San Antonio Reservoir Hypolimnetic Oxygenation System

2 Documents in Project


SCH Number
Lead Agency
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
Agency Name
San Francisco Planning Dept.
Contact Types
Lead/Public Agency


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 Types
Water Facilities (Type oxygen system)
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Transportation, wind and shadow
Reviewing Agencies
California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, 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, Department of Water Resources
Reviewing Agency Comments
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.

Download CSV New Search Print