Sunset Reservoir Explained

Sunset Reservoir
Location:	San Francisco, California
Coords:	37.7496°N -122.4833°W
Type:	Reservoir
Inflow:	Municipal Water System
Pushpin Map:	United States San Francisco Bay Area
Outflow:	Municipal Water System
Basin Countries:	United States
Length:	330m (1,080feet)
Width:	155m (509feet)
Area:	11acres
Max-Depth:	10m (30feet)
Volume:	270acre.ft
Elevation:	116m (381feet)

Sunset Reservoir is one of three terminal reservoirs in the Regional Water System in San Francisco, California. The reservoir, the city's largest, is located in the Sunset District at 24th Avenue and Ortega Street, and is owned and maintained by the San Francisco Public Utilities Commission. Completed in 1960, the subterranean reservoir was constructed as an 11acres, 1000x, concrete basin, now containing 720 floor-to-ceiling columns. With its maximum depth of 33feet, the reservoir's capacity is 270acre.ft with average daily flows of 46acre.ft through 42inches inlet/outlet pipes.^[1]

Seismic upgrades

• 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

The Sunset Reservoir Solar Project has installed 25,000 solar panels on the 480000ft2 roof of the reservoir. The 5-megawatt plant more than tripled the city's 2-megawatt solar generation capacity.^[3] It opened in December 2010 in a ceremony introduced by Mayor Gavin Newsom.^[4]

Generation (MW·h) of Sunset Reservoir North Basin ^[5]

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Total
2010									620	278	238	89	1,224
2011	4	288	413	685	841	1,080	929	957	661	528	188	178	6,751
2012	20	202	496	718	987	1,067	922	727	681	535	274	200	6,828
2013	47	96	163	172	193	246	232	313	304	269	268	280	2,582
2014	242	276	485	574	660	732	677	733	715	645	536	366	6,640
2015	323	407	596	669	673	693	717	726	599	505	467	385	6,759
2016	266	444	490	571	710	681	795	784	691	583	501	365	6,879
2017	267	298	556	586	737	799	728	673	628	579	356	339	6,545
2018	320	451	516	645	777	837	724	729	690	544	374	297	6,905
2019	302	353	536	624	649	785	775	759	620	570	365	235	6,572
Total													57,685

See also

• List of lakes in California
• List of lakes in the San Francisco Bay Area

External links

• • San Francisco Public utilities Commission official website
• (begins at 00:05:33)

Notes and References

1. H. Kenneth Hudnell . Mixing, De-Stratification, And Break-Point Chlorination In San Francisco's Sunset Reservoir . 2 . .PDF . SolarBee, Inc . April 2009 . 2009-10-13.
2. Web site: Public utilities Commission . Sunset Reservoir Upgrades - North Basin . City and County of San Francisco . 2009 . 2009-09-29.
3. Mayor Newsom Praises SFPUC For Approving New Five Megawatt Solar Project at Sunset Reservoir. https://web.archive.org/web/20160306084832/http://recurrentenergy.com/sites/default/files/081211%20Press%20Release%20-%20Mayor%20Newsom%20Praises%20SFPUC%20for%20Approving%205MW%20Project.pdf. March 6, 2016. SFPUC Communications and Public Outreach . 12 December 2008 . October 27, 2018.
4. KGO ABC7 News, December 2010
5. Web site: Sunset Reservoir North Basin, Monthly . Electricity Data Browser . . March 8, 2017.