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
FIN - Final Document
Present Land Use
primarily residential and watershed
Document Description
Note: Final MND found at 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
Agency Name
East Bay Municipal Utility District
Contact Types
Lead/Public Agency


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

Notice of Completion

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

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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