Dos Osos Reservoir Replacement Project

Dos Osos Reservoir Replacement Project

EBMUD's existing 0.24-million-gallon Dos Osos Reservoir will be replaced with new dual 0.12 MG, steel-bolted reservoirs on EBMUD owned watershed property approx 70 ft higher in elevation, 300 ft southwest of the existing Dos Osos Reservoir site in the city of Orinda. A new, 12-in, inlet-outlet pipeline will be constructed to connect the existing water distribution system to the new dual reservoirs and will be located in an approx 800-ft long access road that will be constructed for permanent access from Los Norrabos to the new dual reservoirs. EBMUD's existing Dos Osos Pumping Plant, located at 263 El Toyonal, Orinda, is a 0.3-million gallons per day pumping plant that will be rehabilitated at the same capacity; however, the Dos Osos Pumping Plant will be upgraded with pump units that can pump to a higher total dynamic head to serve dual Osos Reservoirs. Upon construction completion and successful testing of the new facilities, the existing Dos Osos Reservoir will be demolished.

Orinda

Contra Costa

Air Resources Board, Transportation Projects, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Transportation, District 4 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Resources Agency, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Water Facilities (Type dual reservoirs, MGD 0.24)

approval of new water reservoirs

Aesthetics, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise, Transportation, Vegetation