Section 135 - Supplemental Standards for Butte BasinThe standards apply to Butte Basin, as delineated on Figure 8.12 and partitioned into designated Areas B, C, D, E, and Reclamation District 1004. The basin's west boundary is the Sacramento River east bank project levee, and above the Ord Ferry area where there is no project levee, the boundary is the designated floodway of the Sacramento River adopted November 29, 1988. The east boundary is based on the wetted area of the 1970 flood. The north boundary is the Sacramento River designated floodway in the proximity of Murphy Slough and Golden State Island, and the south boundary is the Sacramento River between the city of Colusa and the Butte Slough outfall gates, a section of the Butte Slough levee in both Colusa and Sutter Counties, and Pass Road in Sutter County. These standards supplement and, where in conflict with, supersede the standards in section 111 through section 137.
(a) Approval from the board is required for any encroachment that could reduce or impede floodflows, or would reclaim any of the floodplain within Butte Basin.(1) Encroachments in Reclamation District 1004 are not regulated by the board.(2) The supplemental standards do not apply to that portion of Area E located north of the Butte-Sutter County line and its extension westward into Colusa County, and situated adjacent to the Sacramento River project levee where the natural ground level is higher than the 100-year flood elevation.(3) Except where the activity would potentially affect a project levee or other project feature, the standards within sections 116, 122, 123, 124, 126, 127, 129, 130, 131, 132, and 137 do not apply to that portion of Area E located south of the Butte-Sutter County line and its extension westward into Colusa County.(b) Approval from the board is not required for crop checks less than thirty-six (36) inches in height. In Areas B, C and D, all crop checks must be removed prior to flood season, unless they comply with the requirements of subdivisions (d), (e), and (f), respectively.(c) Except where the activity would potentially affect a project levee or other project feature, approval from the board is not required for land leveling or grading, or for drainage and irrigation improvements in Areas C, D, and E that have a localized impact only and comply with subdivisions (e), (f), and (g) of this section.(d) Within Area B, approval from the board is not required for any encroachment that is less than eighteen (18) inches in height above the natural ground level. However, any proposed encroachment within a slough or swale must be approved by the board. Area B extends southerly from Butte Basin's northerly boundary to a line located one thousand (1,000) feet southeasterly and lying parallel to the Parrott Grant line.(e) Within Area C, approval from the board is not required for any encroachment less than thirty-six (36) inches in height above the natural ground level, and having a crest elevation less than seventy and one tenth (70.1) feet (NGVD). Area C is the area enclosed within a three- (3) mile radius measured from the center of Moulton Weir and limited by the southeasterly extensions of the north and south training levee alignments to the three- (3) mile arc.(f) Within Area D, approval from the board is not required for any encroachment less than thirty-six (36) inches in height above the natural ground level and having a crest elevation less than fifty-four and nine tenths (54.9) feet (NGVD). Area D encompasses the Colusa Weir together with its outflow channel enclosed by training levees, and an overflow area extending to Butte Creek.(g) Within Area E, approval from the board is not required for any encroachment less than thirty-six (36) inches in height above the natural ground level. The northern boundary of Area E is a line located one thousand (1,000) feet southeasterly of the south Parrott Grant line, and the southern boundary is formed by the Sacramento River between the city of Colusa and the Butte Slough outfall gates, a section of the Butte Slough levee in both Colusa and Sutter Counties, and Pass Road in Sutter County.(h) Within that portion of Area E located south of Gridley Road, new and existing recreational structures, including caretaker, security, and dwellings for seasonal occupancy (as defined in section 113) may be permitted provided the finished floor level of the structure is at least two (2) feet above the design flood plane or two (2) feet above the 100-year flood elevation, whichever is higher.Cal. Code Regs. Tit. 23, § 135
1. New section and figure 8.12 filed 9-30-96; operative 10-30-96 (Register 96, No. 40). Note: Authority cited: Section 8571, Water Code. Reference: Sections 8608, 8609 and 8710, Water Code.
1. New section and figure 8.12 filed 9-30-96; operative 10-30-96 (Register 96, No. 40).