Big Bend dam

Big Bend dam
	location
Coordinates	44 ° 2 '58 " N , 99 ° 26' 55" W Coordinates: 44 ° 2 '58 " N , 99 ° 26' 55" W.
country	United States
place	Buffalo and Lyman Counties , South Dakota
Waters	Missouri River
Height upstream	434 m
	power plant
owner	United States Army Corps of Engineers (USACE)
operator	USACE
construction time	1959 to 1966
Start of operation	1964
	technology
Bottleneck performance	494 megawatts
Average ; height of fall	21 m
Standard work capacity	986 million kWh / year
Turbines	Kaplan turbines : 3 × 67.3 MW, 5 × 58.5 MW
	Others

The dam Big Bend ( english Big Bend Dam ) is a dam with hydroelectric power plant in the state of South Dakota , USA . It dams the Missouri River , which forms the border between Buffalo and Lyman Counties at this point , to form a reservoir ( Lake Sharpe ). The small town of Fort Thompson is located on the left bank of the river in the immediate vicinity of the dam.

Construction of the dam began in 1959. It was completed in 1964. The dam is primarily used to generate electricity and protect against flooding . It is owned and operated by the United States Army Corps of Engineers (USACE) and is also operated by USACE.

Barrier structure

The barrier structure is an earth embankment dam with a height of 29 m (95 ft ) above the foundation level . The power plant's machine house is on the right-hand side of the river, the weir system with the flood relief on the left. The weir system consists of 8 weir fields.

The dam crest is at an altitude of 434 m (1423 ft) above sea level . The length of the dam crest (including the weir) is 3,222 m (10,570 ft). The maximum width of the dam is 366 m (1200 ft) at the base. The volume of the dam is 13 million m³ (17 million cubic yards ); 412,860 m³ (540,000 cubic yards) of concrete were used.

A maximum of 7645 m³ / s (270,000 cft / s) can be discharged via the flood relief .

Reservoir

At the normal storage target of 433 m (1420 ft), the reservoir extends over an area of around 230.2 km² (56,884 acres ) and holds 2.22 billion m³ (1.8 million acre-feet ) of water; it reaches a length of 129 km (80 miles ). The impoundment began in December 1963; the congestion destination was reached in December 1966.

power plant

The power plant's machine house is on the right side of the dam. The installed capacity of the power plant is 494 MW . The average annual production is 986 million kWh . Of the 8 Kaplan turbines in the power plant, 3 have a maximum of 67.3 MW and the remaining 5 a maximum of 58.5 MW each. The nominal speed of the turbines is 82 / min. The drop height is 21 m (70 ft).

Web links

Commons : Big Bend Dam - collection of pictures, videos and audio files

Individual evidence

↑ ^a ^b ^c Big Bend Project Statistics. United States Army Corps of Engineers (USACE), accessed January 2, 2019 .
^ Feasibility of introducing cold water fish into Lake Sharpe, South Dakota. (PDF) lib.dr.iastate.edu, p. 2 (8) , accessed on January 2, 2019 (English).
↑ Big Bend Dam & Lake Sharpe. USACE, accessed January 2, 2019 .

[usace1-1] Big Bend Project Statistics. United States Army Corps of Engineers (USACE), accessed January 2, 2019 .

[lib-2] Feasibility of introducing cold water fish into Lake Sharpe, South Dakota. (PDF) lib.dr.iastate.edu, p. 2 (8) , accessed on January 2, 2019 (English).

[usace2-3] Big Bend Dam & Lake Sharpe. USACE, accessed January 2, 2019 .