a_D	Elk Creek and its tributaries from the White River National Forest boundary to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
COLCLC07b	7b. Mainstem of Divide Creek, including all tributaries and wetlands, from the boundary of the White River National Forest to the confluence with the Colorado River.
Listed portion:	COLCLC07b_A	Mainstem of Divide Creek, including all tributaries and wetlands, from the boundary of the White River National Forest to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COLCLC10	10. West Rifle Creek, including all tributaries and wetlands, from the source to Rifle Gap Reservoir. East Rifle Creek, including all tributaries and wetlands, from the White River National Forest boundary to Rifle Gap Reservoir. Rifle Creek, including all tributaries and wetlands, from Rifle Gap Reservoir to the confluence with the Colorado River.
Listed portion:	COLCLC10_A	East Rifle Creek from the White River NF boundary to Rifle Gap Reservoir. Rifle Creek from Rifle Gap Reservoir to the Colorado River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Listed portion:	COLCLC10_B	West Rifle Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC11c	11c. Mainstem of Parachute Creek from the confluence of the West and East Forks to the confluence with the Colorado River. All tributaries and wetlands to Parachute Creek on the west side of Parachute Creek from the confluence of the East and West Forks to the confluence with the Colorado River.
Listed portion:	COLCLC11c_B	Mainstem of Parachute Creek from the confluence of the West and East Forks to the confluence with the Colorado River. All tributaries and wetlands to Parachute Creek on the west side of Parachute Creek from the confluence of the East and West Forks to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Cadmium (Total)	5. - 303(d) List	H
COLCLC13a	13a. All tributaries to the Colorado River including wetlands, from a point immediately below the confluence of Roan Creek to the Colorado/Utah border, except for listings in Segments 13b through 19.
Listed portion:	COLCLC13a_A	All tributaries to the Colorado River, including wetlands,from a point immediately below the confluence of Roan Creek to the Colorado/Utah border, except for listings in Segments 13b through 19.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Nitrite	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Listed portion:	COLCLC13a_B	Sulphur Gulch and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
COLCLC13b	13b. All tributaries to the Colorado River, including wetlands, from the Government Highline Canal Diversion to a point immediately below Salt Creek, and downgradient from the Government Highline Canal, the Orchard Mesa Canal No. 2, Orchard Mesa Drain, Stub Ditch and the northeast Colorado National Monument boundary.
Listed portion:	COLCLC13b_B	Salt Creek and tributaries below lake and reservoir, including Mack Wash.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COLCLC13b_C	Adobe Creek, Leach Creek and tributaries below canal.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COLCLC13b_D	Indian Wash.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COLCLC13b_E	Unnamed tributary to the Colorado River from its source to its confluence with the Colorado River near 39.081, -108.592.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COLCLC13b_F	All tributaries to the Colorado River from Government Highline Canal Diversion to below Salt Creek, and downgradient from Government Highline Canal, Orchard Mesa Canal No. 2, Orchard Mesa Drain, Stub Ditch and northeast Colorado National Monument boundary, except Salt, Adobe, Leach Creeks, Indian Wash, Unnamed Tributary and Mack Wash.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Nitrite	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
COLCLC14b	14b. Clear Creek, including all tributaries and wetlands, from a point immediately below the confluence with Tom Creek to the confluence with Roan Creek. Roan Creek, including all tributaries and wetlands, from a point immediately above the confluence with Clear Creek to a point immediately below the confluence with Kimball Creek.
Listed portion:	COLCLC14b_A	Clear Creek, including all tributaries and wetlands, from a point immediately below the confluence with Tom Creek to the confluence with Roan Creek. Roan Creek, including all tributaries and wetlands, from a point immediately above the confluence with Clear Creek to a point immediately below the confluence with Kimball Creek
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COLCLC14c	14c. Mainstem of Roan Creek, including all tributaries and wetlands, from a point immediately below the confluence with Kimball Creek to the confluence with the Colorado River.
Listed portion:	COLCLC14c_B	North, South and mainstem of Dry Fork including tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Listed portion:	COLCLC14c_C	Roan Creek and tributaries including Conn Cr, Logan Wash, Bloat Gulch and Gibler Gulch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COLCLC15a	15a. Mainstem of Plateau Creek from its source to the inlet of Vega Reservoir. All tributaries and wetlands to Plateau Creek from its source to a point immediately above the confluence with Buzzard Creek. Kimball Creek, Grove Creek, Big Creek, Cottonwood Creek, Bull Creek, Spring Creek, Coon Creek, and Mesa Creek, including all wetlands and tributaries, from their sources to their confluences with Plateau Creek. The mainstem of Buzzard Creek, including all tributaries and wetlands, within the Grand Mesa National Forest.
Listed portion:	COLCLC15a_A	Mainstem of Plateau Creek from its source to the inlet of Vega Reservoir. All tributaries and wetlands to Plateau Creek from its source to a point immediately above the confluence with Buzzard Creek. Kimball Creek, Grove Creek, Big Creek, Cottonwood Creek, Bull Creek, Spring Creek, Coon Creek, and Mesa Creek, including all wetlands and tributaries, from their sources to their confluences with Plateau Creek. The mainstem of Buzzard Creek, including all tributaries and wetlands, within the Grand Mesa National Forest.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC15c	15c. Mainstem of Plateau Creek from the outlet of Vega Reservoir to a point immediately below the confluence with Buzzard Creek.
Listed portion:	COLCLC15c_A	Mainstem of Plateau Creek from the outlet of Vega Reservoir to a point immediately below the confluence with Buzzard Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC15d	15d. Mainstem of Buzzard Creek from the Grand Mesa National Forest boundary to its confluence with Plateau Creek.
Listed portion:	COLCLC15d_A	Mainstem of Buzzard Creek from the Grand Mesa National Forest boundary to its confluence with Plateau Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC16	16. Plateau Creek including all tributaries and wetlands, from a point immediately below the confluence with Buzzard Creek, to the confluence with the Colorado River, excluding listings in segments 5, 15a and 21.
Listed portion:	COLCLC16_A	Plateau Creek including all tributaries and wetlands, from a point immediately below the confluence with Buzzard Creek, to the confluence with the Colorado River, excluding specific listings in segment 5, 15a, and 21.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC17a	17a. Rapid Creek, including all tributaries and wetlands, from its source to below the confluence with Cottonwood Creek (39.130512, -108.301028), including Kruzen Springs.
Listed portion:	COLCLC17a_A	Rapid Creek, including all tributaries and wetlands, from its source to below the confluence with Cottonwood Creek (39.130512, -108.301028) including Kruzen Springs.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCLC19	19. All lakes and reservoirs tributary to the Colorado River from a point immediately below the confluence of the Colorado River and Parachute Creek to the Colorado-Utah border, except for listings in segments 9b, 13c, 20, and 21. This segment includes Highline Reservoir.
Listed portion:	COLCLC19_E	West Lake in James M. Robb Colorado River State Park.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COLCLC20	20. Rifle Gap Reservoir, Harvey Gap Reservoir, and Vega Reservoir.
Listed portion:	COLCLC20_B	Rifle Gap Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COLCLC20_C	Harvey Gap Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COLCLC20_D	Vega Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COLCLY02	2. Mainstem of the Yampa River from a point immediately below the confluence with Elkhead Creek to the confluence with the Green River.
Listed portion:	COLCLY02_C	Mainstem of the Yampa River from a point immediately below the confluence with Little Snake River to the confluence with the Green River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COLCLY03c	3c. Mainstem of Milk Creek, including all tributaries and wetlands, from Thornburgh (County Rd 15) to the confluence with the Yampa River, except for listings in Segment 3b and 3e.
Listed portion:	COLCLY03c_B	Wilson Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COLCLY03c_C	Stinking Gulch and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
COLCLY03e	3e. Mainstem of Good Spring Creek and its tributaries above Wilson Reservoir.
Listed portion:	COLCLY03e_A	Mainstem of Good Spring Creek and its tributaries above Wilson Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
COLCLY03i	3i. Lower Johnson Gulch from the confluence with Pyeatt Gulch at CO 107 to the confluence with the Yampa River.
Listed portion:	COLCLY03i_A	Lower Johnson Gulch from the confluence with Pyeatt Gulch at CO 107 to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
COLCLY05	5. Mainstem of Fortification Creek from the confluence of the North Fork and South Fork to the confluence with the Yampa River.
Listed portion:	COLCLY05_A	Mainstem of Fortification Creek from the confluence of the North Fork and South Fork to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COLCLY06	6. All tributaries to Fortification Creek, including all wetlands, from the confluence of the North and South Forks to the confluence with the Yampa River, except for listings in Segments 4 and 7.
Listed portion:	COLCLY06_A	All tributaries to Fortification Creek, including all wetlands, from the confluence of the North and South Forks to the confluence with the Yampa River, except for listings in Segments 4 and 7.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
COLCLY12a	12a. Mainstem of the South Fork of the Williams Fork River and Beaver Creek, including all tributaries and wetlands, from the boundary of Routt National Forest to their mouths. Milk Creek, including all tributaries and wetlands, from the source to a point just below the confluence with Clear Creek. Morapos Creek, including all wetlands and tributaries, from the source to the confluence with the Williams Fork River.
Listed portion:	COLCLY12a_B	Mainstem of the South Fork of the Williams Fork River and Beaver Creek, including all tributaries and wetlands, from the boundary of Routt National Forest to their mouths. Milk Creek, including all tributaries and wetlands, from the source to a point just below the confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Listed portion:	COLCLY12a_C	Morapos Creek, including all wetlands and tributaries, from the source to the confluence with the Williams Fork River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COLCLY16	16. Mainstem of the Little Snake River from a point immediately above the confluence with Powder Wash to the confluence with the Yampa River.
Listed portion:	COLCLY16_A	Mainstem of the Little Snake River from a point immediately above the confluence with Powder Wash to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
COLCLY22c	22c. Mainstem of Vermillion Creek from HWY 318 to the confluence with the Green River.
Listed portion:	COLCLY22c_A	Mainstem of Vermillion Creek from HWY 318 to the confluence with the Green River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COLCWH03	3. Mainstem of the North Fork of the White River and mainstem of the White River from the Flat Tops Wilderness Area boundary to a point immediately above the confluence with Miller Creek.
Listed portion:	COLCWH03_A	Mainstem of the North Fork of the White River and mainstem of the White River from the Flat Tops Wilderness Area boundary to a point immediately above the confluence with Miller Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COLCWH04a	4a. All tributaries to the North Fork White River, including all wetlands, from the Flat Tops Wilderness Area boundary to the confluence with the South Fork White River, except for listings in Segment 1 and 4b.
Listed portion:	COLCWH04a_A	All tributaries to the North Fork White River, including all wetlands, from the Flat Tops Wilderness Area boundary to the confluence with the South Fork White River except for listings in Segment 1 and 4b.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCWH04b	4b. Lost Creek, including tributaries and wetlands, from the source to the confluence with the North Fork White River. Snell Creek, including all wetlands and tributaries, from the source to the confluence with the North Fork White River.
Listed portion:	COLCWH04b_A	Mainstems of Lost Creek and Snell Creek, including all wetlands and tributaries, from the Flat Tops Wilderness area to the boundary of the White River National Forest.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COLCWH07	7. Mainstem of the White River from a point immediately above the confluence with Miller Creek to a point immediately above the confluence with Piceance Creek.
Listed portion:	COLCWH07_B	White River below Meeker to the confluence with Piceance Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCWH09b	9b. All tributaries to the White River, including wetlands, from a point immediately above the confluence with Flag Creek, to a point immediately above the confluence with Piceance Creek, which are not within the boundary of National Forest lands, except for listings in segments 9c and 9d.
Listed portion:	COLCWH09b_A	Tributaries to the White River from above the confluence with Flag Creek, to above the confluence with Piceance Creek, which are not within the boundary of National Forest lands, except for listings in segment 9c and 9d.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Sulfate	3b. - M&E List	N/A
COLCWH09d	9d. Sulphur Creek, including all tributaries and wetlands, from the source to the confluence with the White River. Flag Creek, including all tributaries and wetlands, from a point just below the confluence with the East Fork of Flag Creek to the confluence with the White River.
Listed portion:	COLCWH09d_A	Sulphur Creek, including all tributaries and wetlands, from the source to the confluence with the White River. Flag Creek, including all tributaries and wetlands, from a point just below the confluence with the East Fork of Flag Creek to the confluence with the White River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COLCWH11	11. Rio Blanco Lake and Taylor Draw Reservoir (a.k.a. Kenney Reservoir).
Listed portion:	COLCWH11_A	Taylor Draw Reservoir (a.k.a. Kenney Reservoir).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COLCWH11_B	Rio Blanco Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COLCWH12	12. Mainstem of the White River from a point immediately above the confluence with Piceance Creek to a point immediately above the confluence with Douglas Creek.
Listed portion:	COLCWH12_A	Mainstem of the White River from a point immediately above the confluence with Piceance Creek to a point immediately above the confluence with Douglas Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCWH13b	13b. Mainstem of Yellow Creek including all wetlands from the source to immediately below the confluence with Barcus Creek. All tributaries to Yellow Creek from the source to the White River, including wetlands.
Listed portion:	COLCWH13b_A	Yellow Creek from source to below the confluence with Barcus Creek. Tributaries to Yellow Creek from the source to the White River, except for Corral Gulch and tributaries, Stake Springs Draw and tributaries above Stake Springs and Duck Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	M
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Listed portion:	COLCWH13b_B	Corral Gulch and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Sediment	5. - 303(d) List	M
Listed portion:	COLCWH13b_C	Stake Springs Draw and tributaries above Stake Springs.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Aquatic Life Use	Sediment	5. - 303(d) List	M
Listed portion:	COLCWH13b_D	Duck Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Sediment	5. - 303(d) List	M
COLCWH13c	13c. Mainstem of Yellow Creek, including all wetlands from immediately below the confluence with Barcus Creek to the confluence with the White River.
Listed portion:	COLCWH13c_A	Yellow Creek from immediately below the confluence with Barcus Creek to the confluence with Greasewood Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Listed portion:	COLCWH13c_B	Yellow Creek below Greasewood Creek to the confluence with the White River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	M
COLCWH14a	14a. Mainstem of Piceance Creek from the source to a point just below the confluence with Hunter Creek.
Listed portion:	COLCWH14a_A	Piceance Creek from the source to below confluence with Willow Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COLCWH14a_B	Piceance Creek from Willow Creek to Hunter Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COLCWH15	15. Mainstem of Piceance Creek from a point just below the confluence with Ryan Gulch to the confluence with the White River. The Dry Fork of Piceance Creek, including all tributaries and wetlands, from a point just below the confluence with Little Reigan Gulch to the confluence with Piceance Creek, except for listings in Segment 18.
Listed portion:	COLCWH15_B	Mainstem of Piceance Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COLCWH15_C	Piceance Creek from 3 miles above the confluence with White River, to the confluence with White River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	M
COLCWH16b	16b. All tributaries to Piceance Creek, including all wetlands, from a point immediately below the confluence with Dry Thirteenmile Creek to the confluence with the White River, except for listings in Segments 15, 17, 18a, 18b, 19 and 20.
Listed portion:	COLCWH16b_B	Ryan Gulch and tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COLCWH20	20. Mainstem of Black Sulphur Creek, including all tributaries and wetlands, from the source to the confluence with Piceance Creek, except for the listing in Segment 19.
Listed portion:	COLCWH20_B	Mainstem of Black Sulphur Creek from source to Piceance Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COLCWH20_C	All Tributaries of Black Sulphur Creek from source to Piceance Creek, except for the listing in Segment 19.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCWH21	21. Mainstem of the White River from a point immediately above the confluence with Douglas Creek to the Colorado/Utah border.
Listed portion:	COLCWH21_A	Mainstem of the White River from a point immediately above the confluence with Douglas Creek to the Colorado/Utah border.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COLCWH22	22. All tributaries to the White River, including all wetlands, from a point immediately above the confluence with Douglas Creek to the Colorado/Utah border, except for specific listings in Segment 23.
Listed portion:	COLCWH22_B	West Evacuation Wash with tributaries and Douglas Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	L
COLCWH23	23. Mainstems of East Douglas Creek and West Douglas Creek, including all tributaries and wetlands, from their sources to their confluence.
Listed portion:	COLCWH23_A	West Douglas Creek from its source to confluence.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COLCWH23_B	East Douglas creek from the point below Tommy's Draw a point above its confluence with Douglas Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Aquatic Life Use	Sediment	5. - 303(d) List	H
Listed portion:	COLCWH23_C	Mainstem of East Douglas Creek and tributaries from the source to a point below Tommy's Draw.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COLCWH24	24. All lakes and reservoirs tributary to the White River, which are within the boundaries of the Flat Tops Wilderness Area, including Trappers Lake.
Listed portion:	COLCWH24_C	Ned Wilson Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COLCWH25	25. Lake Avery (a.k.a Big Beaver Reservoir).
Listed portion:	COLCWH25_A	Lake Avery (a.k.a Big Beaver Reservoir).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGAL02	2. Mainstem of the Alamosa River, including all tributaries and wetlands, from the source to immediately above the confluence with Alum Creek, except for specific listings in segments 1, 4a, and 4b. Tributaries to the Alamosa River from a point immediately below the confluence of Bitter Creek to the inlet of Terrace Reservoir, except for specific listings in segments 4a, 5, 6, and 7.
Listed portion:	CORGAL02_B	Mainstem of the Alamosa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGAL02_C	All tributaries and wetlands of the Alamosa River, from the source to immediately above the confluence with Alum Creek, except for tributaries to lower Iron Creek and specific listings in segments 1, 4a, and 4b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGAL02_D	Tributaries to the Alamosa River from a point immediately below the confluence of Bitter Creek to the inlet of Terrace Reservoir, except for specific listings in segments 4a, 5, 6, and 7.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
CORGAL03a	3a. Mainstem of the Alamosa River from immediately above the confluence with Alum Creek to immediately above the confluence of Wightman Fork.
Listed portion:	CORGAL03a_A	Mainstem of the Alamosa River from immediately above the confluence with Alum Creek to immediately above the confluence of Wightman Fork.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
CORGAL03b	3b. Mainstem of the Alamosa River from immediately above the confluence with Wightman Fork to immediately above the confluence with Fern Creek.
Listed portion:	CORGAL03b_A	Mainstem of the Alamosa River from immediately above the confluence with Jasper Creek to immediately above the confluence with Fern Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Listed portion:	CORGAL03b_B	Mainstem of the Alamosa River from immediately above the confluence with the Wightman Fork to Jasper Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
CORGAL03c	3c. Mainstem of the Alamosa River from immediately above the confluence with Fern Creek to immediately below the confluence with Ranger Creek.
Listed portion:	CORGAL03c_A	Mainstem of the Alamosa River from immediately above the confluence with Fern Creek to immediately below the confluence with Ranger Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
CORGAL03d	3d. Mainstem of the Alamosa River from immediately below the confluence with Ranger Creek to the inlet of Terrace Reservoir.
Listed portion:	CORGAL03d_A	Mainstem of the Alamosa River from immediately below the confluence with Ranger Creek to the inlet of Terrace Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Aluminum (Total)	5. - 303(d) List	H
CORGAL05	5. Mainstem of Wightman Fork, including all tributaries and wetlands, from the source to the west line of S30, T37N, R4E (37.43127, -106.60325).
Listed portion:	CORGAL05_A	Mainstem of Wightman Fork from the source to the west line of S30, T37N, R4E, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	4a. - TMDL	N/A
CORGAL07	7. Jasper Creek, including all tributaries and wetlands, from the source to the confluence with the Alamosa River.
Listed portion:	CORGAL07_A	Jasper Creek, including all tributaries and wetlands, from the source to the confluence with the Alamosa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Nickel (Total)	3b. - M&E List	N/A
CORGAL08	8. Terrace Reservoir.
Listed portion:	CORGAL08_A	Terrace Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Total)	4a. - TMDL	N/A
CORGAL09	9. Mainstem of Alamosa River from the outlet of Terrace Reservoir to Hwy 15 (Gunbarrel Road).
Listed portion:	CORGAL09_A	Mainstem of Alamosa River from the outlet of Terrace Reservoir to Hwy 15 (Gunbarrel Road).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
CORGAL10	10. Mainstem of the Alamosa River from Hwy 15 (Gunbarrel Road) to its point of final diversion.
Listed portion:	CORGAL10_A	Mainstem of the Alamosa River from Hwy 15 (Gunbarrel Road) to its point of final diversion.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provision	al) 5. - 303(d) List	M
CORGAL11b	11b. Mainstem of La Jara Creek from the outlet of La Jara Reservoir to a point immediately above the confluence with Hot Creek. All tributaries and wetlands to La Jara Creek from a point immediately below the confluence with Jarosa Creek to a point immediately above the confluence with Hot Creek.
Listed portion:	CORGAL11b_A	Mainstem of La Jara Creek from the outlet of La Jara Reservoir to a point immediately above the confluence with Hot Creek. All tributaries, including wetlands, to La Jara Creek from a point immediately below the confluence with Jarosa Creek to a point immediately above the confluence with Hot Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
CORGAL12	12. Mainstem of La Jara Creek from immediately above the confluence with Hot Creek to the confluence with the Rio Grande.
Listed portion:	CORGAL12_A	Mainstem of La Jara Creek from immediately above the confluence with Hot Creek to the confluence with the Rio Grande.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
CORGAL13	13. Mainstem of Hot Creek from the source to the confluence with La Jara Creek.
Listed portion:	CORGAL13_A	Mainstem of Hot Creek from the source to the confluence with La Jara Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
CORGAL14a	14a. Mainstem of the Conejos River, including all tributaries and wetlands, from the source to immediately below the confluence with Elk Creek, excluding the specific listings in segment 1.
Listed portion:	CORGAL14a_B	La Manga Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGAL25	25. All lakes and reservoirs tributary to La Jara Creek from the source to a point immediately above the confluence with Hot Creek.
Listed portion:	CORGAL25_B	La Jara Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
CORGAL30	30. Platoro Reservoir.
Listed portion:	CORGAL30_A	Platoro Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
CORGCB02a	2a. Mainstem of La Garita Creek, including all tributaries and wetlands, from the source to a point immediately below the confluence with Geronimo Creek. The North, Middle, and South Forks of Carnero Creek, including all tributaries and wetlands, from their sources to their confluences at the inception of the mainstem of Carnero Creek.
Listed portion:	CORGCB02a_B	North Fork of Carnero Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGCB02a_C	South Fork of Carnero Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGCB02b	2b. Mainstem of La Garita Creek, including all tributaries and wetlands, from a point immediately below the confluence with Geronimo Creek to 38 Road. All tributaries to the mainstem of Carnero Creek from its inception at the confluence of the North, Middle, and South Forks to 42 Road, excluding the specific listings in segment 2a.
Listed portion:	CORGCB02b_B	Mainstem of La Garita Creek, including all tributaries and wetlands, from a point immediately below the confluence with Geronimo Creek to 38 Road.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGCB02c	2c. Mainstem of Carnero Creek from its inception at the confluence of the North, Middle, and South Forks to 42 Road.
Listed portion:	CORGCB02c_A	Mainstem of Carnero Creek from its inception at the confluence of the North, Middle, and South Forks to 42 Road.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGCB03	3. All tributaries to the Closed Basin excluding the listings in segments 1, 2a, 2b, 2c, and 4 through 13.
Listed portion:	CORGCB03_B	Cottonwood Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Listed portion:	CORGCB03_C	Major Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Listed portion:	CORGCB03_D	Willow Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
CORGCB04	4. Mainstem of San Luis Creek, including all tributaries and wetlands, from the source to a point immediately below the confluence with Piney Creek, excluding the specific listings in segments 8, 9a, and 9b. Garner Creek, including all tributaries and wetlands, from the Rio Grande Forest Boundary to the mouth.
Listed portion:	CORGCB04_A	Mainstem of San Luis Creek, including all tributaries and wetlands, from the source to a point immediately below the confluence with Piney Creek, excluding the specific listings in segments 8, 9a and 9b. Garner Creek, including all tributaries and wetlands, from the Rio Grande Forest Boundary to the mouth.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
CORGCB05	5. Mainstem of San Luis Creek from a point immediately below the confluence with Piney Creek to the inlet to San Luis Lake.
Listed portion:	CORGCB05_A	Mainstem of San Luis Creek from a point immediately below the confluence with Piney Creek to the inlet to San Luis Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
CORGCB09a	9a. Mainstem of Kerber Creek, including all tributaries and wetlands, from a point immediately above the Cocomongo Mill site to immediately above the confluence of Brewery Creek, excluding the specific listings in segment 8.
Listed portion:	CORGCB09a_A	Mainstem, tributaries and wetlands of Kerber Creek, including all tributaries and wetlands,from the source to immediately above the confluence of Brewery Creek, except for Squirrel Creek and excluding the specific listings in segment 8.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Silver (Total)	4a. - TMDL	N/A
Water Supply Use	Cadmium (Total)	4a. - TMDL	N/A
Water Supply Use	Lead (Total)	4a. - TMDL	N/A
Water Supply Use	pH	4a. - TMDL	N/A
Listed portion:	CORGCB09a_B	Squirrel Creek from a point immediately below the confluence with Bear Creek to the confluence with Kerber Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Silver (Total)	4a. - TMDL	N/A
Water Supply Use	Lead (Total)	4a. - TMDL	N/A
Water Supply Use	Cadmium (Total)	4a. - TMDL	N/A
Water Supply Use	pH	4a. - TMDL	N/A
CORGCB09b	9b. Mainstem of Kerber Creek from a point immediately above the confluence with Brewery Creek to the confluence with San Luis Creek.
Listed portion:	CORGCB09b_A	Mainstem of Kerber Creek from a point immediately above the confluence with Brewery Creek to the confluence with U S Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	CORGCB09b_B	Mainstem of Kerber Creek from a point immediately above the confluence with U S Gulch to the confluence with San Luis Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
CORGCB10	10. Mainstem of Sand Creek, including all tributaries and wetlands, from the source to the mouth. Mainstem of Medano Creek, including all tributaries and wetlands, from the source to the mouth.
Listed portion:	CORGCB10_B	Mainstem of Sand Creek, including all tributaries and wetlands, from the source to the mouth.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
CORGCB12a	12a. Mainstem of Saguache Creek, including all tributaries and wetlands, from the boundary of the La Garita Wilderness Area to a point just below the confluence with Ford Creek, excluding the specific listings in segments 1 and 12b.
Listed portion:	CORGCB12a_B	East Pass Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	H
Listed portion:	CORGCB12a_C	Ford Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Listed portion:	CORGCB12a_F	Mainstem of Saguache Creek from the boundary of the La Garita Wilderness Area to a point just below the confluence with Ford Creek, excluding the specific listings in segment 12b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
CORGCB12b	12b. Mainstem of Saguache Creek from a point just below the confluence of Fourmile Creek to a point just below the confluence with Ford Creek.
Listed portion:	CORGCB12b_B	Mainstem of Saguache Creek from a point just below the confluence of Fourmile Creek to a point just below the confluence with Ford Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Total Phosphorus	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
CORGCB12c	12c. Mainstem of Saguache Creek, including all tributaries and wetlands, from a point just below the confluence with Ford Creek to Hwy 285.
Listed portion:	CORGCB12c_A	Mainstem of Saguache Creek, including all tributaries and wetlands, from a point just below the confluence with Ford Creek to Hwy 285.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
CORGCB13	13. Mainstem of Saguache Creek from Hwy 285 to the confluence with San Luis Creek. Mainstem of Russell Creek from its source at Russell Springs to the confluence with La Garita Creek. Mainstem of Cottonwood Creek downstream of the Rio Grande National Forest Boundary.
Listed portion:	CORGCB13_A	Mainstem of Saguache Creek from Hwy 285 to the confluence with San Luis Creek. Mainstem of Russel Creek. Mainstem of Cottonwood Creek downstream of the Rio Grande National Forest Boundary.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
CORGCB19	19. San Luis Lake.
Listed portion:	CORGCB19_A	San Luis Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Ammonia	5. - 303(d) List	H
CORGRG02	2. Mainstem of the Rio Grande, including all tributaries and wetlands, from the source to a point immediately above the confluence with Willow Creek, excluding the listings in segments 1 and 3.
Listed portion:	CORGRG02_B	South Clear Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGRG02_D	Mainstem of Seepage Creek from the outlet of Santa Maria Reservoir to a point one mile below the outlet of Santa Maria Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Listed portion:	CORGRG02_E	Mainstem and tributaries of the Rio Grande from the source to Rio Grande Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGRG02_F	Mainstem of the Rio Grande from the outlet of Rio Grande Reservoir to the confluence of Squaw Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Listed portion:	CORGRG02_G	Mainstem and Tributaries of the Rio Grand from Squaw Creek to Willow Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGRG03	3. Mainstem of North Clear Creek from the outlet of Continental Reservoir to a point immediately above the confluence with Rito Hondo Creek.
Listed portion:	CORGRG03_B	Mainstem of North Clear Creek from the outlet of Continental Reservoir to a point immediately above the confluence with Rito Hondo Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
CORGRG04a	4a. Mainstem of the Rio Grande from a point immediately above the confluence with Willow Creek to a point immediately above the confluence with the South Fork Rio Grande.
Listed portion:	CORGRG04a_B	Mainstem of the Rio Grande from a point immediately above the confluence with Willow Creek to Blue Creek at Wagon Wheel Gap.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	CORGRG04a_C	Mainstem of the Rio Grande from a point immediately below the confluence with Blue Creek at Wagon Wheel Gap to a point immediately above the confluence with the South Fork Rio Grande.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
CORGRG04b	4b. Mainstem of the Rio Grande from a point immediately above the confluence with South Fork Rio Grande to the Hwy 285 crossing.
Listed portion:	CORGRG04b_B	Mainstem of the Rio Grande from Del Norte to the Hwy 285 crossing.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGRG04b_C	Mainstem of the Rio Grande from a point immediately above the confluence with Pinos Creek to Del Norte.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGRG04b_D	Mainstem of the Rio Grande from the confluence of South Fork to a point immediately above the confluence with Pinos Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
CORGRG04c	4c. Mainstem of the Rio Grande from the Hwy 285 crossing to the Rio Grande/Alamosa County line.
Listed portion:	CORGRG04c_A	Mainstem of the Rio Grande from the Hwy 285 crossing to the Rio Grande/Alamosa County line.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
CORGRG05a	5a. All tributaries to the Rio Grande, including all wetlands, from immediately above the confluence with Willow Creek to the Hwy 112 bridge near Del Norte, excluding the listings in segments 5b through 10.
Listed portion:	CORGRG05a_A	Nelson Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	CORGRG05a_B	Embargo Creek, including all tributaries and wetlands, from the source to immediately above the confluence with Dyers Creek. West Alder Creek, including all tributaries and wetlands.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGRG05b	5b. Mainstem of Alder Creek. Mainstem of East Alder Creek, including all tributaries and wetlands, from the source to the confluence with Alder Creek. Mainstem of Agua Ramon Creek, including all tributaries and wetlands, from the source to the confluence with the Rio Grande. Mainstem of Embargo Creek, including all tributaries and wetlands, from immediately above the confluence with Dyers Creek to the confluence with the Rio Grande.
Listed portion:	CORGRG05b_B	Mainstem of Embargo Creek, including all tributaries and wetlands, from immediately above the confluence with Dyers Creek to the confluence with the Rio Grande.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
CORGRG06	6. Mainstem of West Willow Creek from immediately above Deerhorn Creek to the Park Regent Mine dump (37.890445, -106.936868). East Willow Creek from the confluence with Whited Creek to the confluence with West Willow Creek.
Listed portion:	CORGRG06_B	East Willow Creek from the confluence with Whited Creek to the confluence with West Willow Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
CORGRG07	7. Mainstem of West Willow Creek from the Park Regent Mine dump (37.890445, -106.936868) to the confluence with East Willow Creek. Mainstem of Willow Creek, including all tributaries, from the confluence of East and West Willow Creeks to the confluence with the Rio Grande.
Listed portion:	CORGRG07_A	Mainstem of West Willow Creek from the Park Regent Mine dump to the confluence with Nelson Creek. Mainstem of Willow Creek, including all tributaries from the confluence of East and West Willow Creeks, to the confluence with the Rio Grande.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Listed portion:	CORGRG07_B	West Willow Creek below Nelson Creek to East Willow Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
CORGRG09a	9a. Mainstem of the South Fork Rio Grande, including all tributaries and wetlands, from the source to a point just below the confluence with Decker Creek, excluding the specific listings in segment 1. Mainstem of Beaver Creek, including all tributaries and wetlands, from the source to the inlet of Beaver Creek Reservoir.
Listed portion:	CORGRG09a_A	North Branch of Pass Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
CORGRG10	10. Mainstem of Pinos Creek, including all tributaries and wetlands, from the source to the confluence with the Rio Grande.
Listed portion:	CORGRG10_A	Mainstem of Pinos Creek, including all tributaries and wetlands, from the source to the confluence with the Rio Grande.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
CORGRG11	11. Mainstem of San Francisco Creek (Rio Grande County), including all tributaries and wetlands, from the source to the confluence with the Rio Grande.
Listed portion:	CORGRG11_C	Mainstem of San Francisco Creek (Rio Grande County), including all tributaries and wetlands, from the source to a point immediately below the confluence with Spring Branch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
CORGRG12	12. Mainstem of the Rio Grande from the Rio Grande/Alamosa County line to Conejos County Road G (37.07831, -105.75665).
Listed portion:	CORGRG12_A	Mainstem of the Rio Grande from the Rio Grande/Alamosa County line to the Old State Bridge east of Lobatos (Conejos County Road G).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
CORGRG13	13. Mainstem of the Rio Grande from Conejos County Road G (37.07831, -105.75665) to the Colorado/New Mexico border.
Listed portion:	CORGRG13_A	Mainstem of the Rio Grande from Old State Bridge east of Lobatos (Conejos County Road G) to the Colorado/New Mexico border.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
CORGRG19	19. Mainstem of Rock Creek, including all tributaries and wetlands, from the source to the Monte Vista Canal (37.52773, -106.16826).
Listed portion:	CORGRG19_A	Mainstem of Rock Creek, including all tributaries and wetlands, from the source to the Monte Vista Canal.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
CORGRG20a	20a. Mainstem of Cat Creek, including all tributaries and wetlands, from the source to the Rio Grande National Forest boundary.
Listed portion:	CORGRG20a_B	Deer Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
CORGRG23a	23a. Mainstem of Sangre de Cristo Creek, including all tributaries and wetlands, from the source to Hwy 159, excluding the specific listings in segment 23b.
Listed portion:	CORGRG23a_C	Placer Creek and its Tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Listed portion:	CORGRG23a_E	Blind Canyon, Black Canyon, Malo Vega Creek, Gomer Gulch, Sawmill Gulch, West Indian Creek, and their tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
CORGRG23b	23b. Mainstem of Sangre de Cristo Creek from a point immediately below the confluence with Placer Creek to Hwy 159.
Listed portion:	CORGRG23b_A	Mainstem of Sangre de Cristo Creek from a point immediately below the confluence with Placer Creek to Hwy 159.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
CORGRG25	25. Mainstem of Trinchera Creek, including all tributaries and wetlands, from the source to the inlet of Mountain Home Reservoir.
Listed portion:	CORGRG25_A	Mainstem of Trinchera Creek including all tributaries and wetlands, from the source to the inlet of Mountain Home Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
CORGRG26	26. Mainstem of Trinchera Creek from the outlet of Mountain Home Reservoir to the Rio Grande.
Listed portion:	CORGRG26_A	Mainstem of Trinchera Creek from the outlet of Mountain Home Reservoir to the Rio Grande.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
CORGRG28	28. Mainstem of Rito Seco, including all tributaries and wetlands, from the source to the road crossing at 37.218809, -105.411762.
Listed portion:	CORGRG28_B	Mainstem of Rito Seco, including all tributaries and wetlands, from the Battle Mountain Gold Mine to Salazar Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
CORGRG33	33. All lakes and reservoirs tributary to the Rio Grande from the source to the Hwy 112 bridge near Del Norte, excluding the specific listings in segments 32 and 38. All lakes and reservoirs tributary to San Francisco Creek from the source to a point immediately below the confluence with Spring Branch.
Listed portion:	CORGRG33_B	Alberta Park Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
CORGRG37	37. Sanchez Reservoir.
Listed portion:	CORGRG37_A	Sanchez Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Fish (Mercury)	4a. - TMDL	N/A
CORGRG38	38. Continental Reservoir, Upper Brown Lake, Santa Maria Reservoir, Road Canyon Reservoir, Rio Grande Reservoir, Big Meadows Reservoir, Beaver Creek Reservoir, Smith Reservoir, Mountain Home Reservoir.
Listed portion:	CORGRG38_B	Smith Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	CORGRG38_C	Big Meadows Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	CORGRG38_D	Road Canyon Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGRG38_E	Mountain Home Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen (Temperature)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	CORGRG38_G	Continental Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COSJAF02	2. Mainstem of the Animas River, including all tributaries and wetlands, from the outlet of Denver Lake to a point immediately above the confluence with Minnie Gulch, except for specific listings in Segment 6.
Listed portion:	COSJAF02_B	Mainstem of the Animas River, including all tributaries and wetlands, from the outlet of Denver Lake to a point immediately above the confluence with Minnie Gulch, except for specific listings in Segment 6.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
COSJAF03a	3a. Mainstem of the Animas River, including wetlands, from a point immediately below the confluence with Minnie Gulch to immediately above the confluence with Cement Creek.
Listed portion:	COSJAF03a_A	Mainstem of the Animas River, including wetlands, from a point immediately below the confluence with Minnie Gulch to immediately above the confluence with Cement Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COSJAF03a_B	Mainstem of the Animas River, including wetlands, From Minnie Gulch to Maggie Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
COSJAF03b	3b. Mainstem of the Animas River, including wetlands, from a point immediately above the confluence with Cement Creek to a point immediately above the confluence with Mineral Creek.
Listed portion:	COSJAF03b_A	Mainstem of the Animas River, including wetlands, from a point immediately above the confluence with Cement Creek to a point immediately above the confluence with Mineral Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
COSJAF03c	3c. Arrastra Gulch including all tributaries and wetlands from the source to the confluence with the Animas River.
Listed portion:	COSJAF03c_A	Arrastra Gulch including all tributaries and wetlands from the source to the confluence with the Animas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
COSJAF04a	4a. Mainstem of the Animas River, including wetlands, from a point immediately above the confluence with Mineral Creek to a point immediately above the confluence with Deer Park Creek.
Listed portion:	COSJAF04a_A	Mainstem of the Animas River, including wetlands, from a point immediately above the confluence with Mineral Creek to a point immediately above the confluence with Deer Park Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Aluminum (Total)	5. - 303(d) List	M
Aquatic Life Use	Manganese (Dissolved)	5. - 303(d) List	M
COSJAF04b	4b. Mainstem of the Animas River, including wetlands, from a point immediately above the confluence with Deer Park Creek to Bakers Bridge (37.458620, -107.799194).
Listed portion:	COSJAF04b_A	Mainstem of the Animas River, including wetlands, from a point immediately above the confluence with Deer Park Creek to Bakers Bridge.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSJAF05a	5a. Mainstem of the Animas River, including wetlands, from Bakers Bridge (37.458620, -107.799194) to the Southern Ute Indian Reservation boundary.
Listed portion:	COSJAF05a_B	Mainstem of the Animas River, including wetlands, from Bakers Bridge to Junction Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSJAF05a_C	Mainstem of the Animas River, including wetlands, from Junction Creek to the Southern Ute Indian Reservation boundary.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSJAF06	6. Mainstem of the Animas River from the source to the outlet of Denver Lake. Mainstem, including all tributaries and wetlands of Cinnamon Creek, Grouse Gulch, Picayne Gulch, and Minnie Gulch. All tributaries and wetlands to the Animas River from immediately above Maggie Gulch to to a point immediately above Elk Creek except for those listed under segments 3c, 7, 8 and 9. South Mineral Creek and all other tributaries and wetlands to Mineral Creek, except for those specifically listed in segments 8 and 9.
Listed portion:	COSJAF06_D	Mill Creek, Porphyry Gulch, and Big Horn Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
COSJAF07	7. Mainstem of Cement Creek, including all tributaries, and wetlands, from the source to the confluence with the Animas River.
Listed portion:	COSJAF07_A	Mainstem of Cement Creek, including all tributaries, and wetlands, from the source to the confluence with the Animas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
COSJAF08	8. Mainstem of Mineral Creek, including wetlands, from the source to a point immediately above the confluence with South Mineral Creek. All tributaries on the east side of this segment of Mineral Creek including wetlands, except for Big Horn Creek. Mainstem of the Middle Fork of Mineral Creek including all tributaries and wetlands from the source to the confluence with Mineral Creek except for Crystal Lake and its exiting tributary to confluence with Middle Fork of Mineral Creek.
Listed portion:	COSJAF08_A	Mainstem of Mineral Creek, including wetlands, from the source to a point immediately above the confluence with South Mineral Creek. All tributaries on the east side of this segment of Mineral Creek including wetlands, except for Big Horn Creek. Mainstem of the Middle Fork of Mineral Creek including all tributaries and wetlands from the source to the confluence with Mineral Creek except for Crystal Lake and its exiting tributary to confluence with Middle Fork of Mineral Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Listed portion:	COSJAF08_B	Middle Fork of Mineral Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Aluminum (Total)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
COSJAF09	9. Mainstem of Mineral Creek, including wetlands, from immediately above the confluence with South Mineral Creek to the confluence with the Animas River.
Listed portion:	COSJAF09_A	Mainstem of Mineral Creek, including wetlands, from immediately above the confluence with South Mineral Creek to the confluence with the Animas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Iron (Total)	4a. - TMDL	N/A
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Aluminum (Total)	5. - 303(d) List	M
COSJAF10a	10a. Mainstem of the Florida River from the boundary of the Weminuche Wilderness Area to the inlet of Lemon Reservoir.
Listed portion:	COSJAF10a_A	Mainstem of the Florida River from the boundary of the Weminuche Wilderness Area to the inlet of Lemon Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSJAF13a	13a. Mainstem of Junction Creek including all tributaries, from the U.S. Forest Boundary to the confluence with Animas River.
Listed portion:	COSJAF13a_B	Junction Creek from US Forest Boundary to confluence with the Animas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COSJAF14b	14b. Mainstem of Lightner Creek from below the confluence with Deep Creek to the confluence with the Animas River.
Listed portion:	COSJAF14b_B	Mainstem of Lightner Creek, including wetlands, from below the confluence with Deep Creek to the confluence with the Animas River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COSJAF22	22. Electra Lake. Lake Nighthorse.
Listed portion:	COSJAF22_A	Lake Nighthorse.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSJAF22_B	Electra Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSJDO03	3. Mainstem of the Dolores River from a point immediately above the confluence with Horse Creek to a point immediately above the confluence with Bear Creek.
Listed portion:	COSJDO03_A	Mainstem of the Dolores River from a point immediately above the confluence with Horse Creek to a point immediately above the confluence with Bear Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSJDO04a	4a. Mainstem of the Dolores River from a point immediately above the confluence with Bear Creek to the bridge at Bradfield Ranch (Forest Route 505, near Montezuma/Dolores County Line).
Listed portion:	COSJDO04a_B	Mainstem of the Dolores River from a point immediately above the confluence with Bear Creek to McPhee Reservior.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COSJDO04b	4b. McPhee Reservoir and Summit Reservoir.
Listed portion:	COSJDO04b_A	Summit Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Listed portion:	COSJDO04b_B	McPhee Reservoir
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	4a. - TMDL	N/A
COSJDO05a	5a. All tributaries to the Dolores River and West Dolores River, including all wetlands, from the source to a point immediately below the confluence with the West Dolores River except for specific listings in Segments 1 and 5b through 10.
Listed portion:	COSJDO05a_B	Fish Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSJDO05a_C	Roaring Forks Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
COSJDO09	9. Mainstem of Silver Creek from a point immediately below the Town of Rico's water supply diversion to the confluence with the Dolores River.
Listed portion:	COSJDO09_B	Mainstem of Silver Creek, including wetlands, from a point immediately below the Town of Rico's water supply diversion to the confluence with the Dolores River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COSJDO10b	10b. Mainstem of the West Dolores River from above the confluence with Fish Creek to the confluence with the Dolores River.
Listed portion:	COSJDO10b_B	Mainstem of the West Dolores River, including wetlands, from above the confluence with Fish Creek to the confluence with the Dolores River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSJDO11b	11b. All tributaries to the Dolores River, including all wetlands, from a point immediately below the confluence of the West Dolores River to the inlet of McPhee Reservoir, except for the specific listing in Segments 4a and 11a.
Listed portion:	COSJDO11b_A	All tributaries to the Dolores River, including all wetlands, from below West Dolores River to the inlet of McPhee Reservoir, except for 4a, 11a.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COSJLP01	1. Mainstem of the La Plata River, including all wetlands and tributaries from the source to the Hay Gulch diversion south of Hesperus.
Listed portion:	COSJLP01_A	Mainstem of the La Plata River, including all wetlands and tributaries from the source to the Hay Gulch diversion south of Hesperus.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	H
COSJLP02a	2a. Mainstem of the La Plata River from the Hay Gulch diversion south of Hesperus to the boundary of Southern Ute Indian Reservation.
Listed portion:	COSJLP02a_A	Mainstem of the La Plata River from the Hay Gulch diversion south of Hesperus to the boundary of Southern Ute Indian Reservation.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSJLP04a	4a. Mainstem of the Mancos River, including all wetlands and tributaries, from the source of the East, West and Middle Forks to the San Juan National Forest Boundary.
Listed portion:	COSJLP04a_A	All Tributaries and wetlands to the mainstem of the Mancos River, from the source of West and Middle Forks to the San Juan, except for the East Mancos River and Box Canyon Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSJLP04a_D	Box Canyon Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	4a. - TMDL	N/A
Listed portion:	COSJLP04a_E	Mainstem of E. Mancos River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Nickel (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Agricultural Use	Copper (Total)	5. - 303(d) List	M
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSJLP04a_F	Tributaries of E. Mancos River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Mercury (Total)	3b. - M&E List	N/A
Agricultural Use	Copper (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
COSJLP04c	4c. Mainstem of the Mancos River, including all wetlands, tributaries, from below the San Juan National Forest Boundary to Hwy 160. Chicken Creek, including all tributaries, from its source to the confluence with the Mancos River.
Listed portion:	COSJLP04c_C	Mainstem of the Mancos River the confluence of the East and West Forks to Hwy 160.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Listed portion:	COSJLP04c_D	East Mancos River from the National Forest boundary to the confluence with Middle Mancos River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COSJLP04c_H	Chicken Creek, including all tributaries and wetlands, from its source to the confluence with the Mancos River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSJLP05	5. Mainstem of the Mancos River from Hwy 160 to the boundary of the Ute Mountain Indian Reservation and mainstem of Weber Canyon from source to boundary of the Ute Mountain Ute Indian Reservation.
Listed portion:	COSJLP05_B	Mainstem of the Mancos River from Hwy 160 to the boundary of the Ute Mountain Indian Reservation.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
COSJLP06a	6a. All tributaries to the Mancos River, including all wetlands, from Hwy 160 to the boundary of the Ute Mountain Indian Reservation, except for specific listings in segment 4c, 5, 6b and 6c. Navajo Wash, including all tributaries, from the source to the Ute Mountain Indian Reservation Boundary.
Listed portion:	COSJLP06a_D	All tributaries to the Mancos River, including all wetlands, from Hwy 160 to the boundary of the Ute Mountain Indian Reservation, except for portion 6a_C (Navajo Wash) and specific listings in segment 4c, 5a, 6b and 6c.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COSJLP06a_E	Navajo Wash, including tributaries and wetlands, from the source to the Ute Mountain Indian Reservation Boundary.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Agricultural Use	Selenium (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
COSJLP07a	7a. Mainstem of McElmo Creek from the source to the confluence with Alkali Canyon. Mainstem of Yellow Jacket Creek, including all tributaries and wetlands, from the source to the confluence with McElmo Creek.
Listed portion:	COSJLP07a_C	Mainstem of McElmo Creek, from the source to Alkali Canyon.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COSJLP07b	7b. Mainstem of McElmo Creek from the confluence with Alkali Canyon to the Colorado/Utah border, except portion within the Ute Mountain Indian Reservation.
Listed portion:	COSJLP07b_B	Mainstem of McElmo Creek from Alkali Canyon to the Utah border except for portions within the Ute Mountain Ute boundry.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COSJLP08	8. All tributaries to McElmo Creek, including all wetlands, from the source to the Colorado/Utah border, except for the portions within the Ute Mountain Indian Reservation and except for specific listings in Segments 7a, 7b and 11.
Listed portion:	COSJLP08_A	All tributaries and wetlands to McElmo Creek, except Mud Creek, Hartman Draw, and Ritter Draw.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Listed portion:	COSJLP08_B	Mud Creek and all tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Listed portion:	COSJLP08_C	Hartman Draw and all tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Listed portion:	COSJLP08_D	Trail Canyon and its tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COSJLP08_E	Ritter Draw and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
COSJLP09	9. Unnamed tributary to Ritter Draw (confluence at 37.4059, -108.5325).
Listed portion:	COSJLP09_C	Unnamed tributary to Ritter Draw (confluence at 37.4059,-108.5325), and wetlands.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COSJLP11	11. Narraguinnep, Puett and Totten Reservoirs.
Listed portion:	COSJLP11_A	Puett Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Listed portion:	COSJLP11_B	Narraguinnep Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Fish (Mercury)	4a. - TMDL	N/A
Listed portion:	COSJLP11_C	Totten Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
COSJPI05a	5a. All tributaries to the Piedra River, including all wetlands, from the boundary of the Weminuche Wilderness Area to a point immediately below the confluence with the First Fork of the Piedra River. Devil Creek, including all tributaries, from the source to a point below the confluence with Dunagan Canyon.
Listed portion:	COSJPI05a_B	Williams Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COSJPI05a_C	All tributaries to the Piedra River, including all wetlands, from the boundary of the Weminuche Wilderness Area to the confluence with First Fork, Devil Creek including its tributaries and wetlands to Dunagan Creek, except for segments 2a, 3 and Williams Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COSJPI06a	6a. All tributaries to the Piedra River, including all wetlands, from a point immediately below the confluence with Devil Creek to Southern Ute Indian Reservation boundary, except the specific listing in Segment 6d.
Listed portion:	COSJPI06a_E	Mainstem of Stollsteimer Creek from Martinez Creek to the confluence with Hall Canyon.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	M
Listed portion:	COSJPI06a_F	Tributaries to Stollsteimer Creek to the confluence with Hall Canyon not on the the Southern Ute Reservation.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
COSJPI08	8. Williams Creek Reservoir.
Listed portion:	COSJPI08_A	Williams Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
COSJPN02a	2a. Mainstem of the Los Pinos River from the boundary of the Weminuche Wilderness Area to the boundary of the Southern Ute Indian Reservation except for the specific listing in Segment 3.
Listed portion:	COSJPN02a_A	Mainstem of the Los Pinos River from the boundary of the Weminuche Wilderness Area to the boundary of the Southern Ute Indian Reservation except for the specific listing in Segment 3.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSJPN03	3. Vallecito Reservoir.
Listed portion:	COSJPN03_A	Vallecito Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen (Temperature)	5. - 303(d) List	H
COSJPN04	4. All tributaries to the Los Pinos River and Vallecito Reservoir, including all wetlands, from the boundary of the Weminuche Wilderness Area to a point immediately below the confluence with Bear Creek, except for the specific listing in Segment 5; mainstems of Beaver Creek, Ute Creek, and Spring Creek from their sources to the boundary of the Southern Ute Indian Reservation.
Listed portion:	COSJPN04_B	All tributaries to the Los Pinos River and Vallecito Reservoir, including all wetlands, from the boundary of the Weminuche Wilderness Area to a point immediately below the confluence with Bear Creek (T35N, R7W), except for the specific listing in Segment 5; mainstems of Beaver Creek, Ute Creek, and Spring Creek, including wetlands, from their sources to the boundary of the Southern Ute Indian Reservation.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
COSJPN05	5. Mainstem of Vallecito Creek from the boundary of the Weminuche Wilderness Area to Vallecito Reservoir.
Listed portion:	COSJPN05_B	Mainstem of Vallecito Creek, including wetlands, from the boundary of the Weminuche Wilderness Area to Vallecito Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSJSJ01b	1b. Mainstem of the Navajo River, including all wetlands and tributaries from below the confluence with Sheep Creek to the Colorado/New Mexico border, except for specific listings in Segment 3.
Listed portion:	COSJSJ01b_B	Mainstem of the Navajo River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COSJSJ03	3. Mainstem of the Little Navajo River from the San Juan-Chama diversion to the confluence with the Navajo River; all tributaries to the Navajo River and the Little Navajo River, including all wetlands, from the San Juan-Chama diversions to the confluence with the San Juan River.
Listed portion:	COSJSJ03_A	Mainstem of the Little Navajo River from the San Juan-Chama diversion to the confluence with the Navajo River; all tributaries to the Navajo River and the Little Navajo River, including all wetlands, from the San Juan-Chama diversions to the confluence with the San Juan River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
COSJSJ06b	6b. Mainstem of the San Juan River from Highway 160 in Pagosa Springs to the Southern Ute Indian Reservation Northern boundary. Mainstem of Mill Creek from the source to the confluence with the San Juan River.
Listed portion:	COSJSJ06b_C	Mainstem of the San Juan River from Hwy 160 to the Southern Ute Reservation Boundary.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COSJSJ06b_D	Mainstem of Mill Creek, including wetlands, from the source to confluence with the San Juan River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COSJSJ08	8. Navajo Reservoir. Echo Canyon Reservoir.
Listed portion:	COSJSJ08_B	Echo Canyon Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Listed portion:	COSJSJ08_C	Navajo Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
COSJSJ09a	9a. Mainstem of the Rio Blanco, including all tributaries and wetlands, from a point immediately below the confluence with Leche Creek to the Southern Ute Indian Reservation boundary, except for specific listings in Segment 10.
Listed portion:	COSJSJ09a_A	Mainstem of the Rio Blanco, including all tributaries and wetlands, from a point immediately below the confluence with Leche Creek to the Southern Ute Indian Reservation boundary, except for specific listings in Segment 10.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COSJSJ10	10. Mainstem of the Rito Blanco River from Echo Ditch to the confluence with the Rio Blanco River.
Listed portion:	COSJSJ10_B	Mainstem of the Rito Blanco River, including wetlands, from Echo Ditch to the confluence with the Rio Blanco River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COSPBD01	1. Mainstem of Big Dry Creek, including all tributaries and wetlands, from the outlet of Standley Lake to the confluence with the South Platte River. Walnut Creek, including tributaries and wetlands, from the outlet of Great Western Reservoir to the confluence with Big Dry Creek.
Listed portion:	COSPBD01_A	Mainstem of Big Dry Creek, including all tributaries and wetlands, from the oulet of Standley Lake to Weld County road 8. Walnut Creek, including tributaries and wetlands, from the outlet of Great Western Reservoir to the confluence with Big Dry Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	4a. - TMDL	N/A
Listed portion:	COSPBD01_B	Mainstem of Big Dry Creek from Weld County Road 8 to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	4a. - TMDL	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
COSPBD02	2. Standley Lake.
Listed portion:	COSPBD02_A	Standley Lake.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSPBD04a	4a. Mainstem and all tributaries to Woman and Walnut Creeks from sources to Standley Lake and Great Western Reservoir, respectively, except for listings in Segments 4b and 5a.
Listed portion:	COSPBD04a_A	Mainstem and all tributaries to Woman and Walnut Creeks from sources to Standley Lake and Great Western Reservoir, respectively, except for specific listings in Segments 4b and 5.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
COSPBD05a	5a. North Walnut Creek from the western edge of the Central Operable Unit and South Walnut Creek from its source, including all tributaries and wetlands, to the eastern boundary of the Central Operable Unit.
Listed portion:	COSPBD05a_A	North Walnut Creek from the western edge of the Central Operable Unit and South Walnut Creek from its source, including all tributaries, and wetlands, to the eastern boundary of the Central Operable Unit.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	NO2+NO3	5. - 303(d) List	L
COSPBE01a	1a. Mainstem of Bear Creek from the boundary of the Mt. Evans Wilderness area to the inlet of Evergreen Lake.
Listed portion:	COSPBE01a_B	Bear Creek below Yankee Creek to the inlet of Evergreen Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COSPBE01b	1b. Mainstem of Bear Creek from Harriman Ditch to the inlet of Bear Creek Reservoir.
Listed portion:	COSPBE01b_A	Mainstem of Bear Creek from Harriman Ditch to the inlet of Bear Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	M
COSPBE01c	1c. Bear Creek Reservoir.
Listed portion:	COSPBE01c_A	Bear Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Chlorophyll-A	5. - 303(d) List	H
Aquatic Life Use	Total Phosphorus	5. - 303(d) List	H
COSPBE01e	1e. Mainstem of Bear Creek from the outlet of Evergreen Lake to the Harriman Ditch.
Listed portion:	COSPBE01e_A	Mainstem of Bear Creek from Kerr/Swede Gulch to Mount Vernon Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COSPBE01e_B	Bear creek from Mount Vernon Creek to the Harriman Ditch.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
COSPBE02	2. Mainstem of Bear Creek from the outlet of Bear Creek Reservoir to the confluence with the South Platte River.
Listed portion:	COSPBE02_A	Bear Creek from the outlet of Evergreen Lake to Kipling Parkway.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBE02_B	Bear Creek from Kipling Parkway to Wadsworth Boulevard.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBE02_C	Bear Creek from Wadsworth Boulevard to South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
COSPBE03	3. All tributaries to Bear Creek, including all wetlands, from the source to the outlet of Evergreen Lake, except for listings in Segment 7.
Listed portion:	COSPBE03_B	Vance Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COSPBE04	4. All tributaries to Bear Creek, including all wetlands, from the outlet of Evergreen Lake to the confluence with the South Platte River, except for specific listings in Segments 5, 6a, and 6b.
Listed portion:	COSPBE04_B	Mt. Vernon Creek and all of its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
COSPBE06a	6a. Turkey Creek system, including all tributaries and wetlands, from the source to the inlet of Bear Creek Reservoir, except for listings in Segment 6b.
Listed portion:	COSPBE06a_A	Turkey Creek system, including all tributaries and wetlands, from Parmalee Gulch to the inlet of Bear Creek Reservoir, except for listings in Segment 6b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	COSPBE06a_B	Turkey Creek system, including all tributaries and wetlands, from the source to Parmalee Gulch, except for listings in Segment 6b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
COSPBE06b	6b. Mainstem of North Turkey Creek, from the source to the confluence with Turkey Creek.
Listed portion:	COSPBE06b_A	Mainstem of North Turkey Creek, from the source to the confluence with Turkey Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
COSPBE11	11. Lakes and reservoirs in the Bear Creek system from the outlet of Evergreen Lake to the confluence with the South Platte River, except for lakes and reservoirs in Segments 1c, 10, and 12; includes Soda Lakes.
Listed portion:	COSPBE11_B	Harriman Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSPBO02a	2a. Mainstem of Boulder Creek, including all tributaries and wetlands, from the boundary of the Indian Peaks Wilderness Area to a point immediately below the confluence with North Boulder Creek, except for the specific listings in Segment 3.
Listed portion:	COSPBO02a_A	Mainstem of Middle Boulder Creek below 39.971 -105.4755, including all tributaries and wetlands, from the boundary of the Indian Peaks Wilderness Area to a point immediately below the confluence with North Boulder Creek, except for the specific listings in Segment 3.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO02a_B	North Boulder Creek from Caribou Creek to the confluence with Como Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO02a_C	North Boulder Creek to the confluence with Caribou Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPBO02a_D	Middle Boulder Creek from the outlet at Baker Reservoir to Longitude:-105.475577° Latitude: 39.971275°.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO02a_E	Mainstem of North Boulder Creek from Como Creek to the confluence of Middle Boulder Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO02a_F	Como Creek and its tributaries from source to North Boulder Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
COSPBO02b	2b. Mainstem of Boulder Creek, including all tributaries and wetlands, from a point immediately below the confluence with North Boulder Creek to a point immediately above the confluence with South Boulder Creek.
Listed portion:	COSPBO02b_B	Mainstem of Boulder Creek from 13th St. to immediately above the confluence with South Boulder Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPBO02b_D	Mainstem of Boulder Creek, including all tributaries and wetlands, from the City of Boulder boundary (40.013181, -105.301472) to a point immediately above 13th St (40.0143, -105.2779), except for Bear 0Canyon and Gregory Creeks.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List
Recreational Use	E. coli	5. - 303(d) List
Listed portion:	COSPBO02b_E	Mainstem of Fourmile Creek, including all tributaries and wetlands, from the source to the confluence of Boulder Creek, except Gold Run Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO02b_F	Gold Run Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Listed portion:	COSPBO02b_G	Mainstem of Boulder Creek, including all tributaries and wetlands, from a point immediately below the confluence with North Boulder Creek to a point immediately above the City of Boulder boundary (40.013181, -105.301472), including the entirety of Bear Canyon and Gregory creeks, and except for specific listings in Four Mile and Gold Run Creeks.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	H
COSPBO03	3. Mainstem of Middle Boulder Creek, including all tributaries and wetlands, from the source to the outlet of Barker Reservoir, except for specific listings in Segment 1.
Listed portion:	COSPBO03_A	Tributaries and wetlands to Middle Boulder Creek, from the source to the outlet of Barker Reservoir, except for specific listings in Segment 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPBO03_B	Mainstem of the Middle Boulder Creek, from the source to the outlet of Barker Reservoir, except for specific listings in Segment 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPBO04a	4a. Mainstem of South Boulder Creek, including all tributaries and wetlands, from the source to the outlet of Gross Reservoir except for specific listings in Segment 1.
Listed portion:	COSPBO04a_A	Mainstem of South Boulder Creek, including all tributaries and wetlands, from the source to the outlet of Gross Reservoir except for specific listings in Segment 1 and Gamble Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPBO04a_B	Gamble Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COSPBO04b	4b. Mainstem of South Boulder Creek, including all tributaries and wetlands, from the outlet of Gross Reservoir to South Boulder Road, except for specific listings in Segments 4c and 4d.
Listed portion:	COSPBO04b_C	Mainstem of South Boulder Creek, including all tributaries and wetlands, from the outlet of Gross Reservoir to the mouth of Eldorado Canyon above the Community Ditch diversion structure (39°55'56.82"N, 105°16'50.56"W), except for specific listings in Segments 4c and 4d.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO04b_D	Mainstem of South Boulder Creek, including all tributaries and wetlands, from below the Community Ditch diversion structure (39°55'56.82"N, 105°16'50.56"W), to South Boulder Road, except for specific listings in Segments 4c and 4d.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
COSPBO07a	7a. Mainstem of Coal Creek from Highway 93 to Highway 36 (Boulder Turnpike).
Listed portion:	COSPBO07a_A	Mainstem of Coal Creek from Highway 93 to Highway 36 (Boulder Turnpike).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
COSPBO07b	7b. Mainstem of Coal Creek from Highway 36 to the confluence with Boulder Creek.
Listed portion:	COSPBO07b_A	Mainstem of Coal Creek from Highway 36 to the confluence with Rock Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPBO07b_B	Mainstem of Coal Creek from Rock Creek to Boulder Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSPBO08	8. All tributaries to South Boulder Creek, including all wetlands from South Boulder Road to the confluence with Boulder Creek and all tributaries to Coal Creek, including all wetlands from Highway 93 to the confluence with Boulder Creek.
Listed portion:	COSPBO08_B	Rock Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	M
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COSPBO09	9. Mainstem of Boulder Creek from a point immediately above the confluence with South Boulder Creek to the confluence with Coal Creek.
Listed portion:	COSPBO09_A	Mainstem of Boulder Creek from a point immediately above the confluence with South Boulder Creek to 107th Street.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	4a. - TMDL	N/A
Recreational Use	E. Coli (July - October)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBO09_B	Mainstem of Boulder Creek from 107th Street to Coal Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	4a. - TMDL	N/A
Recreational Use	E. Coli (July - October)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPBO10	10. Mainstem of Boulder Creek from the confluence with Coal Creek to the confluence with St. Vrain Creek.
Listed portion:	COSPBO10_A	Mainstem of Boulder Creek from the confluence with Coal Creek to the confluence with St. Vrain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	4a. - TMDL	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPBO14	14. All lakes and reservoirs tributary to Boulder Creek from the source to a point immediately above the South Boulder Creek confluence, except as specified in Segment 13. This segment includes Barker and Lakewood Reservoir.
Listed portion:	COSPBO14_B	Barker Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPBO14_D	Silver Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
COSPBO18	18. Gross Reservior.
Listed portion:	COSPBO18_A	Gross Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	3b. - M&E List	N/A
COSPBT01	1. Mainstem of the Big Thompson River, including all tributaries and wetlands, within Rocky Mountain National Park.
Listed portion:	COSPBT01_B	Mainstem of the Big Thompson River, including all tributaries and wetlands, within Rocky Mountain National Park.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	H
COSPBT02	2. Mainstem of the Big Thompson River from the boundary of Rocky Mountain National Park to the Greeley-Loveland Canal Diversion (40.397884, -105.106482). All tributaries to the Big Thompson River, including all wetlands, from the boundary of Rocky Mountain National Park to the Home Supply Canal diversion (40.424430, -105.210449).
Listed portion:	COSPBT02_A	Mainstem of the Big Thompson River, including all tributaries and wetlands, from the Upper Thompson Sanitaton District discharge to a point immediately below Cedar Creek, except for the North Fork Big Thompson River and Fish Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List
Aquatic Life Use	Mercury (Total)	5. - 303(d) List
Listed portion:	COSPBT02_B	Fish Creek below Mary's Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List
Water Supply Use	Arsenic (Total)	5. - 303(d) List
Aquatic Life Use	pH	5. - 303(d) List
Water Supply Use	Nitrate	5. - 303(d) List
Listed portion:	COSPBT02_C	Mainstem of the Big Thompson River, including all tributaries and wetlands, from the boundary of Rocky Mountain National Park to the Upper Thompson Sanitation District discharge.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Water Supply Use	Nitrate	5. - 303(d) List	H
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	H
Listed portion:	COSPBT02_D	Mainstem of the Big Thompson River, including all tributaries and wetlands, from immediately below Cedar Creek to the Home Supply Canal diversion (40.424430, -105.210449).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPBT02_E	Mainstem of the North Fork Big Thompson River from the boundary of Rocky Mountain National Park to the confluence with the Big Thompson River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List
Water Supply Use	Arsenic (Total)	5. - 303(d) List
Aquatic Life Use	Mercury (Total)	5. - 303(d) List
Listed portion:	COSPBT02_F	Mainstem of the Big Thompson River from the Home Supply Canal diversion (40.424430, -105.210449) to the Big Barnes Ditch (40.406, -105.143).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Listed portion:	COSPBT02_G	Mainstem of the Big Thompson River from the Big Barnes Ditch (40.406, -105.143) to the Greeley-Loveland Canal Diversion (40.397884, -105.106482).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
COSPBT03	3. Mainstem of the Big Thompson River from the Greeley-Loveland Canal diversion (40.397884, -105.106482) to County Road 11H.
Listed portion:	COSPBT03_B	Mainstem of the Big Thompson from the Greeley-Loveland Canal diversion (40.397884, -105.106482) to County Road 11H.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPBT04	4. Mainstem of the Big Thompson River from County Road 11H to I-25.
Listed portion:	COSPBT04_A	Mainstem of the Big Thompson River from County Road 11H to I-25.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	M
COSPBT05	5. Mainstem of The Big Thompson River from I-25 to the confluence with the South Platte River.
Listed portion:	COSPBT05_A	Mainstem of The Big Thompson River from I-25 to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	M
COSPBT06	6. All tributaries to the Big Thompson River, including all wetlands, from the Home Supply Canal diversion (40.424430, -105.210449) to the confluence with the South Platte River, except for listings in segments 7, 8, 9, and 10.
Listed portion:	COSPBT06_A	All tributaries to the Big Thompson River, including all wetlands, from the Home Supply Canal diversion (40.24430, -105.210449) to the confluence with the South Platte River, except for Dry Creek and listings in Segments 7, 8, 9, and 10.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COSPBT07	7. Buckhorn Creek from the source to the confluence with the Big Thompson River.
Listed portion:	COSPBT07_A	Buckhorn Creek from the source to the confluence with the Big Thompson River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Mercury (Total)	5. - 303(d) List	H
COSPBT08	8. Mainstem of the Little Thompson River, including all tributaries and wetlands, from the source to the Culver Ditch diversion (40.259242, -105.200029).
Listed portion:	COSPBT08_A	Mainstem of the Little Thompson River, including all tributaries and wetlands, from the the St. Vrain Supply Canal to the Culver Ditch diversion (40.253242, -105.200029).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPBT08_B	Mainstem of the Little Thompson River, including all tributaries and wetlands, from the source to the St. Vrain Supply Canal.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPBT09	9. Mainstem of the Little Thompson River from the Culver Ditch diversion (40.259242, -105.200029) to the confluence with the Big Thompson River.
Listed portion:	COSPBT09_A	Mainstem of the Little Thompson River from the Culver Ditch diversion (40.259242, -105.200029) to the confluence with the Big Thompson River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSPBT10	10. All tributaries to the Little Thompson River, including all wetlands, from the Culver Ditch diversion (40.259242, -105.200029) to the confluence with the Big Thompson River.
Listed portion:	COSPBT10_A	All tributaries to the Little Thompson River, including all wetlands, from the Culver Ditch diversion (40.259242, -105.200029) to the confluence with the Big Thompson River, except Big Hollow Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
COSPBT11	11. Carter Lake.
Listed portion:	COSPBT11_A	Carter Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COSPBT16	16. All lakes and reservoirs tributary to the Big Thompson River from the boundary of Rocky Mountain National Park to the Home Supply Canal diversion (40.424430, -105.210449). This segment includes Lake Estes and St Mary?s Lake.
Listed portion:	COSPBT16_B	Lake Estes.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
COSPCH01	1. Mainstem of Cherry Creek from the source of East and West Cherry Creek to the inlet of Cherry Creek Reservoir.
Listed portion:	COSPCH01_A	Mainstem of Cherry Creek from the source of East and West Cherry Creek to the inlet of Cherry Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSPCH02	2. Cherry Creek Reservoir.
Listed portion:	COSPCH02_A	Cherry Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Chlorophyll-A	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COSPCH03	3. Mainstem of Cherry Creek from the outlet of Cherry Creek Reservoir to the confluence with the South Platte River.
Listed portion:	COSPCH03_A	Mainstem of Cherry Creek from the outlet of Cherry Creek Reservoir to Holly Street.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPCH03_B	Mainstem of Cherry Creek from Holly street to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
COSPCH04a	4a. All tributaries to Cherry Creek, including all wetlands, from the source of East and West Cherry Creeks to the confluence with the South Platte River except for listings in Segment 4b.
Listed portion:	COSPCH04a_A	All tributaries to Cherry Creek, including all wetlands, from the source of East and West Cherry Creeks to the confluence with the South Platte River, except Goldsmith Gulch, McMurdo Gulch, and listings in Segment 4b.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Listed portion:	COSPCH04a_B	Goldsmith Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSPCH04b	4b. Cottonwood Creek, including all tributaries and wetlands, from the source to Cherry Creek Reservoir.
Listed portion:	COSPCH04b_B	Upper Windmill Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COSPCL02a	2a. Mainstem of Clear Creek, including all tributaries and wetlands, from the I-70 bridge above Silver Plume to a point just above the confluence with West Fork Clear Creek, except for listings in Segments 3a and 3b.
Listed portion:	COSPCL02a_B	Mainstem of Clear Creek, including all tributaries and wetlands, from the I-70 bridge above Silver Plume to the inlet of Georgetown Lake, except for listings in Segments 3a and 3b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPCL02a_C	Mainstem of Clear Creek, including all tributaries and wetlands, from the outlet of Georgetown Lake to a point just above the confluence with West Fork Clear Creek, except for listings in Segments 3a and 3b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COSPCL02b	2b. Mainstem of Clear Creek, including all tributaries and wetlands, from the confluence with West Fork Clear Creek to a point just below the confluence with Mill Creek, except for listings in Segments 4 through 8.
Listed portion:	COSPCL02b_B	Mainstem of Clear Creek from the confluence with West Fork Clear Creek to a point just below the confluence with Mill Creek, except for listings in Segments 4 through 8.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPCL02b_C	All tributaries and wetlands to Clear Creek, from the confluence with West Fork Clear Creek to a point just below the confluence with Mill Creek, except for listings in Segments 4 through 8.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COSPCL02c	2c. Mainstem of Clear Creek, including all tributaries and wetlands, from a point just below the confluence with Mill Creek to a point just above the Argo Tunnel discharge, except for listings in Segments 9a, 9b, and 10.
Listed portion:	COSPCL02c_B	Turkey Gulch below Rockford Tunnel.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Nickel (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPCL02c_C	Mainstem of Clear Creek from the confluence with Mill Creek to a point just above the Argo Tunnel discharge.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPCL02c_E	Virginia Canyon from its source to its confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
Water Supply Use	Nickel (Total)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Manganese (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Nickel (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPCL02c_F	All tributaries and wetlands of Clear Creek, from a point just below the confluence with Mill Creek to a point just above the Argo Tunnel discharge, except for Virginia Canyon, Turkey Gulch below Rockford Tunnel, and listings in Segments 9a, 9b, and 10.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
COSPCL03a	3a. Mainstem of South Clear Creek, including all tributaries and wetlands, from the source to the confluence with Clear Creek, except for the listings in Segments 3b and 19.
Listed portion:	COSPCL03a_A	Mainstem of South Clear Creek, including all tributaries and wetlands, from the source to Lower Cabin Creek Reservoir, except for the listings in Segments 3b and 19.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Listed portion:	COSPCL03a_B	Mainstem of South Clear Creek, including all tributaries and wetlands, from a point just above Clear Lake to the confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPCL03a_C	Mainstem of South Clear Creek from Lower Cabin Creek Reservoir to Clear Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Macroinvertebrates	4b. - 4b plan	N/A
COSPCL03b	3b. Mainstem of Leavenworth Creek from source to confluence with South Clear Creek.
Listed portion:	COSPCL03b_A	Mainstem of Leavenworth Creek from source to confluence with South Clear Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
COSPCL05	5. Mainstem of West Fork Clear Creek from the confluence with Woods Creek to the confluence with Clear Creek.
Listed portion:	COSPCL05_B	West Fork of Clear Creek from Hoop Creek to the confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COSPCL06	6. All tributaries to West Fork Clear Creek, including all wetlands, from the source to the confluence with Clear Creek, except for listings in Segments 7a and 8.
Listed portion:	COSPCL06_C	North Empire Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Manganese (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Nickel (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
COSPCL09a	9a. Mainstem of Fall River, including all tributaries and wetlands, from the source to the confluence with Clear Creek.
Listed portion:	COSPCL09a_B	Silver Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPCL09a_C	Mainstem of Fall River from the source to the confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COSPCL09b	9b. Mainstem of Trail Creek, including all tributaries and wetlands from the source to the confluence with Clear Creek.
Listed portion:	COSPCL09b_A	Mainstem of Trail Creek, including all tributaries and wetlands from the source to the confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
COSPCL10	10. Mainstem of Chicago Creek, including all tributaries and wetlands, from the source to the confluence with Clear Creek, except for listings in Segment 19.
Listed portion:	COSPCL10_A	Mainstem of Chicago Creek, including all tributaries and wetlands, from the source to the confluence with Clear Creek, except for listings in Segment 19.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COSPCL11	11. Mainstem of Clear Creek from a point just above the Argo Tunnel discharge to the Farmers Highline Canal diversion in Golden, Colorado.
Listed portion:	COSPCL11_A	Mainstem of Clear Creek from a point just above the Argo Tunnel discharge to the Farmers Highline Canal diversion in Golden, Colorado.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Temperature	5. - 303(d) List	H
COSPCL12a	12a. All tributaries to Clear Creek, including all wetlands, from the Argo Tunnel discharge to the Farmers Highline Canal diversion in Golden, Colorado, except for listings in Segments 12b, 13a and 13b.
Listed portion:	COSPCL12a_A	All tributaries to Clear Creek, including all wetlands, from the Argo Tunnel discharge to the Farmers Highline Canal diversion in Golden, Colorado, except for Gilson Gulch and listings in Segments 12b, 13a, and 13b.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Listed portion:	COSPCL12a_B	Gilson Gulch and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Nickel (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Lead (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
Water Supply Use	Lead (Total)	5. - 303(d) List	L
Water Supply Use	Nickel (Total)	5. - 303(d) List	L
COSPCL13a	13a. Mainstem of North Clear Creek, including all tributaries and wetlands, from its source to its confluence with Chase Gulch, and Four Mile Gulch, including all tributaries and wetlands, from their sources to their confluence with North Clear Creek and Eureka Gulch, including all tributaries and wetlands, from its source to its confluence with Gregory Gulch.
Listed portion:	COSPCL13a_C	Chase Gulch, including all tributaries and wetlands, from its source to its confluence with North Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COSPCL13b	13b. Mainstem of North Clear Creek including all tributaries and wetlands from a point just below the confluence with Chase Gulch to the confluence with Clear Creek, except for the listings in Segment 13a.
Listed portion:	COSPCL13b_B	Mainstem of North Clear Creek from a point just below the confluence with Chase Gulch to the confluence with Clear Creek, except for the listings in Segment 13a.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Manganese (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Aquatic Life Use	Temperature	5. - 303(d) List	M
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Listed portion:	COSPCL13b_C	Gregory Gulch, Russell Gulch, and Silver Gulch, including all tributaries and wetlands, from their sources to their confluences with North Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	4a. - TMDL	N/A
Aquatic Life Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
Listed portion:	COSPCL13b_D	All tributaries and wetlands to North Clear Creek from a point just below the confluence with Chase Gulch to the confluence with Clear Creek, except for Gregory Gulch, Russell Guclh, Silver Gulch, and the listings in Segment 13a.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	4a. - TMDL	N/A
Aquatic Life Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
COSPCL14a	14a. Mainstem of Clear Creek from the Farmers Highline Canal diversion in Golden, Colorado to the Denver Water conduit #16 crossing.
Listed portion:	COSPCL14a_A	Mainstem of Clear Creek from the Farmers Highline Canal diversion in Golden, Colorado to Croke Canal Diversion, and from McIntyre St. to the Denver Water conduit #16 crossing.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Ammonia	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	M
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Listed portion:	COSPCL14a_B	Mainstem of Clear Creek from Croke Canal Diversion to McIntyre Street.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	M
COSPCL14b	14b. Mainstem of Clear Creek from the Denver Water conduit #16 crossing to a point just below Youngfield Street in Wheat Ridge, Colorado.
Listed portion:	COSPCL14b_A	Mainstem of Clear Creek from the Denver Water conduit #16 crossing to a point just below Youngfield Street in Wheat Ridge, Colorado.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Organic Sediment	5. - 303(d) List	L
COSPCL15	15. Mainstem of Clear Creek from Youngfield Street in Wheat Ridge, Colorado, to the confluence with the South Platte River.
Listed portion:	COSPCL15_B	Mainstem of Clear Creek from Youngfield Street in Wheat Ridge, Colorado, to Wadsworth Blvd (39.7845, -105.0814).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Ammonia	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	L
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Organic Sediment	5. - 303(d) List	L
Listed portion:	COSPCL15_C	Mainstem of Clear Creek from Wadsworth Blvd (39.2492, -105.6608) to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	L
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Organic Sediment	5. - 303(d) List	L
COSPCL16a	16a. Mainstem of Lena Gulch including all tributaries and wetlands from its source to the inlet of Maple Grove Reservoir.
Listed portion:	COSPCL16a_A	Mainstem of Lena Gulch including all tributaries and wetlands from its source to the inlet of Maple Grove Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
COSPCL17a	17a. Arvada Reservoir.
Listed portion:	COSPCL17a_A	Arvada Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COSPCL17b	17b. Mainstem of Ralston Creek, including all tributaries and wetlands, from the source to the inlet of Arvada Reservoir.
Listed portion:	COSPCL17b_A	Mainstem of Ralston Creek, including all tributaries and wetlands, from the source to the inlet of Arvada Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
COSPCL18a	18a. Mainstem of Ralston Creek, including all tributaries and wetlands, from the outlet of Arvada Reservoir to the confluence with Clear Creek.
Listed portion:	COSPCL18a_A	Mainstem of Ralston Creek, including all tributaries and wetlands, from the outlet of Arvada Reservoir to the confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
COSPCL18b	18b. Mainstem of Leyden Creek and Van Bibber Creek from their source to their confluence with Ralston Creek. Mainstem of Little Dry Creek from its source to its confluence with Clear Creek.
Listed portion:	COSPCL18b_A	Mainstem of Leyden Creek and Van Bibber Creek from their source to their confluence with Ralston Creek. Mainstem of Little Dry Creek from its source to its confluence with Clear Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COSPCP02a	2a. Mainstem of the Cache La Poudre River, including all tributaries and wetlands, from the boundaries of Rocky Mountain National Park and the Rawah, Neota, Comanche Peak, and Cache La Poudre Wilderness Areas to a point immediately below the confluence with the South Fork Cache La Poudre River.
Listed portion:	COSPCP02a_B	Mainstem of the Cache La Poudre River from the boundaries of Rocky Mountain National Park, and the Rawah, Neota, Comanche Peak, and Cache La Poudre Wilderness Areas to a point immediately below the confluence with the South Fork Cache La Poudre River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Pr	ovisional) 5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COSPCP02a_C	All tributaries and wetlands of the Cache la Poudre River from the boundaries of Rocky Mountain National Park, and the Rawah, Neota, Comanche Peak, and Cache La Poudre Wilderness Areas to a point immediately below the confluence with the South Fork Cache La Poudre River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COSPCP03	3. Elkhorn Creek, including all tributaries and wetlands, from the source to a point immediately above the confluence with Manhattan Creek.
Listed portion:	COSPCP03_B	Elkhorn Creek, including all tributaries and wetlands, from the source to a point immediately above the confluence with Manhattan Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPCP06	6. North Fork of the Cache La Poudre River, including all tributaries and wetlands, from the source to the inlet of Halligan Reservoir.
Listed portion:	COSPCP06_A	North Fork of the Cache La Poudre River, including all tributaries and wetlands, from the source to the inlet of Halligan Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPCP07	7. North Fork of the Cache La Poudre River, including all tributaries and wetlands, from the inlet of Halligan Reservoir to the confluence with the Cache La Poudre River, except for listings in segments 8 and 20.
Listed portion:	COSPCP07_C	Mainstem of the North Fork of the Cache la Poudre River, including wetlands, from immediately below the outlet of Halligan Reservoir to a point five miles downstream.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	4a. - TMDL	N/A
Aquatic Life Use	Silver (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPCP07_D	Tributaries to the North Fork of the Cache La Poudre River, including wetlands, from the inlet of Halligan Reservoir to the confluence with the Cache La Poudre River, except Lone Pine Creek, Rabbit Creek, and listings in segments 8 and 20.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPCP07_E	Mainstem of the North Fork of the Cache la Poudre River from a point five miles downstream of Halligan Reservoir to Seaman Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPCP07_F	Mainstem of the North Fork of the Cache la Poudre River from below Seaman Reservoir to the confluence with the Cache La Poudre River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	M
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPCP07_G	Mainstem of Lone Pine Creek, including wetlands, from the confluence of North Fork Lone Pine Creek and South Fork Lone Pine Creek to the confluence with the North Fork of the Cache La Poudre River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPCP07_H	Mainstem of Rabbit Creek, including wetlands, from the source to the confluence with the North Fork of the Cache La Poudre River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPCP08	8. Middle Fork Rabbit Creek, including all tributaries and wetlands, from the source to the confluence with Rabbit Creek. Stonewall Creek, including all tributaries and wetlands, from the source to the confluence with the North Fork of the Cache La Poudre River. North Fork Lone Pine Creek and South Fork Lone Pine Creek, including all tributaries and wetlands, from the source to the confluence with Lone Pine Creek.
Listed portion:	COSPCP08_B	Middle Fork of Rabbit Creek, including all tributaries and wetlands, from the source to the confluence with Rabbit Creek. Stonewall Creek, including all tributaries and wetlands, from the source to the confluence with the North Fork of the Cache La Poudre River. North Fork Lone Pine Creek and South Fork Lone Pine Creek, including all tributaries and wetlands, from the source to the confluence with Lone Pine Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPCP10a	10a. Mainstem of the Cache La Poudre River from the Munroe Gravity Canal Headgate (also known as the North Poudre Supply Canal diversion; 40.691700, -105.255292) to a point immediately above the Larimer County Ditch diversion (40.656612, -105.185244).
Listed portion:	COSPCP10a_A	Mainstem of the Cache La Poudre River from the Munroe Gravity Canal Headgate (also known as the North Poudre Supply Canal diversion; 40.691700, -105.255292) to a point immediately above the Larimer County Ditch diversion (40.656612, -105.185244).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
COSPCP10b	10b. Mainstem of the Cache La Poudre River from a point immediately above the Larimer County Ditch diversion (40.656612, -105.185244) to Shields Street in Ft. Collins, Colorado.
Listed portion:	COSPCP10b_A	Mainstem of the Cache La Poudre River from a point immediately above the Larimer County Ditch diversion (40.656612, -105.185244) to Shields Street in Ft. Collins, Colorado.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPCP11	11. Mainstem of the Cache La Poudre River from Shields Street in Ft. Collins to Prospect Road.
Listed portion:	COSPCP11_B	Mainstem of the Cache La Poudre River from Shields Street in Ft. Collins to Prospect Road.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	L
COSPCP12a	12a. Mainstem of the Cache La Poudre River from Prospect Road to U.S. Hwy 85 in Greeley.
Listed portion:	COSPCP12a_A	Mainstem of the Cache La Poudre River from Boxelder Creek to US Hwy 85 in Greeley.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Listed portion:	COSPCP12a_B	Mainstem of the Cache La Poudre River from Prospect Road to Boxelder Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	L
COSPCP12b	12b. Mainstem of the Cache La Poudre River from U.S. Hwy 85 in Greeley to the confluence with the South Platte River.
Listed portion:	COSPCP12b_A	Mainstem of the Cache La Poudre River from U.S. Hwy 85 in Greeley to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
COSPCP13a	13a. All tributaries to the Cache La Poudre River, including all wetlands, from the Munroe Gravity Canal Headgate (also known as the North Poudre Supply Canal diversion; 40.691700, -105.255292) to the confluence with the South Platte River, except for listings in segments 6, 7, 8, 13b, and 13c.
Listed portion:	COSPCP13a_B	Dry Creek and all tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Listed portion:	COSPCP13a_D	Spring Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Listed portion:	COSPCP13a_E	Fossil Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
COSPCP13b	13b. Mainstem of Boxelder Creek from its source to a point immediately above Slab Canyon Wash. Mainstems of South Branch of Boxelder Creek, North Branch of Boxelder Creek, and Sand Creek from their sources to their confluences with the mainstem of Boxelder Creek.
Listed portion:	COSPCP13b_C	Mainstem of Boxelder Creek from its source to a point immediately above Slab Canyon Wash.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Recreational Use	E. coli	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COSPCP13c	13c. Mainstem of Boxelder Creek from a point immediately above Slab Canyon Wash to the confluence with the Cache La Poudre River.
Listed portion:	COSPCP13c_B	Mainstem of Boxelder Creek from a point immediately above Slab Canyon Wash to the confluence with the Cache La Poudre River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Recreational Use	E. coli	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COSPCP14	14. Horsetooth Reservoir.
Listed portion:	COSPCP14_A	Horsetooth Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COSPCP20	20. All lakes and reservoirs tributary to the North Fork of the Cache La Poudre River from the inlet of Halligan Reservoir to the confluence with the Cache La Poudre River. This segment includes Halligan Reservoir and Seaman Reservoir.
Listed portion:	COSPCP20_B	Seaman Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
COSPLA02a	2a. Mainstem of the Laramie River from the source to the National Forest boundary, and all tributaries and wetlands from the source to the Colorado/Wyoming border, except for listings in Segment 1.
Listed portion:	COSPLA02a_A	Mainstem of the Laramie River from the source to the National Forest boundary, and all tributaries and wetlands from the source to the Colorado/Wyoming border, except for listings in Segment 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
COSPLA02b	2b. Mainstem of the Laramie River from the National Forest boundary to the Colorado/Wyoming border.
Listed portion:	COSPLA02b_A	Mainstem of the Laramie River from the National Forest boundary to the Colorado/Wyoming border.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COSPLS01a	1a. Mainstem of the South Platte River from the Weld/Morgan County line to the Morgan/Washington County line.
Listed portion:	COSPLS01a_A	Mainstem of the South Platte River from the Weld/Morgan County line to the Morgan/Washington County line.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPLS01b_A	Mainstem of the South Platte River from the Morgan/Washington County line to the Colorado/Nebraska border.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Uranium (Total)	5. - 303(d) List	H
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPLS02	2. All tributaries to the South Platte River, including all wetlands, from the Weld/Morgan County line to the Colorado/Nebraska border.
Listed portion:	COSPLS02_B	Beaver Creek from the source to South Platte River, except for the portion of Beaver Creek from its source to the Fort Morgan Canal.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPLS02_C	Kiowa Creek and its tributaries from the source to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
COSPLS03	3. Jackson Reservoir, Prewitt Reservoir, North Sterling Reservoir, Jumbo (Julesburg), Empire Reservoir, Vancil Reservoir.
Listed portion:	COSPLS03_B	North Sterling Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPLS03_C	Jumbo Reservoir (Julesburg Reservoir).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Listed portion:	COSPLS03_D	Jackson Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
COSPMS01a	1a. Mainstem of the South Platte River from a point immediately below the confluence with Big Dry Creek to the confluence with St. Vrain Creek.
Listed portion:	COSPMS01a_A	Mainstem of the South Platte River from a point immediately below the confluence with Big Dry Creek to the confluence with St. Vrain Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPMS01b	1b. Mainstem of the South Platte River from a point immediately below the confluence with St. Vrain Creek to the Weld/Morgan County Line.
Listed portion:	COSPMS01b_A	Mainstem of the South Platte River from a point immediately below the confluence with St. Vrain Creek to the Weld/Morgan County Line.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Nitrate	3b. - M&E List	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPMS04	4. Barr Lake and Milton Reservoir.
Listed portion:	COSPMS04_A	Barr Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPMS04_B	Milton Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPMS05a	5a. Mainstem of Lone Tree Creek from the source to the confluence with the South Platte River.
Listed portion:	COSPMS05a_A	Mainstem of Lone Tree Creek from the source to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Nitrate	5. - 303(d) List	H
COSPMS05c	5c. Mainstems of Crow Creek and Box Elder Creek from their sources to their confluences with the South Platte River, except for listings in Segment 5b.
Listed portion:	COSPMS05c_A	Mainstems of Crow Creek and Box Elder Creek from their sources to their confluences with the South Platte River, except for listings in Segment 5b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	M
COSPMS07	7. All lakes and reservoirs tributary to the South Platte River from a point immediately below the confluence with Big Dry Creek to the Weld/Morgan County line, except for listings in the subbasins of the South Platte River, and in segments 4 and 8.
Listed portion:	COSPMS07_B	Prospect Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	L
Listed portion:	COSPMS07_C	Horse Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	M
COSPRE01	1. Mainstem of the South Fork of the Republican River from a point 23 miles above the Colorado/Kansas border (39.582154, -102.350838) to the Colorado/Kansas border.
Listed portion:	COSPRE01_A	Mainstem of the South Fork of the Republican River from a point 23 miles above the Colorado/Kansas border (39.582154, -102.350838) to the Colorado/Kansas border.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Lead (Dissolved)	5. - 303(d) List	H
COSPRE03	3. Mainstem of the North Fork of the Republican River from the source to the Colorado/Nebraska border. Mainstem of Chief Creek from the source to the confluence with the North Fork of the Republican River.
Listed portion:	COSPRE03_A	Mainstem of the North Fork of the Republican River from the source to the Colorado/Nebraska border. Mainstem of Chief Creek from the source to the confluence with the North Fork of the Republican River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPRE05	5. Mainstem of Black Wolf Creek from the source to the confluence with the Arikaree River.
Listed portion:	COSPRE05_A	Mainstem of the Black Wolf Creek from the source to the confluence with the Arikaree River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
COSPSV01	1. All tributaries to St. Vrain Creek, including all wetlands, which are within the Indian Peaks Wilderness Area and Rocky Mountain National Park.
Listed portion:	COSPSV01_B	Mainstem of South St. Vrain Creek, including all wetlands, which are within the Indian Peaks Wilderness Area and Rocky Mountain National Park.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Provisi	onal) 5. - 303(d) List	H
Listed portion:	COSPSV01_C	All tributaries to St. Vrain Creek, including all wetlands, which are within the Indian Peaks Wilderness Area and Rocky Mountain National Park, except for the maintsem of South St. Vrain.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	H
COSPSV02a	2a. Mainstem of St. Vrain Creek, including all tributaries and wetlands, from the boundary of the Indian Peaks Wilderness Area and Rocky Mountain National Park to the eastern boundary of Roosevelt National Forest.
Listed portion:	COSPSV02a_A	Mainstem of St. Vrain Creek, including all tributaries and wetlands, from the boundary of the Indian Peaks Wilderness Area and Rocky Mountain National Park to the eastern boundary of Roosevelt National Forest.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSPSV02b	2b. Mainstem of St. Vrain Creek, including all tributaries and wetlands, from the eastern boundary of Roosevelt National Forest to Hygiene Road.
Listed portion:	COSPSV02b_A	Mainstem of St. Vrain Creek, including all tributaries and wetlands, from the eastern boundary of Roosevelt National Forest to Hygiene Road. Except part of South Saint Vrain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPSV02b_B	South Saint Vrain Creek from just below its confluence with Red Hill Gulch to its confluence with North Saint Vrain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COSPSV03	3. Mainstem of St. Vrain Creek from Hygiene Road to the confluence with the South Platte River.
Listed portion:	COSPSV03_B	Mainstem of St. Vrain Creek from the confluence with Left Hand Creek to the confluence with Boulder Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	4a. - TMDL	N/A
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPSV03_C	Mainstem of St. Vrain Creek from Hover Road to Left Hand Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPSV03_D	Mainstem of St. Vrain Creek from Hygiene Road to Hover Road and St. Vrain Creek from I-25 to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPSV03_E	Mainstem of St. Vrain Creek from Boulder Creek to I-25.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	4a. - TMDL	N/A
Recreational Use	E. coli	5. - 303(d) List	H
COSPSV04a	4a. Mainstem of Left Hand Creek, including all tributaries and wetlands, from the source to a point immediately below the confluence with James Creek, except for specific listings in Segment 4b.
Listed portion:	COSPSV04a_A	Mainstem of Left Hand Creek, including all tributaries and wetlands, from the source to Hwy 72, except for specific listings in Segment 4b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Listed portion:	COSPSV04a_B	Mainstem of Left Hand Creek, including all tributaries and wetlands from Hwy 72 to James Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COSPSV04b	4b. Mainstem of James Creek, including all tributaries and wetlands, from the source to the confluence with Left Hand Creek.
Listed portion:	COSPSV04b_A	Mainstem of James Creek, including all tributaries and wetlands, from the source to the confluence with Left Hand Creek, excluding Little James Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	pH	5. - 303(d) List	H
Listed portion:	COSPSV04b_B	Little James Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSPSV04c	4c. Mainstem of Left Hand Creek, including all tributaries and wetlands, from a point immediately below the confluence with James Creek to Highway 36.
Listed portion:	COSPSV04c_A	Mainstem of Left Hand Creek, including all tributaries and wetlands, from a point immediately below the confluence with James Creek to Highway 36.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
COSPSV05	5. Mainstem of Left Hand Creek, including all tributaries and wetlands from Highway 36 to the confluence with St. Vrain Creek.
Listed portion:	COSPSV05_A	Mainstem of Left Hand Creek, including all tributaries and wetlands from a point above the Boulder Feeder Canal to the confluence with St. Vrain Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPSV05_B	Mainstem of Left Hand Creek, including all tributaries and wetlands from Highway 36 to a point above the Boulder Feeder Canal.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	M
COSPSV06a	6a. All tributaries to Dry Creek, including wetlands, from the source to the inlet of Boulder Reservoir.
Listed portion:	COSPSV06a_A	All tributaries to Dry Creek, including wetlands, from the source to the inlet of Boulder Reservior, except Little Dry Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Listed portion:	COSPSV06a_B	Little Dry Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
COSPSV06b	6b. All tributaries to St. Vrain Creek, including wetlands from Hygiene Road to the confluence with the South Platte River, except for specific listings in the Boulder Creek subbasin and in Segments 4a, 4b, 4c and 5 and 6a.
Listed portion:	COSPSV06b_B	Dry Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COSPSV07	7. Boulder Reservoir, Coot Lake, Left Hand Valley Reservoir and Spurgeon Reservoir.
Listed portion:	COSPSV07_B	Boulder Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPUS01a	1a. Mainstem of the South Platte River from the source of the South and Middle Forks to the inlet of Cheesman Reservoir.
Listed portion:	COSPUS01a_A	Mainstem of the South Platte River from the source of the South and Middle Forks to the Elevenmile Reservoir, except for the Middle Fork South Platte River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS01a_B	Middle Fork South Platte River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSPUS01a_C	South Platte River from the outlet of Elevenmile Reservoir to the Idlewilde picnic area.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS01a_D	South Fork of the South Platte from Antero Reservoir to the confluence with the Middle Fork of the South Platte. Was Listed incorrectly in Reg. 93 as COSPUS02a.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS01a_E	South Platte River from Idlewilde picnic area to Cheesman Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPUS01b	1b. All tributaries to the South Platte River, including wetlands within the Lost Creek and Mt. Evans Wilderness Areas.
Listed portion:	COSPUS01b_C	Hankins Gulch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSPUS02a	2a. All tributaries to the South Platte River system, including all wetlands from the headwaters of the South and Middle Forks to a point immediately below the confluence with Tarryall Creek except for listings in Segment 1b, 2b and 2c.
Listed portion:	COSPUS02a_B	Twin Creek, on USFS Land.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	COSPUS02a_E	All tributaries to the South Platte River system, including all wetlands from the headwaters of the South and Middle Forks to a point immediately below the confluence with Tarryall Creek except for Snyder Creek and for specific listings in Segment 1b, 2b and 2c.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSPUS02a_F	Snyder Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COSPUS02b	2b. Mainstem of Mosquito Creek from Road #698 (39.270971, -106.098846) to its confluence with the Middle Fork of the South Platte River.
Listed portion:	COSPUS02b_B	Mainstem of Mosquito Creek from Road #698 (39.270971, -106.098846) to its confluence with the Middle Fork of the South Platte River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
COSPUS02c	2c. South Mosquito Creek from the source to confluence with Mosquito Creek, Mosquito Creek from the confluence with South Mosquito Creek to Road #698 (39.270971, -106.098846), and No Name Creek from the source to the confluence with South Mosquito Creek.
Listed portion:	COSPUS02c_A	No Name Creek from the source to the confluence with South Mosquito Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Listed portion:	COSPUS02c_C	South Mosquito Creek from the London Mine to confluence with Mosquito Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Iron (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Listed portion:	COSPUS02c_D	South Mosquito Creek from the source to the London Mine.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Iron (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Manganese (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Listed portion:	COSPUS02c_E	Mosquito Creek from the confluence with South Mosquito Creek to Road #698 (39.27901, -106.098846).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
COSPUS03	3. All tributaries to the South Platte River, including all wetlands from a point immediately below the confluence with Tarryall Creek to a point immediately above the confluence with the North Fork of the South Platte River, except for listings in Segment 1b.
Listed portion:	COSPUS03_B	Trout Creek and tributaries on USFS property.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPUS03_C	Pine Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS03_D	Fourmile Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Mercury (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS03_E	Horse Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS03_F	West Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Mercury (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	COSPUS03_G	Wigwam Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSPUS03_H	Goose Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COSPUS04	4. Mainstem of the North Fork of the South Platte River, including all tributaries and wetlands from the source to the confluence with the South Platte River, except for listings in Segments 1b, 5a, 5b, and 5c.
Listed portion:	COSPUS04_C	Mainstem of the North Fork of the South Platte River, including all tributaries and wetlands from the source to the confluence with Sawmill Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
Aquatic Life Use	Sediment	5. - 303(d) List	H
Listed portion:	COSPUS04_E	Mainstem of North Fork of the South Platte River, including all tributaries and wetlands from Sawmill Gulch to Geneva Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
Aquatic Life Use	Sediment	5. - 303(d) List	H
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COSPUS04_F	Mainstem of the North Fork of the South Platte River, including all tributaries and wetlands from Geneva Creek to the confluence with the South Platte River, except for listings in Segments 1b, 5a, 5b, and 5c.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Recreational Use	E. coli	5. - 303(d) List	H
COSPUS05a	5a. Mainstem of Geneva Creek from the source to the confluence with Scott Gomer Creek.
Listed portion:	COSPUS05a_A	Mainstem of Geneva Creek from the source to the confluence with Scott Gomer Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Total)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COSPUS05b	5b. Mainstem of Geneva Creek from the confluence with Scott Gomer Creek to the confluence with the North Fork of the South Platte River; all tributaries of Geneva Creek including wetlands from source to confluence with the North Fork of the South Platte River.
Listed portion:	COSPUS05b_A	All tributaries of Geneva Creek including wetlands from source to confluence with the North Fork of the South Platte River. Excludes Geneva Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Listed portion:	COSPUS05b_B	Mainstem of Geneva Creek from the confluence with Scott Gomer Creek to the confluence with the North Fork of the South Platte River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COSPUS05c	5c. Mainstem of Gooseberry Gulch and all tributaries from source to Sunset Trail.
Listed portion:	COSPUS05c_B	Unnamed Tributary to Gooseberry Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	5. - 303(d) List	M
COSPUS06a	6a. Mainstem of the South Platte River from the outlet of Cheesman Reservoir to the inlet of Chatfield Reservoir.
Listed portion:	COSPUS06a_A	Mainstem of the South Platte River from the Lazy Gulch to the inlet of Chatfield Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSPUS06a_B	South Platte River from outlet of Cheesman Reservoir to Lazy Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisi	onal) 5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPUS06b	6b. Chatfield Reservoir
Listed portion:	COSPUS06b_A	Chatfield Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COSPUS07	7. All tributaries to the South Platte River, including all wetlands from a point immediately below the confluence with the North Fork of the South Platte River to the outlet of Chatfield Reservoir except for listings in Segments 8, 9, 10, 11, 12, and 13.
Listed portion:	COSPUS07_B	Willow Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COSPUS09	9. Mainstem of Bear Creek, including all tributaries and wetlands from the source to the inlet of Perry Park Reservoir, a.k.a. Waucondah Reservoir (Douglas County).
Listed portion:	COSPUS09_B	Mainstem of Bear Creek from the source to the inlet of Perry Park Reservoir (Douglas County).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
COSPUS10	10. Mainstems of East Plum Creek, West Plum Creek, and Plum Creek from the boundary of National Forest lands to Chatfield Reservoir, mainstems of Stark Creek and Gove Creek from the boundary of National Forest lands to their confluence.
Listed portion:	COSPUS10_B	Mainstem of West Plum Creek from the boundary of National Forest lands to Chatfield Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COSPUS10_C	Mainstem of East Plum Creek from the boundary of National Forest lands to Chatfield Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS10_D	Mainstem of Plum Creek from the confluence with East and West Plum Creek to Chatfield Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COSPUS11a	11a. All tributaries to the East Plum Creek system, including all wetlands which are not on national forest lands.
Listed portion:	COSPUS11a_A	All tributaries to the East Plum Creek system, including all wetlands which are not on national forest lands. Excludes Cook Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	pH	3b. - M&E List	N/A
COSPUS11b	11b. All tributaries to the West Plum Creek system, including all wetlands, which are not on national forest lands, except for listings in Segments 9 and 12.
Listed portion:	COSPUS11b_B	Spring Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
COSPUS12	12. Mainstem of Garber Creek and Jackson Creek from the boundary of National Forest lands to the confluence with West Plum Creek; mainstem of Bear Creek from the outlet of Perry Park Reservoir, a.k.a. Waucondah Reservoir, to the confluence with West Plum Creek.
Listed portion:	COSPUS12_A	Mainstem of Garber Creek from the boundary of National Forest lands to the confluence with West Plum Creek; mainstem of Bear Creek from the outlet of Perry Park Reservoir, a.k.a. Waucondah Reservoir, to the confluence with West Plum Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COSPUS12_B	Jackson Creek from the boundary of National Forest lands to the confluence with West Plum Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COSPUS14	14. Mainstem of the South Platte River from the outlet of Chatfield Reservoir to the Burlington Ditch diversion in Denver, Colorado.
Listed portion:	COSPUS14_B	Mainstem of the South Platte River from Bowles Ave. to the Burlington Ditch diversion in Denver, Colorado.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COSPUS14_C	Mainstem of the South Platte River from the outlet of Chatfield Reservoir to Bowles Ave.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Recreational Use	E. coli	5. - 303(d) List	H
COSPUS15	15. Mainstem of the South Platte River from the Burlington Ditch diversion in Denver, Colorado, to a point immediately below the confluence with Big Dry Creek.
Listed portion:	COSPUS15_B	Mainstem of the South Platte River from the Burlington Ditch diversion in Denver, Colorado to Sand Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Recreational Use	E. coli	4a. - TMDL	N/A
Aquatic Life Use	Ammonia	4b. - 4b plan	N/A
Water Supply Use	Sulfate	5. - 303(d) List	L
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
Listed portion:	COSPUS15_C	Mainstem of the South Platte River from Sand Creek, to 180 meters below 120th Ave.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli	4a. - TMDL	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Ammonia	4b. - 4b plan	N/A
Listed portion:	COSPUS15_D	Mainstem of the South Platte River from 180 meters below 120th Ave, to a point immediately below the confluence with Big Dry Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Recreational Use	E. coli	4a. - TMDL	N/A
Aquatic Life Use	Ammonia	4b. - 4b plan	N/A
COSPUS16a	16a. Mainstem of Sand Creek from the confluence of Murphy and Coal Creek in Arapahoe County to the confluence with the Toll Gate Creek.
Listed portion:	COSPUS16a_A	Mainstem of Sand Creek from the confluence of Murphy and Coal Creek in Arapahoe County to the confluence with the Toll Gate Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COSPUS16c	16c. All tributaries to the South Platte River, including all wetlands, from the outlet of Chatfield Reservoir, to a point immediately below the confluence with Big Dry Creek, except for listings in the subbasins of the South Platte River, and in Segments 16a, 16d, 16e, 16f, 16g, 16h, 16i, 16j, and 16k.
Listed portion:	COSPUS16c_A	All tributaries to the South Platte River, including all wetlands, from the outlet of Chatfield Reservoir, to a point immediately below the confluence with Big Dry Creek, except for listings in the subbasins of the South Platte River, and in Segments 16a, 16d, 16e, 16f, 16g, 16h, 16i, 16j, and 16k.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli (May-October)	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COSPUS16g	16g. Marcy Gulch, including all wetlands from the source to the confluence with the South Platte.
Listed portion:	COSPUS16g_A	Marcy Gulch, including all wetlands from the source to the confluence with the South Platte.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
COSPUS16i	16i. Mainstem of Sand Creek from the confluence with Toll Gate Creek to the confluence with the South Platte River.
Listed portion:	COSPUS16i_A	Mainstem of Sand Creek from the confluence with Toll Gate Creek to the confluence with Westerly Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COSPUS16i_B	Mainstem Sand Creek from the confluence with Westerly Creek to the confluence with the South Platte River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COSPUS17a	17a. Washington Park Lakes, City Park Lakes, Rocky Mountain Lake, Berkely Lake.
Listed portion:	COSPUS17a_B	Duck Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Listed portion:	COSPUS17a_C	Ferril Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Listed portion:	COSPUS17a_D	Berkeley Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Listed portion:	COSPUS17a_E	Rocky Mountain Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Aquatic Life Use	pH	5. - 303(d) List	L
Listed portion:	COSPUS17a_F	Smith Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
COSPUS17b	17b. Sloan?s Lake.
Listed portion:	COSPUS17b_A	Sloan's Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COSPUS19	19. Lakes and reservoirs in the South Platte River system from headwaters to Chatfield Reservoir, except for listings in Segment 18. Includes Antero, Spinney Mountain, Elevenmile, Cheesman, and Strontia Springs.
Listed portion:	COSPUS19_B	Cheesman Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	3b. - M&E List	N/A
COSPUS23	23. Lakes and reservoirs in watersheds tributary to the Upper South Platte River and within the City and County of Denver, except for listings in the other subbasins of the South Platte River and in Segments 17a and 17b.
Listed portion:	COSPUS23_B	Barnum Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	L
Listed portion:	COSPUS23_C	Vanderbilt Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
Listed portion:	COSPUS23_D	Garfield Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COSPUS23_E	Harvey Lake.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Listed portion:	COSPUS23_F	Aqua Golf.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	5. - 303(d) List	M
Aquatic Life Use	pH	5. - 303(d) List	M
Listed portion:	COSPUS23_G	Parkfield Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	M
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
Listed portion:	COSPUS23_H	Overland Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
Listed portion:	COSPUS23_I	Houston Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	M
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
COUCBL01	1. Mainstem of the Blue River from the source to above the confluence with French Gulch.
Listed portion:	COUCBL01_A	Mainstem of the Blue River from the source to above the confluence with French Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCBL02a	2a. Mainstem of the Blue River from above the confluence with French Gulch to a point one half mile below Coyne Valley Road (39.523189, -106.050805).
Listed portion:	COUCBL02a_A	Blue River from South Barton Gulch to one half mile below Summit County Road 3.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Cadmium (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Water Supply Use	Cadmium (Total)	5. - 303(d) List	L
Aquatic Life Use	Nitrite	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCBL02a_B	Blue River from the confluence with French Gulch to South Barton Gulch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
COUCBL02b	2b. Mainstem of the Blue River from a point one half mile below Coyne Valley Road (39.523189, -106.050805) to above the confluence with the Swan River.
Listed portion:	COUCBL02b_A	Mainstem of the Blue River from a point one half mile below Summit County Road 3 to the confluence with the Swan River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisio	nal) 5. - 303(d) List	L
COUCBL02c	2c. Mainstem of the Blue River from above the confluence with the Swan River to Dillon Reservoir.
Listed portion:	COUCBL02c_A	Mainstem of the Blue River from above the confluence with the Swan River to Dillon Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	L
COUCBL04a	4a. All direct tributaries, including wetlands, to Dillon Reservoir and all tributaries, including wetlands, to the Blue River above Dillon Reservoir, except for specific listings in Segments 1, 2a, 2b, 2c, 4b, 6a, 10-14 and 16.
Listed portion:	COUCBL04a_B	Gold Run Gulch below Jessie Mine.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCBL04a_C	Meadow Creek and its tributaries not in the wilderness.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Listed portion:	COUCBL04a_D	Mainstem of Soda Creek from the source to Dillon Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates (Provisio	nal) 5. - 303(d) List	L
COUCBL06a	6a. Mainstem of the Snake River, including all tributaries and wetlands, from the source to Dillon Reservoir, except for specific listings in Segments 6b, 7, 8 and 9.
Listed portion:	COUCBL06a_B	Mainstem of the Snake River from the source to Dillon Reservoir, including Saint John Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Listed portion:	COUCBL06a_C	All tributaries and wetlands of the Snake River from the source to Dillon Reservoir, except for specific listings in Segments 6b, 7, 8, 9, and Saint John Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
COUCBL07	7. Mainstem of Peru Creek, including all tributaries and wetlands, from the source to the confluence with the Snake River, except for specific listings in Segment 8.
Listed portion:	COUCBL07_A	Mainstem of Peru Creek, including all tributaries and wetlands from the source to the confluence with the Snake River, except for specific listings in Segment 8.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Copper (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Manganese (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Lead (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	pH	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
COUCBL11	11. Mainstem of French Gulch from a point 1.5 miles below Lincoln (39.484661, -105.995074) to the confluence with the Blue River.
Listed portion:	COUCBL11_A	Mainstem of French Gulch from a point 1.5 miles below Lincoln (39.484661, -105.995074) to the confluence with the Blue River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
COUCBL12	12. Mainstem of Illinois Gulch and Fredonia Gulch from their sources to their confluences with the Blue River.
Listed portion:	COUCBL12_B	Mainstem of Illinois Gulch from its source to the confluence with the Blue River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Cadmium (Dissolved)	4a. - TMDL	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
Listed portion:	COUCBL12_C	Mainstem of Fredonia Gulch from its source to the confluence with the Blue River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	M
COUCBL17	17. Mainstem of the Blue River from the outlet of Dillon Reservoir to the confluence with the Colorado River.
Listed portion:	COUCBL17_A	Blue River from outlet of Dillon Reservoir to Green Mountain Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCBL17_B	Blue River from Green Mountain Reservoir to confluence with Colorado River
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Mercury (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCBL18	18. All tributaries to the Blue River, including all wetlands, from the outlet of Dillon Reservoir to the outlet of Green Mountain Reservoir, except for the specific listings in Segment 16.
Listed portion:	COUCBL18_B	Straight Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provision	al) 5. - 303(d) List	H
COUCBL20	20. Mainstems of Elliot Creek and Spruce Creek, including all tributaries and wetlands, from their sources to the confluence with the Blue River.
Listed portion:	COUCBL20_B	Spruce Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCEA02	2. Mainstem of the Eagle River from the source to above the compressor house bridge at Belden (39.526879, -106.394950).
Listed portion:	COUCEA02_B	Mainstem of the Eagle River from the source to Peterson Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCEA02_C	Eagle River Below Peterson Creek to compressor house bridge at Belden.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCEA03	3. All tributaries to the Eagle River, including wetlands, from the source to above the compressor house bridge at Belden (39.526879, -106.394950), except for the specific listings in Segments 1 and 4.
Listed portion:	COUCEA03_A	All tributaries to the Eagle River, including wetlands, from the source to the compressor house bridge at Belden, except for the specific listing in Segment 4 and those waters included in Segment 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCEA05a	5a. Mainstem of the Eagle River from above the compressor house bridge at Belden (39.526879, -106.394950) to a point immediately above the Highway 24 Bridge near Tigiwon Road (39.554936, -106.401691).
Listed portion:	COUCEA05a_B	Mainstem of the Eagle River from the compressor house bridge in Belden to a point located 600 ft upstream of Rock Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Listed portion:	COUCEA05a_C	Mainstem of the Eagle River from a point located 600 ft upstream of Rock Creek to a point immediately above the Highway 24 Bridge near Tigiwon Road.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCEA05b	5b. Mainstem of the Eagle River from a point immediately above the Highway 24 Bridge near Tigiwon Road (39.554936, -106.401691) to a point immediately above the confluence with Martin Creek.
Listed portion:	COUCEA05b_A	Mainstem of the Eagle River from a point immediately above the Highway 24 Bridge near Tigiwon Road (39.554936, -106.401691) to a point immediately above the confluence with Martin Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCEA05c	5c. Mainstem of the Eagle River from a point immediately above Martin Creek to a point immediately above the confluence with Gore Creek.
Listed portion:	COUCEA05c_A	Mainstem of the Eagle River from a point immediately above Martin Creek to a point immediately above the confluence with Gore Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	4a. - TMDL	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	H
COUCEA06	6. All tributaries to the Eagle River, including all wetlands, from above the compressor house bridge at Belden (39.526879, -106.394950) to a point immediately below the confluence with Lake Creek, except for the specific listings in Segments 1, 7a, 7b, and 8.
Listed portion:	COUCEA06_C	Lake Creek from below the confluence with East and West Lake Creek to the mouth.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COUCEA06_D	Beaver Creek from confluence with Wayne Creek to Mouth.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COUCEA06_E	Red Sandstone Creek from USFS Boundary to north side I-70 Frontage Road.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCEA06_F	Red Sandstone Creek from north side I-70 Frontage Road to confluence with Gore Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COUCEA06_H	Black Gore Creek adjacent to I-70 above Miller Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
Listed portion:	COUCEA06_I	Rock Creek from the source to the confluence with the Eagle River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Aquatic Life Use	Cadmium (Dissolved)	5. - 303(d) List	H
Listed portion:	COUCEA06_J	All tributaries to the Eagle River, including all wetlands, from above the compressor house bridge at Belden (39.526879, -106.394950) to a point immediately below the confluence with Lake Creek, except for the specific listings in Segments 1, 7a, 7b, and 8. With other exceptions to Black Gore and Rock Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCEA06_K	Black Gore Creek from a point immediately below its confluence with Miller Creek to a point immediately above its confluence with Timber Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Sediment	5. - 303(d) List	H
Listed portion:	COUCEA06_L	Black Gore Creek from a point immediately below its confluence with Timber Creek to the confluence with Gore Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCEA07a	7a. Mainstem of Cross Creek from the source to below the Minturn Water Facility (39.565419, -106.417032), except for the specific listings in Segment 1.
Listed portion:	COUCEA07a_A	Mainstem of Cross Creek from the source to a point immediately below the Minturn Middle School, except for those waters included in Segment 1.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COUCEA08	8. Mainstem of Gore Creek from the confluence with Black Gore Creek to the confluence with the Eagle River.
Listed portion:	COUCEA08_A	Mainstem of Gore Creek from the confluence with Black Gore Creek to the confluence with the Eagle River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Pr	ovisional) 5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCEA09a	9a. Mainstem of the Eagle River from above Gore Creek to a point immediately below the confluence with Squaw Creek.
Listed portion:	COUCEA09a_A	Eagle River from Gore Creek to confluence with Berry Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCEA09a_B	Eagle River from confluence with Berry Creek to confluence with Squaw Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCEA09b	9b. Mainstem of the Eagle River from a point immediately below the confluence with Squaw Creek to a point immediately below the confluence with Rube Creek.
Listed portion:	COUCEA09b_B	Eagle River from Squaw Creek to Ute Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCEA09b_C	Eagle River from Ute Creek to Rube Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCEA09c	9c. Mainstem of the Eagle River from a point immediately below the confluence with Rube Creek to the confluence with the Colorado River.
Listed portion:	COUCEA09c_B	Mainstem of the Eagle River from a point immediately below the confluence with Rube Creek to Warren Gulch (39.6785, -106.7645).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COUCEA09c_C	Mainstem of the Eagle River from a point immediately below the confluence with Warren Gulch (39.6785, -106.7645) to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
COUCEA10a	10a. All tributaries to the Eagle River, including all wetlands, from a point immediately below the confluence with Lake Creek to the confluence with the Colorado River, except for specific listings in Segments 10b, 11 and 12, and those waters included in Segment 1.
Listed portion:	COUCEA10a_A	All tributaries to the Eagle River, including all wetlands, from a point immediately below the confluence with Lake Creek to the confluence with the Colorado River, except for specific listings in Segments 10b, 11 and 12, and those waters included in Segment 1.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	pH	3b. - M&E List	N/A
Listed portion:	COUCEA10a_B	Eby Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
COUCNP01	1. All tributaries to the North Platte and Encampment Rivers, including all wetlands, within the Mount Zirkel, Never Summer, and Platte River Wilderness Areas.
Listed portion:	COUCNP01_B	South Fork Big Creek and tributaries from source to the wilderness boundary.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCNP03	3. Mainstem of the North Platte River from the confluence of Grizzly Creek and Little Grizzly Creek to the Colorado/Wyoming border.
Listed portion:	COUCNP03_A	Mainstem of the North Platte River from the confluence of Grizzly Creek and Little Grizzly Creek to the Colorado/Wyoming border.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COUCNP04a	4a. All tributaries to the North Platte River, including all wetlands, from the source to the Colorado/Wyoming border, except for those tributaries included in Segments 1, 4b, 5a, 5b, 6, 7a and 7b.
Listed portion:	COUCNP04a_A	Tributaries to the North Platte River, including all wetlands, from the source to the Colorado/Wyoming border, except for those tributaries in Segments 1, 4b, 5a, 5b, 6, 7a and 7b, and except the Canadian and Illinois rivers and their tributaries as well as Grizzly, Little Grizzly, Lake, South Fork Big, Snyder, and North Sand creeks and their tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCNP04a_B	Canadian River and tributaries.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Listed portion:	COUCNP04a_C	Grizzly Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCNP04a_D	Little Grizzly Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCNP04a_E	Lake Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Listed portion:	COUCNP04a_F	Illinois River and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Listed portion:	COUCNP04a_G	South Fork Big Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCNP04a_H	Snyder Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	H
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
Listed portion:	COUCNP04a_I	North Sand Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Beneficial Use	Sediment	5. - 303(d) List	H
COUCNP04b	4b. Mainstem of the Illinois River, including all tributaries and wetlands, from a point immediately below the confluence with Indian Creek to the confluence with the Michigan River, except for specific listings in Segments 7a and 7b. Mainstem of the Canadian River from below 12E Road (40.720033, -106.088912) to the confluence with the North Platte River. All tributaries to the Canadian River, including wetlands, which enter the mainstem from the southwest from below 12E Road to the confluence with the North Platte River.
Listed portion:	COUCNP04b_A	Canadian River below 12E Road to confluence w/ North Platte River. Tributaries entering mainstem of Canadian River from SW side of mainstem.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCNP04b_B	Mainstem of the Illinois River, including all tributaries and wetlands, from a point immediately below the confluence with Indian Creek to the confluence with the Michigan River, except for specific listings in Segment 7a and 7b.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	H
COUCNP05a	5a. Mainstem of the Michigan River from the source to a point immediately below the confluence with the North Fork Michigan River.
Listed portion:	COUCNP05a_A	Mainstem of the Michigan River from the source to a point immediately below the confluence with the North Fork Michigan River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COUCNP05b	5b. Mainstem of the Michigan River from a point immediately below the confluence with the North Fork Michigan River to the confluence with the North Platte River.
Listed portion:	COUCNP05b_A	Mainstem of the Michigan River from a point immediately below the confluence with the North Fork Michigan River to the confluence with the North Platte River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
COUCNP07b	7b. Mainstem of Spring Creek from the outlet of Spring Creek (Number 31) Reservoir to the confluence with the Illinois River.
Listed portion:	COUCNP07b_A	Mainstem of Spring Creek from the outlet of Spring Creek (Number 31) Reservoir to the confluence with the Illinois River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	5. - 303(d) List	M
Aquatic Life Use	pH	5. - 303(d) List	M
COUCNP09	9. All lakes and reservoirs tributary to the North Platte and Encampment Rivers except for specific listings in Segment 8.
Listed portion:	COUCNP09_B	Big Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Listed portion:	COUCNP09_C	North Delaney Lake.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCNP09_D	Lake John.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	pH	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCRF02	2. Mainstem of the Roaring Fork River, including all tributaries and wetlands, from the source to a point immediately below the confluence with Hunter Creek, except for those tributaries included in Segment 1.
Listed portion:	COUCRF02_A	Mainstem of the Roaring Fork River, including all tributaries and wetlands, from the source to a point immediately below the confluence with Hunter Creek, except for those tributaries included in Segment 1.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
COUCRF03a	3a. Mainstem of the Roaring Fork River, from a point immediately below the confluence with Hunter Creek, to a point immediately below the confluence with the Fryingpan River. All tributaries to the Roaring Fork River, including wetlands, from a point immediately below the confluence with Hunter Creek to the confluence with the Colorado River, except for those tributaries included in Segment 1, 3b, 3d, 4-10b.
Listed portion:	COUCRF03a_B	Roaring Fork from confluence with Hunter Creek to the confluence of Trentaz Gulch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCRF03a_C	West Sopris Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCRF03a_D	Capitol Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCRF03a_E	Cattle Creek from Fisher Creek to Mouth.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCRF03a_F	Mainstem of the Roaring Fork River, from a point immediately below the confluence with Trentaz Gulch, to a point immediately below the confluence with the Fryingpan River. All tributaries to the Roaring Fork River, including wetlands, from a point immediately below the confluence with Hunter Creek to the confluence with the Colorado River, except for those tributaries included in Segment 1, 3b, 3d, 4-10b, West Sopris, Capital, Roaring Fork, Cattle Creek, and Three Mile Creek Portions.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCRF03a_G	Three Mile Creek, including all tributaries, from the source to the Roaring Fork River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
COUCRF03b	3b. Mainstem of Red Canyon, including all tributaries and wetlands, from the source to the confluence with the Roaring Fork River, except for Landis Creek from the source to the Hopkins Ditch (39.522138, -107.223479).
Listed portion:	COUCRF03b_B	Landis Creek from the Hopkins Ditch (39.522138, -107.223479) to its confluence with Red Canyon.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
COUCRF03c	3c. Mainstem of the Roaring Fork River from a point immediately below the confluence with the Fryingpan River to the confluence with the Colorado River.
Listed portion:	COUCRF03c_B	Roaring Fork below the confluence with the Crystal River to the mouth.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCRF03c_C	Roaring Fork River from the Fryingpan River to the Crystal River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COUCRF04	4. Mainstem of Brush Creek from the source to the confluence with the Roaring Fork River.
Listed portion:	COUCRF04_A	Mainstem of Brush Creek from the source to the confluence with the Roaring Fork River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COUCRF07	7. All tributaries to the Fryingpan River, including all wetlands, from the source to the confluence with the Roaring Fork River, except for those tributaries included in Segment 1.
Listed portion:	COUCRF07_B	South Fork Frying Pan River from transbasin diversion to confluence with unnamed tributary (39.251280N, -106.594420W).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COUCRF12	12. All lakes and reservoirs tributary to the Roaring Fork River, except for the specific listings in Segment 11.
Listed portion:	COUCRF12_C	Ruedi Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCUC01	1. Mainstem of the Colorado River, including all tributaries and wetlands, within or flowing into Rocky Mountain National Park.
Listed portion:	COUCUC01_A	Mainstem of the Colorado River, including all tributaries and wetlands, within or flowing into Rocky Mountain National Park.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	H
COUCUC02	2. Mainstem of the Colorado River, including all tributaries and wetlands, within or flowing into Arapahoe National Recreation Area, except for the specific listing in Segment 5.
Listed portion:	COUCUC02_C	Colorado River from Shadow Mountain Reservoir to Granby Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC02_D	Mainstem of North Inlet from Tonahutu Creek to Grand Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC02_E	Mainstem of East Inlet.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC02_F	Mainstem of the Colorado River, including all tributaries and wetlands within, or flowing into Arapahoe National Recreation Area. Except for Willow, Stillwater, Arapaho Creeks, East Inlet, North Inlet, Roaring Fork, and the Colorado River from Shadow Mountain Reservior to Granby Reservior.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC02_I	Arapaho Creek downstream of Monarch Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Silver (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC02_K	Willow Creek, including all tributaries and wetlands, from the National Forest boundary to a point immediately upstream of Willow Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Listed portion:	COUCUC02_L	Stillwater Creek, including its tributaries and wetlands, within or flowing into Arapaho Recreation Area.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COUCUC02_M	Roaring Fork Arapaho Creek from Indian Peaks Wilderness to Lake Granby.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
COUCUC03	3. Mainstem of the Colorado River from the outlet of Lake Granby to below the confluence with the Roaring Fork River.
Listed portion:	COUCUC03_A	Colorado River from outlet of Lake Granby to Windy Gap Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCUC03_B	Colorado River from Windy Gap Reservoir to 578 Road Bridge.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCUC03_C	Colorado River from 578 Road Bridge to Gore Canyon.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COUCUC03_D	Colorado River from Gore Canyon to Derby Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COUCUC03_E	Colorado River from Derby Creek to below the confluence with the Roaring Fork River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
COUCUC04	4. All tributaries to the Colorado River, including all wetlands, from the outlet of Lake Granby to above the confluence with the Roaring Fork River, which are on National Forest lands, except for the specific listings in Segments 2, 8, 9 and 10a.
Listed portion:	COUCUC04_B	Red Dirt Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provi	sional) 5. - 303(d) List	H
Listed portion:	COUCUC04_C	All tributaries to the Colorado River, including all wetlands, from the outlet of Lake Granby to above the confluence with the Roaring Fork River, which are on National Forest lands, except for the specific listings in Segments 2, 8, 9 and 10a and Red Dirt Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Cadmium (Total)	3b. - M&E List	N/A
COUCUC05	5. Mainstem of Willow Creek from the outlet of Willow Creek Reservoir to the confluence with the Colorado River.
Listed portion:	COUCUC05_B	Mainstem of Willow Creek from the outlet of Willow Creek Reservoir to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COUCUC06a	6a. All tributaries to the Colorado River, including all wetlands, from the border of Rocky Mountain National Park and Arapahoe National Recreation Area to a point immediately above the confluence with the Blue River and Muddy Creek, which are not on National Forest lands, except for the specific listings in Segments 5, 6b, 8 and 10a-c.
Listed portion:	COUCUC06a_B	All tributaries to the Colorado River, including all wetlands, from the border of Rocky Mountain National Park and Arapahoe National recreation Area to a point immediately above the confluence with the Blue River and Muddy Creek, which are not on the National Foreste lands, except for the specific listings in Segments 5, 6b and 10a-c.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Mercury (Total)	3b. - M&E List	N/A
COUCUC06b	6b. Mainstem of un-named tributary to Willow Creek from the headwaters to the confluence with Willow Creek (40.131422, -105.920895).
Listed portion:	COUCUC06b_A	Mainstem of un-named tributary from the headwaters to Willow Creek Reservoir Road.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Nitrite	5. - 303(d) List	M
Listed portion:	COUCUC06b_B	Mainstem of un-named tributary to Willow Creek from the Willow Creek Reservoir Road to the confluence with Willow Creek (40.131422, -105.920895).
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Ammonia	4a. - TMDL	N/A
COUCUC07a	7a. All tributaries to the Colorado River, including all wetlands, from a point immediately above the confluence with the Blue River and Muddy Creek to a point immediately below the confluence with the Roaring Fork River, which are not on National Forest lands, except for specific listings in Segment 7b, 7c, 7d, 7e and in the Blue River, Eagle River, and Roaring Fork River basins.
Listed portion:	COUCUC07a_C	Mainstem of Muddy Creek.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COUCUC07b	7b. All tributaries to Muddy Creek, including all wetlands, from the inlet of Wolford Mountain Reservoir to the confluence with the Colorado River. Mainstems of Rock Creek, Deep Creek, Sheephorn Creek, Sweetwater Creek, Piney River and Blacktail Creek, including all tributaries and wetlands, from their sources to their confluences with the Colorado River, which are not on National Forest lands.
Listed portion:	COUCUC07b_A	Mainstems of Rock Creek, Deep Creek, Sheephorn Creek, Sweetwater Creek and Piney River, including all tributaries and wetlands, from their sources to their confluences with the Colorado River, which are not on National Forest Lands.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCUC07b_D	All tributaries to Muddy Creek, including all wetlands, from the inlet of Wolford Mountain Reservoir to the confluence with the Colorado River, except Alkali Slough and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Sulfate	3b. - M&E List	N/A
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Listed portion:	COUCUC07b_E	Alkali Slough and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Manganese (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
Water Supply Use	Sulfate	5. - 303(d) List	L
COUCUC07c	7c. Mainstem of Muddy Creek from the source to a point immediately below the confluence with Eastern Gulch, except those waters on National Forest lands. All tributaries to Muddy Creek, including all wetlands, from the source to the inlet of Wolford Mountain Reservoir, except those waters on National Forest lands. The mainstems of Derby Creek, Cabin Creek, and Red Dirt Creeks (all tributary to the Colorado River), including all tributaries and wetlands, from their sources to their confluences with the Colorado River, except those waters on National Forest lands.
Listed portion:	COUCUC07c_B	Diamond Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	H
COUCUC07d	7d. Mainstem of Muddy Creek from the outlet of Wolford Mountain Reservoir to above the Highway 40 Bridge in Kremmling (40.060574, -106.398739).
Listed portion:	COUCUC07d_A	Mainstem of Muddy Creek from the outlet of Wolford Mountain Reservoir to Cow Gulch.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCUC07d_B	Mainstem of Muddy Creek from Cow Gulch to the Highway 40 Bridge in Kremmling (40.060574, -106.398739).
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Water Supply Use	Manganese (Dissolved)	5. - 303(d) List	L
COUCUC07e	7e. Mainstem of Muddy Creek from above the Highway 40 Bridge in Kremmling (40.060574, -106.398739) to the confluence with the Colorado River.
Listed portion:	COUCUC07e_A	Mainstem of Muddy Creek from above the Highway 40 Bridge in Kremmling (40.060574, -106.398739) to the confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COUCUC08	8. Mainstem of the Williams Fork River, including all tributaries and wetlands, from the source to the confluence with the Colorado River, except for those tributaries in Segment 9.
Listed portion:	COUCUC08_B	Mainstem of Williams Fork River below Kinney Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	H
Listed portion:	COUCUC08_C	Ute Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COUCUC10a	10a. Mainstem of the Fraser River from the source to a point immediately below the Rendezvous Bridge (39.933728, -105.789785). All tributaries to the Fraser River, including wetlands, from the source to the confluence with the Colorado River, except for those tributaries included in Segments 2 and 9.
Listed portion:	COUCUC10a_B	Ranch Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Aquatic Life Use	Temperature	5. - 303(d) List	L
Listed portion:	COUCUC10a_D	Vasquez Creek and its tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Macroinvertebrates (Provisional)	5. - 303(d) List	L
Listed portion:	COUCUC10a_G	Saint Louis Creek below King Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
COUCUC10c	10c. Mainstem of the Fraser River from a point immediately below the Hammond No 1 Ditch (39.952113, -105.814481) to the confluence with the Colorado River.
Listed portion:	COUCUC10c_A	Fraser River from below the Hammond No 1 Ditch in Town of Fraser (39.952113, -105.814481) to Fraser Canyon near Tabernash.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC10c_B	Fraser River from Fraser Canyon near Tabernash to the Town of Granby.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCUC10c_C	From the Town of Granby to confluence with the Colorado River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCUC12	12. Lakes and reservoirs within Arapahoe National Recreation Area, including Grand Lake, Shadow Mountain Lake and Lake Granby.
Listed portion:	COUCUC12_B	Shadow Mountain Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCUC12_C	Lake Granby.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Listed portion:	COUCUC12_D	Willow Creek Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCUC12_E	Grand Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCUC13	13. All lakes and reservoirs tributary to the Colorado River from the boundary of Rocky Mountain National Park and Arapahoe National Recreation Area to a point immediately above the confluence with the Roaring Fork River, except for specific listings in Upper Colorado Segments 11 and 12 and the Blue River and Eagle River subbasins.
Listed portion:	COUCUC13_C	Wolford Mountain Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCUC13_D	Williams Fork Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCUC13_E	Windy Gap Reservior.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCYA02a	2a. Mainstem of the Yampa River from the confluence of the Bear River and Phillips Creek to a point immediately above the confluence with Oak Creek.
Listed portion:	COUCYA02a_A	Mainstem of the Yampa River from the confluence of the Bear River and Phillips Creek to Stagecoach Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
Listed portion:	COUCYA02a_B	Mainstem of the Yampa River from Stagecoach Reservoir to above confluence with Oak Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCYA02b	2b. Mainstem of the Yampa River from a point immediately above the confluence with Oak Creek to a point immediately below the confluence with Elkhead Creek.
Listed portion:	COUCYA02b_A	Mainstem of the Yampa River from a point immediately above the confluence with Oak Creek to a point immediately below the confluence with Elkhead Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	5. - 303(d) List	H
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCYA03	3. All tributaries to the Yampa River, including all wetlands, from the source to above the confluence with the Elk River, except for specific listings in Segments 1 and 4-7. Mainstem of the Bear River, including all tributaries and wetlands, from the boundary of the Flat Tops Wilderness Area to the confluence with the Yampa River.
Listed portion:	COUCYA03_A	Tributaries to Yampa River except, except for specific listings in Segments 4-8, 13a-f and 19. Mainstem of the Bear River, including all tributaries and wetlands from the boundary of the Flat Tops Wilderness Area to the confluence with the Yampa River. Also excludes Bushy Creek, Mainstem of Walton Creek, Little Morrison Creek, and Gunn Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Listed portion:	COUCYA03_B	Bushy Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	L
Listed portion:	COUCYA03_D	Little Morrison Creek.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCYA03_E	Gunn Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	5. - 303(d) List	L
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCYA04	4. Mainstem of Little White Snake Creek from the source to the confluence with the Yampa River.
Listed portion:	COUCYA04_A	Mainstem of Little White Snake Creek from the source to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	M
COUCYA08	8. Mainstem of the Elk River, including all tributaries and wetlands, from the source to the confluence with the Yampa River, except for those tributaries included in Segments 1 and 20a. Mainstem of the West Fork Elk River from the source to the confluence with the Yampa River.
Listed portion:	COUCYA08_B	Mainstem of the Elk River, including all tributaries and wetlands, below Morin Ditch to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Recreational Use	E. coli	5. - 303(d) List	H
Listed portion:	COUCYA08_C	Lost Dog Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Zinc (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
COUCYA13b	13b. Mainstem of Foidel Creek, including all tributaries and wetlands, from the source to the confluence with Middle Creek. Mainstem of Fish Creek, including all tributaries and wetlands, from County Road 27 (40.355559, -107.105131) to the confluence with Trout Creek, except for specific listings in Segment 13g. Mainstem of Middle Creek, including all tributaries and wetlands, from County Road 27 (40.339183, -107.025533) to the confluence with Trout Creek.
Listed portion:	COUCYA13b_C	Foidel Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	H
Aquatic Life Use	Macroinvertebrates	5. - 303(d) List	H
Listed portion:	COUCYA13b_D	Middle Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Sediment	5. - 303(d) List	H
COUCYA13c	13c. Mainstem of Trout Creek, including all tributaries and wetlands, from the headgate of Spruce Hill Ditch (40.317190, -107.005110) to the confluence with Fish Creek, except for specific listings in Segment 13b.
Listed portion:	COUCYA13c_B	Mainstem of Trout Creek, including all tributaries and wetlands, from the headgate of Spruce Hill Ditch (40.317190, -107.005110) to the confluence with Fish Creek, except for specific listings in Segment 13b.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Dissolved Oxygen	3b. - M&E List	N/A
COUCYA13d	13d. Mainstem of Dry Creek, including all tributaries and wetlands, from the source to above the confluence with Temple Gulch.
Listed portion:	COUCYA13d_C	Dry Creek from Seneca sample location 5 (WSD5) to above Temple Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
Listed portion:	COUCYA13d_D	Mainstem of Dry Creek, including all tributaries and wetlands, from source to above the confluence with Temple Gulch, except for the mainstem of Dry Creek from Seneca sample location 5 (WSD5) to above Temple Gulch.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	L
COUCYA13e	13e. Mainstem of Sage Creek, including all tributaries and wetlands, from the source to the confluence with the Yampa River.
Listed portion:	COUCYA13e_A	Mainstem of Sage Creek, including all tributaries and wetlands,from the source to above Routt County Road 51D, Grassy Creek and tributaries.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Temperature	3b. - M&E List	N/A
Aquatic Life Use	Macroinvertebrates	3b. - M&E List	N/A
Listed portion:	COUCYA13e_B	Sage Creek and tributaries below Routt County Road 51D to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	L
COUCYA13g	13g. All tributaries to Fish Creek from the confluence with Cow Camp Creek (40.398773, -107.016467) to the confluence with Trout Creek.
Listed portion:	COUCYA13g_C	Unnamed Tributary (40.419, -107.00) above Fish Creek.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	5. - 303(d) List	H
COUCYA13h	13h. Mainstem of Dry Creek (near Hayden), including all tributaries and wetlands, from above the confluence with Temple Gulch to the confluence with the Yampa River.
Listed portion:	COUCYA13h_A	Mainstem of Dry Creek, (near Hayden), including all tributaries and wetlands, from Routt County Road 53 to the confluence with the Yampa River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
Listed portion:	COUCYA13h_B	Dry Creek, including Temple Gulch and all tributaries, from the mainstem of Dry Creek just above the confluence with Temple Gulch to Routt County Road 53.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	5. - 303(d) List	M
COUCYA13j	13j. Mainstem of Grassy Creek (near Hayden), including all tributaries and wetlands, from above the confluence with Scotchmans Gulch to the confluence with the Yampa River.
Listed portion:	COUCYA13j_C	Scotchmans Gulch and its tributaries above Grassy Creek
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Selenium (Dissolved)	3b. - M&E List	N/A
COUCYA15	15. Mainstem of Elkhead Creek, including all tributaries and wetlands, from a point immediately below the confluence with Calf Creek to the confluence with the Yampa River. Dry Fork Elkhead Creek, including all tributaries and wetlands, from a point immediately below 80A Road (40.612676, -107.228533) to the confluence with Elkhead Creek.
Listed portion:	COUCYA15_B	Mainstem of Elkhead Creek from Calf Creek to Yampa River.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
COUCYA18	18. South Fork Little Snake River and Middle Fork Little Snake River, including all tributaries and wetlands, from their sources to the confluence with the Little Snake River, which are not on National Forest lands. North Fork Little Snake River, including all tributaries and wetlands, from the Colorado/Wyoming border to the confluence with the Little Snake River.
Listed portion:	COUCYA18_A	Little Snake River including all tributaries and wetlands from forest boundary to Wyoming border, except for the South Fork of the Little Snake River.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Copper (Dissolved)	3b. - M&E List	N/A
Listed portion:	COUCYA18_B	South Fork of Little Snake River and its tributaries.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Iron (Dissolved)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	L
COUCYA22	22. All lakes and reservoirs tributary to the Yampa River from the source to the confluence with Elkhead Creek, except for those listed in Segment 21. All lakes and reservoirs tributary to Elkhead Creek from the source to the confluence with the Yampa River, except for specific listings in Segment 23. All lakes and reservoirs tributary to the Little Snake River, including those on National Forest lands.
Listed portion:	COUCYA22_B	Catamount Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
Listed portion:	COUCYA22_D	Pearl Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Mercury (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Listed portion:	COUCYA22_E	Steamboat Lake.
Affected Use	Analyte	Category / List	Priority
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Water Supply Use	Iron (Dissolved)	5. - 303(d) List	L
Listed portion:	COUCYA22_F	Stagecoach Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	5. - 303(d) List	H
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H
COUCYA23	23. Elkhead Reservoir
Listed portion:	COUCYA23_A	Elkhead Reservoir.
Affected Use	Analyte	Category / List	Priority
Water Supply Use	Arsenic (Total)	3b. - M&E List	N/A
Aquatic Life Use	Iron (Total)	3b. - M&E List	N/A
Aquatic Life Use	Fish (Mercury)	5. - 303(d) List	H

5 CCR 1002-93.3

39 CR 03, February 10, 2016, effective 3/1/2016

39 CR 21, November 10, 2016, effective 11/30/2016

41 CR 03, February 10, 2018, effective 3/2/2018

43 CR 03, February 10, 2020, effective 3/1/2020

43 CR 10, May 25, 2020, effective 6/14/2020

44 CR 14, July 25, 2021, effective 8/14/2021

46 CR 16, August 25, 2023, effective 9/14/2023