Lewis and Clark Lake

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Lewis and Clark Lake
Lewis and Clark Lake behind Gavins Point Dam, near Yankton, South Dakota, on the Missouri River
Lewis and Clark Lake Show map of Nebraska Lewis and Clark Lake Show map of South Dakota Lewis and Clark Lake Show map of the United States
Location	Nebraska and  South Dakota,  United States
Coordinates	42°51′45″N 97°29′30″W / 42.8625°N 97.4917°W / 42.8625; -97.4917
Type	reservoir (artificial lake; man-made lake)
Primary inflows	Missouri River, Niobrara River
Primary outflows	Missouri River
Catchment area	16,000 sq mi (41,000 km2)
Basin countries	United States
Max. length	25 miles (40 km)
Max. width	1.8 miles (2.9 km) at dam
Surface area	31,400 acres (12,700 ha)
Average depth	15–30 ft (4.6–9.1 m)
Max. depth	45 ft (14 m)
Water volume	492,000 acre⋅ft (0.607 km3)[1]
Shore length1	90 mi (140 km)
Surface elevation	1,206–1,210 ft (368–369 m) msl
Settlements	Yankton, South Dakota Springfield, South Dakota Running Water, South Dakota Santee, Nebraska Niobrara, Nebraska
1 Shore length is not a well-defined measure.

Lewis and Clark Lake is a 31,400 acre (130 km²) reservoir located on the border of the U.S. states of Nebraska and South Dakota on the Missouri River. The lake is approximately 25 miles (40 km) in length with over 90 miles (140 km) of shoreline and a maximum water depth of 45 feet (14 m).^[2] The lake is impounded by Gavins Point Dam and is managed by the U.S. Army Corps of Engineers, Omaha District.