Gavins Point Dam

Gavins Point Dam is a hydroelectric dam on the Missouri River in the U.S. states of Nebraska and South Dakota.
Built from 1952 to 1957, it impounds Lewis and Clark Lake. The dam is on the Nebraska-South Dakota border, west of Yankton, South Dakota.
Gavins Point Dam is the lowermost dam on the Missouri, and was built as part of the Pick-Sloan Plan. The dam area (with Lewis and Clark Lake) is a very popular regional tourist destination. The next dam upstream is the Fort Randall Dam.
The stretch of the Missouri immediately downstream of Gavins Point Dam is the only significant section of non-channelized meandering stream on the lower portion of the river. This federally designated Wild and Scenic River is among the last free-flowing stretches of the Missouri; it exhibits the islands, bars, chutes, and snags that once characterized the “Mighty Mo”.
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Content: Wikipedia