Following is a list of dams and reservoirs in Montana. All major dams are linked below. The National Inventory of Dams defines any "major dam" as being tall with a storage capacity of at least , or of any height with a storage capacity of .

Dams and reservoirs in Montana

Fort Peck Dam (Fort Peck Montana) Spillway 01

:''This list is incomplete. You can help Wikipedia by expanding it.'' *

Black Eagle Dam Black Eagle Dam is a hydroelectric gravity weir dam located on the Missouri River in the city of Great Falls, Montana. The first dam on the site, built and opened in 1890, was a timber-and-rock crib dam.Peterson, p. 59. This structure was the ...

, unnamed reservoir, NorthWestern Energy * Box Elder Creek Dam, Boxelder Lake, City of Plentywood * Bynum Reservoir Dam,

Bynum Reservoir Bynum may refer to: People with the surname * Andrew Bynum (born 1987), American basketball player * Clarke Bynum, American basketball player * Freddie Bynum, American baseball player * G. T. Bynum, American politician; mayor of Tulsa, Oklahoma ...

, Teton Cooperative Reservoir Company * Canyon Ferry Dam,

Canyon Ferry Lake Canyon Ferry Lake is a reservoir on the Missouri River near Helena, Montana and Townsend, Montana. It is Montana's third largest body of water, covering and of shor(1) It was formed by the building of Canyon Ferry Dam, which was completed in ...

United States Bureau of Reclamation The Bureau of Reclamation, and formerly the United States Reclamation Service, is a federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it applies to the oversight and opera ...

Clark Canyon Dam Clark Canyon Dam is an earthfill dam located in Beaverhead County, Montana, about 20 miles (30 km) south of the county seat of Dillon. The dam impounds the waters of the Beaverhead River, creating a body of water known as Clark Canyon Reserv ...

, Clark Canyon Reservoir, USBR *

Cochrane Dam Cochrane Dam is a run-of-the river hydroelectric dam on the Missouri River, about northeast of Great Falls in the U.S. state of Montana. The dam has a concrete gravity design and is high and long. Its power station has two generators capabl ...

, unnamed reservoir, NorthWestern Energy *

Como Dam Como Dam () is a dam in Ravalli County, Montana, in the far western part of the state. Como Dam was originally constructed by local farmers around 1910, to impound a natural lake for irrigation storage; the United States Bureau of Reclamation enh ...

, Como Lake, USBR * Cooney Dam, Cooney Reservoir, State of Montana *

Fort Peck Dam The Fort Peck Dam is the highest of six major dams along the Missouri River, located in northeast Montana in the United States, near Glasgow, and adjacent to the community of Fort Peck. At in length and over in height, it is the largest hyd ...

Fort Peck Lake Fort Peck Lake, or Lake Fort Peck, is a major reservoir in Montana, formed by the Fort Peck Dam on the Missouri River. The lake lies in the eastern prairie region of Montana approximately east of Great Falls and north of Billings, reaching in ...

United States Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...

* Fresno Dam, Fresno Reservoir, USBR *

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 ...

Gibson Reservoir Gibson Reservoir is a man-made body of water located just south of the Bob Marshall Wilderness, northwest of Augusta, Montana. It forms part of the county line between Teton and Lewis & Clark counties. The reservoir is formed by the concrete a ...

, USBR * Hauser Dam, Hauser Lake, NorthWestern Energy *

Hebgen Dam Hebgen Dam is a concrete-core earthen embankment dam in the western United States, located on the Madison River in southwestern Montana. The dam is tall and in length; its purpose is to store and regulate water for other downstream reservoirs an ...

Hebgen Lake Hebgen Lake is a reservoir created by the Hebgen Dam, located in Gallatin County in southwest Montana. It is well known for the 1959 Hebgen Lake earthquake (magnitude 7.1 to 7.5) which occurred nearby on August 17, 1959, forming Quake Lake, whic ...

, NorthWestern Energy *

Holter Dam Holter Dam is a hydroelectric straight gravity dam on the Missouri River about northeast of Helena, Montana, in the United States.''Upper Missouri River Reservoir Fisheries Management Plan, 2010-2019,'' Montana Department of Fish, Wildlife and ...

, Holter Lake, NorthWestern Energy *

Hungry Horse Dam Hungry Horse Dam is an arch dam in the Western United States, western United States, on the South Fork Flathead River in the Rocky Mountains of northwest Montana. It is located in Flathead National Forest in Flathead County, Montana, Flathead Cou ...

, Hungry Horse Reservoir, USBR * Kicking Horse Dam, Kicking Horse Reservoir,

Bureau of Indian Affairs The Bureau of Indian Affairs (BIA), also known as Indian Affairs (IA), is a United States federal agency within the Department of the Interior. It is responsible for implementing federal laws and policies related to American Indians and A ...

Libby Dam Libby Dam is a concrete gravity dam in the northwestern United States, on the Kootenai River in northwestern Montana. Dedicated on it is west of the continental divide A continental divide is a drainage divide on a continent such that the dr ...

Lake Koocanusa Lake Koocanusa () is a reservoir in British Columbia (Canada) and Montana (United States) formed by the damming of the Kootenai River by the Libby Dam in 1972. The Dam was formally dedicated by President Gerald Ford on August 24, 1975. The lake ...

, USACE * Lower Two Medicine Dam,

Lower Two Medicine Lake Lower Two Medicine Lake is located partly in Glacier National Park as well as on the Blackfeet Indian Reservation, in the U. S. state of Montana. The lake is natural but has a small dam which regulates the lake level and reduces the potential for ...

Lake Elwell Lake Elwell (a.k.a. Tiber Reservoir) is a reservoir in north central Montana. The reservoir was created by the damming of the Marias River at the Tiber Dam. Lake Elwell was named for Judge Charles B. Elwell (1888–1974), former director of the ...

Madison Dam Madison Dam is a hydroelectric dam on the Madison River in Madison County, Montana, in the southwestern part of the state. The timber-crib dam was constructed in 1906 as a replacement for a similar 1901 dam and powerhouse on the same site. The dam ...

Ennis Lake Madison Dam is a hydroelectric dam on the Madison River in Madison County, Montana, in the southwestern part of the state. The timber-crib dam was constructed in 1906 as a replacement for a similar 1901 dam and powerhouse on the same site. The dam ...

, NorthWestern Energy *

Milltown Dam The Milltown Reservoir Sediments Superfund Site is a major Superfund site in Missoula County, Montana, seven miles east of Missoula. It was added to the National Priorities List in 1983 when arsenic groundwater contamination was found in the Mil ...

(removed) *

Morony Dam Morony Dam is a hydroelectric gravity dam located on the Missouri River in Cascade County, Montana. The dam is long and high, and generates 49 megawatts (MW) of power. Overview The dam is named after John G. Morony,Peterson, p. 74. a banker, ...

, unnamed reservoir, NorthWestern Energy *Mystic Lake Dam, Mystic Lake, NorthWestern Energy *

Noxon Rapids Dam Noxon Rapids Dam is an earthfill gravity-type hydroelectric dam on the Clark Fork river, in the northwest part of the U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a po ...

, Noxon Reservoir,

Avista Avista Corporation is an American energy company which generates and transmits electricity and distributes natural gas to residential, commercial, and industrial customers. Approximately 1,550 employees provide electricity, natural gas, and other ...

Rainbow Dam Rainbow Dam is a hydroelectric dam on the Missouri River, high and long, located six miles northeast of Great Falls in the U.S. state of Montana. History The dam is named for the downstream Rainbow Falls, a waterfall that is the third of t ...

, unnamed reservoir, NorthWestern Energy *

Ryan Dam Ryan Dam is a hydroelectric dam on the Missouri River, downstream from the city of Great Falls, Montana, Great Falls in the U.S. state of Montana. The dam is long and high; its reservoir is long and has a storage capacity of . It is a Run-of-th ...

, unnamed reservoir, NorthWestern Energy *

Lake Sherburne Dam Lake Sherburne Dam is a high compacted earthfill dam built between 1914 and 1921, just outside the boundary of Glacier National Park, Montana, its reservoir extending into the park. The dam impounds Swiftcurrent Creek as it flows out of the par ...

Lake Sherburne Lake Sherburne is located in the Many Glacier region of Glacier National Park, in the U.S. state of Montana. The lake is a reservoir, formed by Lake Sherburne Dam, which impounded Swiftcurrent Creek and was constructed in between 1914 and 1921. ...

, USBR * SKQ Dam,

Flathead Lake Flathead Lake ( fla, člq̓etkʷ, label=Salish, kut, yawuʔnik̓ ʔa·kuq̓nuk) is a large natural lake in northwest Montana. The lake is a remnant of the ancient, massive glacial dammed lake, Lake Missoula of the era of the last interglacial. ...

, Energy Keepers Inc. *

Swift Dam Swift Dam or Swift No. 1 is an earth-type hydroelectric dam on the Lewis River, in the U.S. state of Washington. Completed in 1958, it is located in Skamania County and its reservoir is called Swift Reservoir. See also *List of dams in the Colu ...

, Swift Reservoir, Pondera County Canal and Reservoir Company * Thompson Falls Dam, unnamed reservoir, NorthWestern Energy *

Tiber Dam Tiber Dam, located in southern Liberty County in northern Montana, USA, is a dam on the Marias River which forms Lake Elwell, also known as Tiber Reservoir. Construction on the dam began in 1952 and it was complete in 1956. Between 1967 and 1969, ...

, USBR *

Tongue River Dam The Tongue River Dam () is a dam in Big Horn County, Montana Big Horn County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 13,124. The county seat is Hardin. The county, like the river and the m ...

, Tongue River Reservoir,

Montana Department of Natural Resources and Conservation The Montana Department of Natural Resources and Conservation (DNRC) is a government agency in the executive branch state of Montana in the United States with responsibility for ensuring sustainable development of the state's land, mineral, natura ...

* Toston Dam, Toston Reservoir, Montana Department of Natural Resources * Willow Creek Dam, Willow Creek Reservoir, USBR *

Yellowtail Dam Yellowtail Dam is a dam across the Bighorn River in south central Montana in the United States. The mid-1960s era concrete arch dam serves to regulate the flow of the Bighorn for irrigation purposes and to generate hydroelectric power. The dam an ...

, Bighorn Lake, USBR

References

{{Dams and reservoirs in US

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 ...

Dams A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, ...