Water Quality Certification Amendment for the New Slab Creek Powerhouse and Boating Flow Release Valve Project (Project), Upper American River Hydroelectric Pro

6 Documents in Project

Summary

SCH Number
2015072021
Lead Agency
Sacramento Municipal Utility District
Document Title
Water Quality Certification Amendment for the New Slab Creek Powerhouse and Boating Flow Release Valve Project (Project), Upper American River Hydroelectric Pro
Document Type
NOD - Notice of Determination
Received

Document Description
Project is located immediately below Slab Creek Dam on the South Fork American River, approx. 50 miles east of Sacramento, and three miles north of the town of Camino. Sacramento Municipal Utility District proposes to use fiber sacks filled with washed sand and gravel to construct a temporary cofferdam, in lieu of rubber water-filled bladders referenced in Condition 12 of the existing Project water quality certification. The use of fiber sacks will help ensure the cofferdam is stable and tall enough to withstand high flows. Additionally, the cofferdam would be left in place within the South Fork American River for the duration of the major excavation and construction, approx. 15 months. Retention of the cofferdam throughout the winter will help avoid the inundation of newly excavated foundation areas and the transport of disturbed soils into the South Fork American River. Runoff within the confines of the cofferdam would be captured and pumped to a settling tank to remove suspended solids prior to release back to the South Fork American River. SMUD asserts the proposed changes will protect water quality objectives more effectively than the original language of Condition 12.

Contact Information
Kristen Gangl
SWRCB
1001 I Street, 14th Floor
Sacramento, CA 95814

916-323-9389

Location

Coordinates
38°46'16.43"N 120°42'13.84"W
Counties
El Dorado
Zip
95709
Total Acres
24.42
State Highways
Hwy 50

Notice of Determination

Approving Agency
SWRCB
Approving Agency Role
Responsible Agency
Approved On
Final EIR Available Location
1001 I Street, 14th Floor, Sacramento, CA 95814

Determinations

(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(3) Mitigated measures were made a condition of the approval of the project
No
(4) A Statement of Overriding Considerations was adopted for this project
No
(5) Findings were made pursuant to the provisions of CEQA
No
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