Dos Osos Reservoir Replacement Project

3 Documents in Project


SCH Number
Lead Agency
East Bay Municipal Utility District (EBMUD)
Document Title
Dos Osos Reservoir Replacement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
primarily residential and watershed

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
Lead/Public Agency
375 Eleventh Street
Oakland, CA 94623-1055

Phone : (510) 287-1086


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 (Type dual reservoirs, MGD 0.24)
Local Action
approval of new water reservoirs
Project Issues
Aesthetics Air Quality Biological Resources Cultural Resources Cumulative Effects Geology/Soils Hazards & Hazardous Materials Hydrology/Water Quality Noise Transportation Vegetation
Reviewing Agencies
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

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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