Contra Costa County designates the project area as watershed lands, with General Agriculture District and Exclusive Agriculture Distract Zones.
The purpose of the San Pablo Dam Seismic Upgrade Project is to improve the embankment and foundation soils downstream of the Pablo Dam to withstand shaking generated by the maximum credible earthquake on the Hayward-Roger Creek fault without significant strength loss, to limit permanent deformation or settlement at the dam crest to acceptable levels, and to prevent damage to the outlet works, thereby ensuring that the risk of flooding to downstream communities after a seismic event is significantly minimized. The proposed project involves using large, multiple auger equipment to inject and mix cement grout into portions of the dam foundation material, and the construction of a larger buttress fill on the downstream face of the dam.
Aesthetics, Air Quality, Biological Resources, Cultural Resources, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Recreation, Transportation, Vegetation, Wetland/Riparian, Wildlife
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Highway Patrol, California Native American Heritage Commission (NAHC), Department of Toxic Substances Control, Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Divison of Financial Assistance, California Department of Transportation, District 4 (DOT), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB)
Reviewing Agency Comments
California Department of Transportation, District 4 (DOT), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB)
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