John Day Dam

Infobox_Dam
dam_name=John Day Dam

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began=1958
open=1971
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map_width=200px
coordinates=coord|45|42|53|N|120|41|37|W|region:US_type:landmark
coord|45|43|04|N|120|41|38|W|region:US_type:landmark
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John Day Dam is a hydroelectric dam spanning the Columbia River in the northwestern United States. The dam features a navigation lock plus fish ladders on both sides. The reservoir impounded by the dam is Lake Umatilla, and it runs 76.4 miles (123 kilometers) up the river channel to the foot of the McNary Dam.

John Day Dam is part of the Columbia River Basin system of dams.

Location

John Day Dam is located 28 miles (45 km) east of the city of The Dalles, Oregon, and just below the mouth of the John Day River. The closest town on the Washington side is Goldendale, 20 miles (32 km) north. It joins Sherman County, Oregon with Klickitat County, Washington, 216 miles (348 kilometers) upriver from the mouth of the Columbia near Astoria, Oregon.

The United States Geological Survey has two entries for John Day Dam:
*Sherman County, Oregon at coord|45|42|53|N|120|41|37|W|, at an elevation of 164 ft. (50 m), and
*Klickitat County, Washington at coord|45|43|04|N|120|41|38|W|, at an elevation of 269 ft. (82 m).

History

Construction of the dam began in 1958 and was completed in 1971, (making it the newest dam on the lower Columbia), at a total cost of US$511 million. John Day Dam was built and is operated by the U.S. Army Corps of Engineers. The dam's power generation capacity is 2,160,000 kW.

Gallery

Statistics

* Altitude: 266 feet (81 m) above sea level
* Height: 183 feet (56 m)
* Length: 7,365 feet (2,327 m)
* Navigation lock:
** Single-lift
** 86 feet (26 m) wide
** 675 feet (206 m) long
* Powerhouse
** Sixteen 135,000-kilowatt units
** Total capacity: 2,160 megawatts
** Overload capacity: 2,485 MW
* Spillway
** Gates: 20
** Length: 1,228 feet (374 m)

See also

*Hydroelectric dams on the Columbia River

References

* | title=John Day Dam (Oregon - 164 ft. elev.) | work=Geographic Names Information System | publisher=United States Geological Survey | accessdate=2006-05-10
* | title=John Day Dam (Washington - 269 ft. elev.) | work=Geographic Names Information System | publisher=United States Geological Survey | accessdate=2006-05-10

External links

* [http://www.nwp.usace.army.mil/op/d/johnday.asp John Day Dam] U.S. Army Corps of Engineers
* [http://maps.google.com/maps?f=q&hl=en&q=45.715289,-120.692968&ie=UTF8&z=14&ll=45.715289,-120.692968&spn=0.046565,0.142479&om=1 Google Maps]

Crossings navbox
structure = Crossings
place = Columbia River
bridge = John Day Dam
bridge signs =
upstream = Umatilla Bridge
upstream signs =
downstream = Sam Hill Memorial Bridge
downstream signs =