Lewiston Dam (California)

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Lewiston Dam
Lewiston dam us bor.jpg
Official name Lewiston Dam[1]
Location Trinity County, California, United States[1]
Coordinates 40°43′30″N 122°47′46″W / 40.72500°N 122.79611°W / 40.72500; -122.79611Coordinates: 40°43′30″N 122°47′46″W / 40.72500°N 122.79611°W / 40.72500; -122.79611
Opening date 1963[1]
Operator(s) US Bureau of Reclamation [2]
Dam and spillways
Impounds Trinity River[1]
Height 91 ft (28 m)[2]
Length 745 ft (227 m)[2]
Creates Lewiston Lake
Total capacity 14,660 acre feet (18,080 dam3)[1]
Catchment area 718 sq mi (1,860 km2)[2]
Surface area 759 acres (307 ha)[1]
Power station
Installed capacity 350 KW
Annual generation 3,335,000 KWh

Lewiston Dam is an earthfill dam on the Trinity River that forms Lewiston Lake near Weaverville, California, United States.[2] The 91 ft (28 m) high earthfill dam is 7 mi (11 km) downstream of Trinity Dam and was built by the U.S. Bureau of Reclamation.[2] Construction was completed in 1963.[1] Lewiston Lake and Dam are part of the Central Valley Project, which harnesses the waters from the Sacramento River and San Joaquin River watersheds to irrigate the Central Valley, and provide hydroelectricity.[2]

See also[edit]


  1. ^ a b c d e f g NPDP site accessed 2008-01-10
  2. ^ a b c d e f g BoR site accessed 2008-01-10

External links[edit]