North Dam

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North Dam
( Banks Lake )
North Dam.png
Location: Grand Coulee in Grant County , Washington (USA)
Tributaries: Feeder Canal
Drain: Banks Lake
North Dam (Banks Lake) (Washington)
North Dam (Banks Lake)
Coordinates 47 ° 56 '27 "  N , 119 ° 1' 3"  W Coordinates: 47 ° 56 '27 "  N , 119 ° 1' 3"  W.
Data on the structure
Construction time: 1946-1951
Height of the barrier structure : 145 ft (44 m)
Height of the structure crown: 1,580 ft (482 m)
Crown length: 1,450 ft (442 m)
Operator: United States Bureau of Reclamation
Data on the reservoir
Altitude (at congestion destination ) 1,570 ft (479 m)
Water surface 27,000 acres (109 km²)dep1
Storage space 882 000 000  m³
Total storage space : 1 573 000 000  m³
Catchment area 721 km²

The North Dam is an earth dam near the city of Grand Coulee in Grant County in the US state of Washington . Construction of the dam began in 1946 and was completed in 1951. Together with the Dry Falls Dam , located about 22 mi (35 km) southeast, the North Dam creates Banks Lake in the historic river bed of the Columbia River , the Grand Coulee . The lake serves as a compensation basin for the Columbia Basin Project . Near the left end of the North Dam is the inlet from the project's feeder canal. The canal serves either as a water supplier for the pumped storage plant at Grand Coulee Dam or for the backflow into Banks Lake from the same pumped storage plant.

The North Dam, located near the town of Grand Coulee, has a maximum height of 145 ft (44 m) and a crown length of 1,400 ft (427 m). The geographic height of both dams is 1,580 ft (482 m), and the maximum water table height of Banks Lake is 1,570 ft (479 m). Both North Dam and Dry Falls Dam have a freeboard of about three meters to protect against the waves breaking up in strong winds.

Web links

Individual evidence

  1. ^ A b United States Bureau of Reclamation: North Dam: General . June 21, 2012. Retrieved January 23, 2015.
  2. ^ A b The Story of the Columbia Basin Project . United States Government Printing Office, Washington DC 1964, p. 59 (Retrieved January 23, 2015).
  3. ↑ United States Bureau of Reclamation: Dry Falls Dam: Hydraulics and Hydrology . May 17, 2012. Retrieved January 23, 2015.
  4. ^ North Dam - Overview . US Bureau of Reclamation. Retrieved January 24, 2015.
  5. ^ Draft Environmental Statement, Columbia Basin Project, Washington; Columbia Basin Project, Ephrata, Washington; Department of the Interior, (INT DES-75-3), Bureau of Reclamation, Department of the Interior; Washington, DC; 1975