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Angostura Reservoir
Angosturadam.jpg
Angostura Dam
Location of Angostura Reservoir in South Dakota, USA.
Location of Angostura Reservoir in South Dakota, USA.
Angostura Reservoir
Location in South Dakota
Location of Angostura Reservoir in South Dakota, USA.
Location of Angostura Reservoir in South Dakota, USA.
Angostura Reservoir
Location in the United States
Location Fall River County, South Dakota, United States. Near Hot Springs, South Dakota
Coordinates 43°20′36″N 103°26′16″W / 43.34333°N 103.43778°W / 43.34333; -103.43778
Type artificial lake
Primary inflows Cheyenne River Dry Creek Horsehead Creek Tepeee Creek
Primary outflows Cheyenne River
Basin countries United States
Surface area 4,407 acres (17.83 km2)
Max. depth 75 ft (23 m)
Shore length1 42 mi (68 km)
Surface elevation 3,127 ft (953 m)
1 Shore length is not a well-defined measure.

Angostura Reservoir is a reservoir on the Cheyenne River in Fall River County, South Dakota, United States. It was created after the construction of Angostura Dam in 1949 for irrigation by the U.S. Bureau of Reclamation. "Angostura" means "narrows" in Spanish.

The reservoir covers an area of 4,407 acres (17.83 km2), has a surface elevation of 3,127 ft (953 m), and a maximum depth of 75 ft (23 m).

The Angostura Recreation Area surrounds the lake and is a popular location for boating, swimming, camping, and fishing. The lake supports populations of walleye, northern pike, smallmouth bass, and sunfish. As one of the only large bodies of water in the area, Angostura Reservoir is also an important location for migratory birds.

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