San Antonio Reservoir Hypolimnetic Oxygenation System

2 Documents in Project


SCH Number
Lead Agency
San Francisco, City and County of (City and County of San Francisco)
Document Title
San Antonio Reservoir Hypolimnetic Oxygenation System
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Reservoir land Z: Agricultural

Document Description
The proposed project would involve construction of a new Hypolimnetic Oxygenation System for the San Antonio Reservoir, which is under the jurisdiction of the San Francisco Public Utilities Commission. The new oxygenation system would be installed at the northern terminus of the James Turner Dam, south of the existing San Antonio Reservoir Keeper's residence. The hypolimnetic (deeper/deepest) layers oxygenation system would be built and installed to improve water quality in the reservoir which become oxygen deficient during warmer times of the year. The addition of oxygen gas into the reservoir during these times would help reduece algae growth, which growth leads to taste and odor problems. complete hypolimnetic oxygenation system project would include construction and installation of a fenced-in 1,160 sf concrete slab area upon which the oxygen tanks and associated equipment would be installed; construction of a 140 ft long paved extension of an existing access road for trucks to deliver oxygen tanks to the system; installation and tenching (in some areas) of 2 oxygen supply pipelines into the reservoir and a 500 ft long underground electric line to the Reservoir Keeper's residence. The ne oxygenation system would occupy less than 1.8 acres of land and reservoir surface area. The 2 oxygen supply pipelines would extend to elevations between 320 ft and 365 ft in the reservoir water.

Contact Information
Irene Nishimura
San Francisco Planning Dept.
Major Enviro. Analysis Division 1650 Mission St., Suite 400
San Francisco, CA 94103

Phone : (415) 575-9041


37°34'34.58"N 121°50'49.17"W
Cross Streets
La Costa Rd and Indian Creek Rd
Total Acres
Parcel #
State Highways
Niles Canyon Heritage
Sunol Glen ES
San Antonio Creek
Other Location Info
City/Nearest Community: Sunol

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (oxygen system Type)
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Toxic/Hazardous Traffic/Circulation Water Quality Land Use Cumulative Effects Other Other Issues: wind and shadow
Reviewing Agencies
California Department of Boating and Waterways California Department of Conservation California Department of Fish and Wildlife, Bay Delta Region 3 California Department of Parks and Recreation California Department of Transportation, District 4 California Highway Patrol California Native American Heritage Commission California Public Utilities Commission California Regional Water Quality Control Board, San Francisco Bay Region 2 Resources Agency Department of Water Resources

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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