Angostura Dam, Embankment dam in Fall River County, United States
The Angostura Dam spans across the Cheyenne River with an earth-fill embankment and concrete spillway section measuring 193 feet in height and 2,030 feet in length.
Construction of the dam took place between 1946 and 1949 as part of the Pick-Sloan Missouri Basin Program in response to severe drought conditions affecting farmers in the 1930s.
The surrounding Angostura Recreation Area, managed by South Dakota Department of Game, Fish, and Parks, provides opportunities for fishing, boating, and outdoor recreational activities.
The dam maintains irrigation services for 12,218 acres of agricultural land through the Angostura Canal, which can distribute water at a rate of 290 cubic feet per second.
The reservoir created by the dam extends over 36 miles of shoreline and contains multiple fish species including walleye, smallmouth bass, and crappie in its 4,706 acres of water.
Location: Fall River County
GPS coordinates: 43.34280,-103.43600
Latest update: March 13, 2025 11:36
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