Lake Yankton (South Dakota)

Lake Yankton
Cottonwood Lake
Lake Yankton, as seen from the Lewis & Clark Visitor Center.
Lake Yankton Show map of South Dakota Lake Yankton Show map of the United States
Location	Cedar County, Nebraska and Yankton County, South Dakota
Coordinates	42°51′20″N 97°28′21″W / 42.855509°N 97.472443°W / 42.855509; -97.472443
Type	reservoir
Primary outflows	Missouri River
Basin countries	United States
Max. length	1 mi (1.6 km)
Max. width	0.75 mi (1.21 km)
Surface area	250 acres (100 ha)
Max. depth	18 ft (5.5 m)
Surface elevation	1,168 ft (356 m)[1]
Islands	Lake Yankton Island

Lake Yankton, also called Cottonwood Lake, is an artificial lake that was originally part of the main channel of the Missouri River on the border of the U.S. States of Nebraska and South Dakota, near Yankton, South Dakota. The lake has an approximate surface area of 250 acres (100 ha) and has a maximum depth of 18 feet (5.5 m). The lake is located immediately downstream (east) of Gavins Point Dam and Lewis and Clark Lake, located just north of the current location of the main channel of the Missouri River.^[2]