Cheyenne River, River system in Wyoming and South Dakota, US.
The Cheyenne River is a river system that flows across eastern Wyoming and western South Dakota before meeting the Missouri River at Lake Oahe. Its waters travel through diverse landscapes before reaching this major confluence point.
The river system was fundamentally altered by the construction of Angostura Dam in 1949. This dam transformed the waterway into a managed system for irrigation and flood control.
The river holds deep meaning for the Lakota people, who call it Wakpá Wašté in their language. This name reflects the long connection between the tribe and the flowing water.
The river's water is used for agricultural irrigation and serves a large watershed area. Visitors can explore various points along the system to understand the landscape and water management infrastructure.
The river system feeds into multiple reservoirs as it travels through the region. These reservoirs play an important role in storing water for irrigation during drier times of the year.
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