right|thumb|Course and watershed of the Bad River
The Bad River (Lakota: wakpá-šiča; "river-bad") is a tributary of the Missouri River, approximately long, in central South Dakota in the United States.
The river is formed at Philip, South Dakota, by the confluence of its North and South forks. The North Fork Bad River rises in eastern Pennington County and flows
The river basin is noted for deposits of manganese and fuller's earth. At the river mouth near Fort Pierre, the Bad River flood stage contains large quantities of silt. The Bad carries hard water of generally poor quality. The Bad River was called the Teton River by Lewis & Clark in 1804 as the place where they parlayed with Teton Lakota, but the name did not catch.
Industrial use
As of November 2019, TC Energy was applying for permits in the state to tap the Bad River to use water for the construction of Phase 4 of the Keystone pipeline, including camp construction to house transient construction workers.
See also
- List of rivers of South Dakota