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Great Falls (Missouri River waterfall)

Great Falls
Ryan Dam.jpg
Great Falls and Ryan Dam
Great Falls (Missouri River waterfall) is located in Montana
Great Falls (Missouri River waterfall)
Map of Montana
Location Near Great Falls, Montana
Coordinates 47°34′07″N 111°07′27″W / 47.56862°N 111.1241°W / 47.56862; -111.1241Coordinates: 47°34′07″N 111°07′27″W / 47.56862°N 111.1241°W / 47.56862; -111.1241
Type Segmented block
Total height 87 ft (27 m)
Number of drops 1
Total width 900 ft (270 m)
Watercourse Missouri River
Average
flow rate
8,500 cu ft/s (240 m3/s)

Great Falls (also called Grand Falls or Big Falls) is a major waterfall located on the Missouri River in western Montana in the United States. It is the lowermost and largest of the eponymous Great Falls of the Missouri, at 87 feet (27 m) high and up to 900 feet (270 m) wide at peak flow. Although the falls used to flow powerfully year-round, most of the water is now diverted to the 60 megawatt hydroelectric plant of upstream Ryan Dam, reducing it to a trickle in the summer months. Grand Falls was named by William Clark of the Lewis and Clark Expedition in 1805.



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