Dos Osos Reservoir Replacement Project

3 Documents in Project


SCH Number
Lead Agency
East Bay Municipal Utility District
Document Title
Dos Osos Reservoir Replacement Project
Document Type
MND - Mitigated Negative Declaration

Document Description
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.

Contact Information
Chien Wang
East Bay Municipal Utility District
375 Eleventh Street
Oakland, CA 94623-1055



Contra Costa
Cross Streets
Los Norrabos, El Toyonal
Total Acres
State Highways
San Pablo Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (dual reservoirs Type, 0.24 MGD)
Local Action
Other Action Other Action: approval of new water reservoirs
Project Issues
Cumulative Effects Water Quality Vegetation Traffic/Circulation Toxic/Hazardous Noise Geologic/Seismic Biological Resources Archaeologic-Historic Air Quality Aesthetic/Visual
Reviewing Agencies
Air Resources Board, Transportation Projects California Highway Patrol California Public Utilities Commission Caltrans, District 4 Department of Fish and Wildlife, Region 3 Native American Heritage Commission Regional Water Quality Control Board, Region 2 Resources Agency State Water Resources Control Board, Division of Water Rights State Water Resources Control Board, Divison of Financial Assistance
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