Rainbow Dam, Hydroelectric power station in Cascade County, Montana
Rainbow Dam stretches 322 meters across the Missouri River, creating a substantial barrier that harnesses water flow for electricity generation.
Constructed in 1910, the dam began its operations with eight generating units and was later acquired by Montana Power Company in 1912.
The dam takes its name from Rainbow Falls, a 14-meter waterfall that stands as the third of the five Great Falls of the Missouri.
The facility maintains a power output capacity of 36 megawatts, contributing to the regional electrical grid through its eight generating units.
Water from the dam travels through penstocks for over half a mile before returning to the river near Crooked Falls.
Location: Cascade County
Length: 322 m
GPS coordinates: 47.53440,-111.20500
Latest update: March 12, 2025 14:39
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