Tiger Creek Regulator Dam Spillway Replacement Project

Tiger Creek Regulator Dam Spillway Replacement Project

The Proposed Project is located in Amador County approximately 24 miles northeast of Jackson. Construction will take place at the Tiger Creek Regulator Dam and Reservoir on Tiger Creek. The Proposed Project includes a new spillway along the Dam’s right abutment and abandoning-in-place the old spillway infrastructure along the Dam’s left abutment. The purpose of the Proposed Project is to update the Dam to safely pass a flood event of up to 6,000 cubic feet per second. New spillway construction includes: a new spillway intake (crest structure), new notch through the existing dam, new concrete chute, new flip bucket splitter blocks, and new plunge pool. Other associated features of the Proposed Project include a permanent access road to the new spillway, a temporary construction access road with four temporary bridges across Tiger Creek, a temporary 240-foot-long cofferdam in the Reservoir to facilitate new spillway construction, a new 450-foot single span log boom and anchor blocks, new lighting on the Dam, and three staging areas. The IS/MND is being recirculated because on May 9, 2024, PG&E revised the Proposed Project description to move the concrete batch plant from the Cedar Mill staging area to the Spur 1 staging area.

Jackson

Amador

Countywide, Northern California

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Pesticide Regulation (DPR), California Department of Resources Recycling and Recovery, California Department of State Parks, Division of Boating and Waterways, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 10 (DOT), California Department of Water Resources (DWR), California Energy Commission, California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), California San Joaquin River Conservancy (SJRC), California State Lands Commission (SLC), Central Valley Flood Protection Board, Delta Protection Commission, Delta Stewardship Council, Office of Historic Preservation, San Francisco Bay Conservation and Development Commission (BCDC), Sierra Nevada Conservancy, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance, University of California Natural Reserve System (UCNRS)

Power:Hydroelectric (Megawatts 206)

CWA 401 certification

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Economics/Jobs, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire