Gibson Reservoir is a man-made body of water located just south of the

Bob Marshall Wilderness The Bob Marshall Wilderness Area is a congressionally-designated wilderness area located in Western Montana region of the United States. It is named after Bob Marshall (1901–1939), an early forester in the federal government, conservationist, a ...

, northwest of Augusta,

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

. It forms part of the county line between Teton and Lewis & Clark counties. The

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

is formed by the concrete arch

Gibson Dam Gibson Dam is a concrete arch dam on the Sun River, a tributary of the Missouri River, about west of Great Falls, Montana in the United States. Located on the eastern edge of the Rocky Mountains, the dam was built by the U.S. Bureau of Reclama ...

and backs water up between a hilly pass for about 3 miles. The water in the dam is initially provided by spring

snow Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes. It consists of frozen crystalline water throughout ...

runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock market ...

and carried there via the North Fork Sun River and the South Fork Sun River right after the two join. The reservoir is mainly used for

irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow Crop, crops, Landscape plant, landscape plants, and Lawn, lawns. Irrigation has been a key aspect of agriculture for over 5,00 ...

control.

Climate

References

External links

Gibson Reservoir Bathymetric Map
Montana Fish, Wildlife & Parks {{authority control Reservoirs in Montana Buildings and structures in Teton County, Montana Protected areas of Flathead County, Montana Protected areas of Teton County, Montana Lewis and Clark National Forest Bodies of water of Teton County, Montana Lakes of Flathead County, Montana