Wash. Admin. Code § 173-548-020

Current through Register Vol. 24-20, October 15, 2024

Section 173-548-020 - Establishment of base flows

(1) Base flows are established for stream management units with monitoring to take place at certain control points as follows:

STREAM MANAGEMENT UNIT INFORMATION

Stream Management Unit Name, Control Station Name and Number

Control Station Location by River Mile, Section, Township, Range

Affected Stream Reach (includes tributaries)

Lower Methow

Methow R. nr.

Pateros

(12.4499.50)

6.7

20-30-23E

Methow River confluence with Wells Pool to confluence with Twisp River.

Middle Methow

Methow R. nr.

Twisp

(12.4495.00)

40.0

17-33-22E

Methow River from confluence with

Twisp River to confluence with Chewack River.

Upper Methow

Methow R. nr.

Winthrop

(12.4473.89)

50.2

2-34-21E

Methow River from confluence with Chewack River to confluence with Little Boulder Creek and including Little Boulder Creek.

Methow Headwaters Methow R. at

Little Boulder Cr.

(12.4473.83)

65.3

25-36-19E

Methow River from confluence with Little Boulder Creek to headwaters.

Early Winters Creek

Early Winters Cr.

near Mazama

27-36-19E

Early Winters Creek from confluence with Methow River to headwaters.

Chewack River

Chewack R. nr.

Boulder Creek

(12.4475.00)

8.7

35-36-21E

Chewack River confluence with Methow River to headwaters.

Twisp River

Twisp R. nr.

Twisp

(12.4489.98)

0.3

7-33-22E

Twisp River from confluence with Methow River to headwaters.

(2) Base flows established for the stream management units in WAC 173-548-020(1) are as follows:

Base Flows in the Methow River

(All Figures in Cubic Feet Per Second)

[CODIFICATION NOTE: The graphic presentation of this table has been varied slightly in order that it would fall within the printing specification for the Washington Administrative Code. The following table was too wide to be accommodated in the width of the WAC column. The table as codified has been divided into two tables with Part 1 covering the Lower Methow, Middle Methow and Upper Methow and with Part 2 covering the Methow Headwaters, Early Winters Creek, Chewack River and Twisp River.]

PART 1

Month	Day	Lower Methow (12.4499.50)	Middle Methow (12.4495.00)	Upper Methow (12.4473.89)
Jan.	1	350	260	120
	15	350	260	120
Feb.	1	350	260	120
	15	350	260	120
Mar.	1	350	260	120
	15	350	260	120
Apr.	1	590	430	199
	15	860	650	300
May	1	1,300	1,000	480
	15	1,940	1,500	690
Jun.	1	2,220	1,500	790
	15	2,220	1,500	790
Jul.	1	2,150	1,500	694
	15	800	500	240
Aug.	1	480	325	153
	15	300	220	100
Sep.	1	300	220	100
	15	300	220	100
Oct.	1	360	260	122
	15	425	320	150
Nov.	1	425	320	150
	15	425	320	150
Dec.	1	390	290	135
	15	350	260	120

PART 2

Month	Day	Methow Headwaters (12.4473.83)	Early Winters Creek	Chewack River (12.4475.00)	Twisp River (12.4489.98)
Jan.	1	42	10	56	34
	15	42	10	56	34
Feb.	1	42	10	56	34
	15	42	10	56	34
Mar.	1	42	10	56	34
	15	42	10	56	34
Apr.	1	64	14	90	60
	15	90	23	140	100
May	1	130	32	215	170
	15	430	108	290	300
Jun.	1	1,160	290	320	440
	15	1,160	290	320	440
Jul.	1	500	125	292	390
	15	180	45	110	130
Aug.	1	75	20	70	58
	15	32	8	47	27
Sep.	1	32	8	47	27
	15	32	8	47	27
Oct.	1	45	11	56	35
	15	60	15	68	45
Nov.	1	60	15	68	45
	15	60	15	68	45
Dec.	1	51	12	62	39
	15	42	10	56	34

(3) Base flow hydrographs, as represented in Figure 1 in the document entitled "water resources management program, Methow River basin" dated 1976, shall be used for definition of base flows on those days not specifically identified in WAC 173-548-020(2) and 173-548-030.

(4) All rights hereafter established shall be subject to the base flows established in WAC 173-548-020(1) through (3), except as provided under WAC 173-548-030 herein.

(5) Future appropriations of water which would conflict with base flows shall be authorized, by the director, only in those situations when it is clear that overriding considerations of the public interest will be served.

Wash. Admin. Code § 173-548-020

Order DE 76-37, § 173-548-020, filed 12/28/76.