Garrison Dam

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Garrison Dam
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Aerial view from the southeast, impounding Lake Sakakawea on the Missouri River
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CountryUnited States
LocationMcLean/Mercer counties, North Dakota
CoordinatesLua error: callParserFunction: function "#coordinates" was not found.
StatusOperational
Construction began1947;
79 years ago (1947)
Opening date1953;
73 years ago (1953)
Construction cost$300 million
OwnerTemplate:Pluralize from textU.S. Army Corps of Engineers, Omaha District
Dam and spillways
Type of damEmbankment, rolled earth-fill
ImpoundsMissouri River
HeightTemplate:Cvt
LengthTemplate:Cvt
Elevation at crest1,854 feet (565 m) msl
Width (crest)Template:Cvt
Width (base)Template:Cvt
Dam volumeTemplate:Cvt[1]
Spillway typeService, 28 controlled-gates
Spillway capacityTemplate:Cvt[2]
Reservoir
CreatesLake Sakakawea
Total capacityTemplate:Cvt[2]
Catchment areaTemplate:Cvt
Surface areaTemplate:Cvt
Maximum lengthTemplate:Cvt
Maximum water depthTemplate:Cvt
Normal elevationTemplate:Cvt (max)
Power Station
OperatorTemplate:Pluralize from textU.S. Army Corps of Engineers
Commission dateJanuary 1956–October 1960[2]
Turbines3 x 121.6 MW, 2 x 109.25 Francis type
Installed capacity583.3 MW[3]
Annual generation2,250 GWh (1967-2009 Average)[2]
Website
www.nwo.usace.army.mil/Missions/Dam-and-Lake-Projects/Missouri-River-Dams/Garrison/

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Garrison Dam is an earth-fill embankment dam on the Missouri River in central North Dakota, U.S. Constructed by the U.S. Army Corps of Engineers from 1947 to 1953, at over two miles (3.2 km) in length, the dam is the fifth-largest earthen dam in the world.[4] The reservoir impounded by the dam is Lake Sakakawea, which extends to Williston and the confluence with the Yellowstone River, near the Montana border. The dam and resulting reservoir inundated approximately one-sixth (16.6%) to one-fourth (25%) of Fort Berthold Indian Reservation's land, resulting in the loss of homes, farmland, and community infrastructure for the Three Affiliated Tribes.

Location

Garrison Dam is located between Riverdale and Pick City, and named after the town of Garrison, directly north of the dam, across the reservoir. The dam is approximately midway between Bismarck and Minot, about 10 miles (16 km) west of U.S. Highway 83.

History

Dams and reservoirs in the Pick–Sloan Program, and affected Indian reservations.

The dam was part of a flood control and hydroelectric power generation project named the Pick-Sloan Project along the river, after the two plan developers, Col. Lewis A. Pick and William Glenn Sloan. Local communities in the area had resisted having the dam built at other locations on the river where they would be affected.

In order to construct the dam, the US government needed to purchase 152,360 acres (616.6 km2) of bottomlands in the Fort Berthold Reservation that would be flooded by the creation of Lake Sakakawea. These lands were owned by the Three Affiliated Tribes, and the territory "had been their home for perhaps more than a millennium".[5]Template:Rp

Threatened by confiscation under eminent domain, the tribes protested. A complete block of Garrison Dam power was denied because it would violate the 1935 Rural Electrification Act. The tribes gained remuneration, but lost 94% of their agricultural land[6]Template:Rp in 1947, when they were forced to accept $5,105,625. This amount was increased to $7.5 million in 1949, but it did not fully compensate them for the loss of their important farmlands, homes, towns, and graves. They had cultivated the bottomlands and were able to be largely self-sufficient.[6]Template:Rp

The final settlement legislation denied the tribes' right to use the reservoir shoreline for traditional grazing, hunting, fishing or other purposes, including irrigation development and royalty rights on all subsurface minerals within the reservoir area.[6]Template:Rp About 1,700 residents were forcibly relocated, some to New Town, North Dakota at the northern end of the reservation.[7]

Thus, construction of Garrison Dam almost totally destroyed the traditional way of life for the Three Affiliated Tribes and made them much more dependent on the federal government. In addition, the size of the lake, and the lack of bridges to cross it for decades, disrupted traditional relations among the peoples. It created new divisions among the segments on the reservation.[6]Template:Rp Construction on the $300-million dam project began in 1947, and its embankment was enclosed in April 1953. The dam was dedicated by President Eisenhower two months later. The Corps of Engineers completed earthwork in the fall of 1954.[3]

Garrison Dam is one of six Missouri River Main stem dams operated by the U.S. Army Corps of Engineers, Omaha District. The dam upstream of Garrison Dam is Fort Peck Dam (near Fort Peck, Montana). The dams downstream of Garrison Dam are: Oahe Dam (near Pierre, South Dakota), Big Bend Dam (near Fort Thompson, South Dakota), Fort Randall Dam (near Pickstown, South Dakota), and Gavins Point Dam (near Yankton, South Dakota). These six mainstem dams impound these Missouri River reservoirs with a total combined water storage capacity of approximately Template:Cvt and approximately 1,111,884 acres (449,963 ha) of water surface area.

In June 2011, in response to the 2011 Missouri River Floods, the dam was releasing more than 140,000 cubic feet per second (4,000 m3/s), which greatly exceeded its previous record release of Template:Cvt set in 1997.[8] The first use of the emergency spillway due to flooding started on June 1, 2011, at 8:00am.[9]

Energy generation

Hydropower turbines at Garrison Dam have an electric power generating nameplate capacity of 583.3 MW.[2] Average production of 257 MW serves several hundred thousand customers.[10][2]

Fishing & Recreation

The Garrison Dam National Fish Hatchery is the world's largest walleye and northern pike producing facility and also works to restore endangered species, such as the pallid sturgeon.[11]

A segment of the North Country National Scenic Trail passes through the National Fish Hatchery and includes a stretch along the Missouri River shoreline where trail users are simultaneously on the Lewis & Clark National Historic Trail.[12]

See also

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content."Garrison Dam/ Powerplant". U.S. Army Corps of Engineers. Archived from the original on 24 October 2004. Retrieved 19 June 2011.
  2. ^ a b c d e f Page Module:Citation/CS1/styles.css has no content."Summary of Engineering Data – Missouri River Main Stem System" (PDF). Missouri River Division. U.S. Army Corps of Engineers. August 2010. Archived (PDF) from the original on 2013-02-16. Retrieved 2012-08-17.
  3. ^ a b Page Module:Citation/CS1/styles.css has no content."Facts about Garrison Dam and power plant" (PDF). U.S. Army Corps of Engineers. n.d. Archived from the original (PDF) on 1 June 2011. Retrieved 19 June 2011.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Garrison Dam and Powerplant". U.S. Army Corps of Engineers. Archived from the original on October 24, 2004.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Meyer, Roy W (1977). The Village Indians of the Upper Missouri: The Mandans, Hidatsas, and Arikaras. Lincoln: University of Nebraska Press.
  6. ^ a b c d Page Module:Citation/CS1/styles.css has no content.Lawson, Michael L. (1982). Dammed Indians: the Pick-Sloan Plan and the Missouri River Sioux, 1944–1980. Norman: University of Oklahoma Press.
  7. ^ Page Module:Citation/CS1/styles.css has no content."The History and Culture of the Mandan, Hidatsa, and Sahnish". North Dakota Studies curriculum for grades 4 and 8. State of North Dakota. n.d. Archived from the original on 7 October 2011. Retrieved 12 February 2012.
  8. ^ Page Module:Citation/CS1/styles.css has no content."Missouri River Mainstem Reservoir Bulletin" (pdf). Army Corps of Engineers. Retrieved 18 June 2011.[permanent dead link]
  9. ^ Page Module:Citation/CS1/styles.css has no content."Spillway spectacle". Minot Daily News. June 4, 2011. Archived from the original on 2015-10-19. Retrieved 1 December 2014.
  10. ^ 2,250,000 kWh / (365 days x 24 hours/day x 583.3 MW) = 44% capacity factor. 583.3 MW X 44% = 256.65 MW
  11. ^ Page Module:Citation/CS1/styles.css has no content."Garrison Dam National Fish Hatchery".
  12. ^ Page Module:Citation/CS1/styles.css has no content."Garrison Dam National Fish Hatchery NCT segment map".

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