Hebgen Dam: Difference between revisions
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[[Category:PPL Montana dams]] |
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Revision as of 06:59, 11 August 2012
| Hebgen Dam | |
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  Location of Hebgen Dam in the United States | |
| Dam and spillways | |
| Spillway type | Chute, gate-controlled |
The Hebgen Dam is a concrete-core earthen embankment dam on the Madison River in the U.S. state of Montana. The dam is 85 feet tall and 721 feet long. The dam is owned and operated by PPL Montana and its purpose is to store and regulate water for other downstream reservoirs and hydroelectric power plants.[2]
The dam was built in 1914 and created Hebgen Lake. After the 1959 Yellowstone earthquake, the dam was damaged but it was fixed several weeks later.[3] On August 30, 2008, two of the dam's four hydraulic gates failed, releasing 3,400 cubic feet (96 m3) per second of water into the Madison River. The normal discharge of the dam is 900 cubic feet (25 m3) per second and the gate failure caused a 1-foot rise in the river.[4]
References
- ^ "HEBGEN LAKE IS 65 MILES AROUND". Montana Standard. 19 August 1959. Retrieved 11 July 2010.
- ^ "Hebgen Lake". PPL Montana. Retrieved 11 July 2010.
- ^ "Hebgen Lake". Montana Official Travel Site. Retrieved 11 July 2010.
- ^ "Dam Failures, Dam Incidents (Near Failures)" (PDF). Association of State Dam Safety Officials. Retrieved 11 July 2010.
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