Sunset Reservoir

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Sunset Reservoir
Location San Francisco, California
Coordinates 37°44′59″N 122°29′00″W / 37.7496°N 122.4833°W / 37.7496; -122.4833Coordinates: 37°44′59″N 122°29′00″W / 37.7496°N 122.4833°W / 37.7496; -122.4833
Type Reservoir
Primary inflows Municipal Water System
Primary outflows Municipal Water System
Basin countries United States
Max. length 330 m (1,080 ft)
Max. width 155 m (509 ft)
Surface area 11 acres (4.5 ha)
Max. depth 10 m (33 ft)
Water volume 270 acre·ft (330,000 m3)
Surface elevation 116 m (381 ft)
References U.S. Geological Survey Geographic Names Information System: Sunset Reservoir

Sunset Reservoir is one of three terminal reservoirs in the Regional Water System in San Francisco, California. The reservoir is the city's largest reservoir and is located in the Sunset District at 24th Avenue and Ortega Street, is owned and maintained by the San Francisco Public Utilities Commission. Completed in 1960, the subterranean reservoir was constructed as an 11-acre (4.5 ha), 1,000 by 500 feet (300 m × 150 m), concrete basin, now containing 720 floor-to-ceiling columns. With its maximum depth of 33 ft (10 m), the reservoir's capacity is 270 acre·ft (330,000 m3) with average daily flows of 46 acre feet (57,000 m3) through 42-inch (1.1 m) inlet/outlet pipes.[1]

Seismic upgrades[edit]

  • Seismic rehabilitation, which would include stabilization of the soil dam embankment (completed); a retrofit of the walls and roof using seismic joints, shear walls, diagonal bracing, and struts; and foundation improvements.
  • General rehabilitation, which would include repairing deteriorated concrete, replacing part of the reservoir lining material, replacing inlet piping, installing security fencing, upgrading the landscaping, and other miscellaneous site improvements.[2]

Solar Project[edit]

The Sunset Reservoir Solar Project has installed 25,000 solar panels on the 480,000 sq ft (45,000 m2) roof of the reservoir. The 5-megawatt plant has more than tripled the city's current 2-megawatt solar generation capacity.[3] It opened in December 2010 in a ceremony introduced by Mayor Gavin Newsom.[4]

See also[edit]


  1. ^ H. Kenneth Hudnell (April 2009). "Mixing, De-Stratification, And Break-Point Chlorination In San Francisco’s Sunset Reservoir" (.PDF). SolarBee, Inc. p. 2. Retrieved 2009-10-13. 
  2. ^ Public utilities Commission (2009). "Sunset Reservoir Upgrades - North Basin". City and County of San Francisco. Retrieved 2009-09-29. 
  3. ^ "Mayor Newsom Praises SFPUC For Approving New Five Megawatt Solar Project at Sunset Reservoir" (Press release). SFPUC Communications and Public Outreach. 12 December 2008. Retrieved 2009-09-29. 
  4. ^ KGO ABC7 News, December 2010

External links[edit]