Hebgen Dam: Difference between revisions
Added external link; revised Introduction and History sections; |
m Bot: link syntax and minor changes |
||
| Line 40: | Line 40: | ||
Hebgen Dam was built across the Madison River in 1914 by Montana Power Company to create [[Hebgen Lake]]. |
Hebgen Dam was built across the Madison River in 1914 by Montana Power Company to create [[Hebgen Lake]]. |
||
During the 7.5 magnitude [[1959 Hebgen Lake earthquake]], the dam was damaged, primarily because of such intense ground movement that water surged over the dam crest four different times, but it was fixed several weeks later.<ref>{{cite web|title=Hebgen Lake|url=http://www.visitmt.com/categories/moreinfo.asp?IDRRecordID=13850&siteid=1|publisher=Montana Official Travel Site|accessdate=11 July 2010}}</ref> The epicenter of the quake was determined to be {{convert|20|miles|km}} beneath the bottom of Hebgen Lake. Seismologists reported it to be the fourth largest quake recorded in the United States up to that time.<ref name="Tuholske">[http://www.distinctlymontana.com/montana-parks/09/09/2008/earthquake-yellowstone |
During the 7.5 magnitude [[1959 Hebgen Lake earthquake]], the dam was damaged, primarily because of such intense ground movement that water surged over the dam crest four different times, but it was fixed several weeks later.<ref>{{cite web|title=Hebgen Lake|url=http://www.visitmt.com/categories/moreinfo.asp?IDRRecordID=13850&siteid=1|publisher=Montana Official Travel Site|accessdate=11 July 2010}}</ref> The epicenter of the quake was determined to be {{convert|20|miles|km}} beneath the bottom of Hebgen Lake. Seismologists reported it to be the fourth largest quake recorded in the United States up to that time.<ref name="Tuholske">[http://www.distinctlymontana.com/montana-parks/09/09/2008/earthquake-yellowstone Tuholske, Lily. "Yellowstone Earthquake at the Madison River." Distinctly Montana. September 9, 1998.]] Accessed March 18, 2018.</ref> |
||
On August 30, 2008, two of the dam's four hydraulic gates failed, releasing {{convert|3400|ft3|m3}} per second of water into the Madison River. The normal discharge of the dam is {{convert|900|ft3|m3}} per second and the gate failure caused a 1-foot rise in the river.<ref>{{cite web|title=Dam Failures, Dam Incidents (Near Failures)|url=http://www.damsafety.org/media/Documents/PRESS/US_FailuresIncidents.pdf|publisher=Association of State Dam Safety Officials|accessdate=11 July 2010|deadurl=yes|archiveurl=https://web.archive.org/web/20100705035133/http://www.damsafety.org/media/Documents/PRESS/US_FailuresIncidents.pdf|archivedate=5 July 2010|df=}}</ref> |
On August 30, 2008, two of the dam's four hydraulic gates failed, releasing {{convert|3400|ft3|m3}} per second of water into the Madison River. The normal discharge of the dam is {{convert|900|ft3|m3}} per second and the gate failure caused a 1-foot rise in the river.<ref>{{cite web|title=Dam Failures, Dam Incidents (Near Failures)|url=http://www.damsafety.org/media/Documents/PRESS/US_FailuresIncidents.pdf|publisher=Association of State Dam Safety Officials|accessdate=11 July 2010|deadurl=yes|archiveurl=https://web.archive.org/web/20100705035133/http://www.damsafety.org/media/Documents/PRESS/US_FailuresIncidents.pdf|archivedate=5 July 2010|df=}}</ref> |
||
==See also== |
==See also== |
||
[[1959 Hebgen Lake earthquake]] |
[[1959 Hebgen Lake earthquake]] |
||
==References== |
==References== |
||
| Line 53: | Line 51: | ||
==External links== |
==External links== |
||
[http://www.distinctlymontana.com/montana-parks/09/09/2008/earthquake-yellowstone "Yellowstone earthquake at the Madison River." Tuholske, Lily. "Yellowstone Earthquake at the Madison River." Distinctly Montana. September 9, 1998.] Accessed March 18, 2018.</ref> |
|||
[[Category:Dams in Montana]] |
[[Category:Dams in Montana]] |
||
Revision as of 06:15, 23 April 2018
| Hebgen Dam | |
|---|---|
 The damaged Hebgen Dam in 1959 | |
  Location of Hebgen Dam in the United States | |
| Official name | Hebgen Dam |
| Location | Gallatin County, Montana |
| Coordinates | 44°51′49″N 111°20′08″W / 44.86361°N 111.33556°W |
| Opening date | 1914 |
| Owner(s) | NorthWestern Corporation |
| Dam and spillways | |
| Type of dam | Concrete-core, earthen embankment |
| Impounds | Madison River |
| Height | 85 feet (26 m) |
| Length | 721 feet (220 m) |
| Spillway type | Chute, gate-controlled |
| Reservoir | |
| Creates | Hebgen Lake |
| Total capacity | 325,000 acre⋅ft (0.401 km3)[1] |
| Catchment area | 905 square miles (2,340 km2) |
| Surface area | 21 square miles (54 km2) |
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's purpose is to store and regulate water for other downstream reservoirs and hydroelectric power plants.[2] Montana Power Company originally built the dam, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014.
History
Hebgen Dam was built across the Madison River in 1914 by Montana Power Company to create Hebgen Lake.
During the 7.5 magnitude 1959 Hebgen Lake earthquake, the dam was damaged, primarily because of such intense ground movement that water surged over the dam crest four different times, but it was fixed several weeks later.[3] The epicenter of the quake was determined to be 20 miles (32 km) beneath the bottom of Hebgen Lake. Seismologists reported it to be the fourth largest quake recorded in the United States up to that time.[4]
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.[5]
See also
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.
- ^ Tuholske, Lily. "Yellowstone Earthquake at the Madison River." Distinctly Montana. September 9, 1998.] Accessed March 18, 2018.
- ^ "Dam Failures, Dam Incidents (Near Failures)" (PDF). Association of State Dam Safety Officials. Archived from the original (PDF) on 5 July 2010. Retrieved 11 July 2010.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help)
External links
"Yellowstone earthquake at the Madison River." Tuholske, Lily. "Yellowstone Earthquake at the Madison River." Distinctly Montana. September 9, 1998. Accessed March 18, 2018.</ref>
 | This article about a dam or floodgate in the United States is a stub. You can help Wikipedia by expanding it. |