Hetch Hetchy Reservoir

Infobox lake
lake_name = Hetch Hetchy Reservoir
image_lake =
caption_lake =
image_bathymetry =
caption_bathymetry =
location = Yosemite National Park, California
coords = coord|37|57|12|N|119|46|39|W|region:US-CA_type:waterbody_source:gnis|display=inline,title
type = reservoir
inflow = Tuolumne River
outflow = Tuolumne River
catchment =
basin_countries = United States
length =
width =
area =
depth =
max-depth =
volume = convert|360000|acre.ft|abbr=on|lk=on
residence_time =
shore =
elevation = convert|3783|ft|m|abbr=on
islands =
cities =
frozen =

Hetch Hetchy Reservoir is a reservoir in Yosemite National Park, about 65 miles (105 km) northeast from the city of Merced, California. The reservoir has a capacity of 360,000 acre feet (440,000,000 m³) and is formed by O'Shaughnessy Dam in Hetch Hetchy Valley on the Tuolumne River. The dam is a concrete gravity feeding and is 364 feet (111 m) high. It was completed in 1923 and is owned by the city of San Francisco. The primary purpose is to supply drinking water to the San Francisco Bay Area, where it provides 85% of San Francisco's total water needs [cite web | url = http://sfwater.org/msc_main.cfm/MC_ID/13/MSC_ID/165 | title = San Francisco Water Sources] . The water is transported from the reservoir by the Hetch Hetchy Aqueduct. Hydroelectricity is also produced by Kirkwood Powerhouse and Moccasin Powerhouse, which have a capacity of 118 and 100 MW, respectively. Because Hetch Hetchy is a municipal water supply and its water is not filtered, swimming and boating are prohibited. Fishing is allowed, but only from the shore.

References

External links

* [http://www.bartleby.com/69/36/H03136.html Columbia Gazetteer of North America]
* [http://waterdata.usgs.gov/usa/nwis/uv?site_no=11275500 United States Geological Survey]
*Sarah Null PDF| [http://cee.engr.ucdavis.edu/faculty/lund/students/SarahNullThesis.pdf Water Supply Implications of Removing O'Shaughnessy Dam] |1.38 MiB , Thesis 2003
*gnis|261289