Mammoth Pool Reservoir

Mammoth Pool Reservoir is a reservoir on the San Joaquin River in the Sierra Nevada, within the Sierra National Forest in California. It creates the border between Fresno County and Madera County. It is about 45 miles (72 km) north-northeast of Fresno.

Mammoth Pool Reservoir
LocationSierra National Forest
Fresno County, California
Madera County, California
Coordinates37.3541°N 119.309°W / 37.3541; -119.309
TypeReservoir
Primary inflowsSan Joaquin River
Primary outflowsSan Joaquin River
Catchment area998 sq mi (2,580 km2)
Basin countriesUnited States
Max. length5 mi (8.0 km)
Max. width1.5 mi (2.4 km)
Surface area1,100 acres (450 ha)
Water volume123,000 acre⋅ft (152,000,000 m3)
Surface elevation3,330 ft (1,010 m)
ReferencesU.S. Geological Survey Geographic Names Information System: Mammoth Pool Reservoir

Hydroelectric power

The 123,000 acre⋅ft (152,000,000 m3) reservoir is formed by Mammoth Pool Dam, an earth-fill dam completed in 1960.[1] It was built by Southern California Edison for hydroelectricity production. The dam's power plant can produce up to 190 megawatts. The dam, reservoir and power plant are part of the Big Creek Hydroelectric Project, perhaps the most extensive hydroelectric system in the world.

Recreation

The reservoir is also a recreation area. Activities at the lake include, swimming, fishing, camping and boating.

The reservoir is closed to the public during the month of May and the first half of June to allow migrating deer to swim across the reservoir, which spend the summer in the Sierra Nevada highlands.

The reservoir is inaccessible following the first snowstorm, usually occurring in November, as the access road is not snowplowed.[2]

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See also

References
  1. Department of Water Resources (2009). "Station Meta Data: Pine Flat Dam (PNF)". California Data Exchange Center. State of California. Retrieved 2009-08-28.
  2. US Forest Service (22 February 2009). "Sierra National Forest - Recreation, Lakes & Reservoirs:". U.S. Department of the Interior. Retrieved 2009-08-28.
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