Ice Harbor Dam

Ice Harbor Dam

Ice Harbor Dam from the west, north side of the Snake River.
Location Franklin / Walla Walla counties, Washington, USA
Construction began June 1955
Opening date 1962
Dam and spillways
Type of dam Concrete gravity, run-of-the-river
Height 100 feet (30 m)
Length 2,822 feet (860 m)
Impounds Snake River
Type of spillway Service, gate-controlled
Reservoir
Creates Lake Sacajawea
Capacity 249,000 acre·ft (0.307 km3)[1]
Surface area 8,375 acres (33.89 km2)
Power station
Turbines 3 x 90 MW units; 3 x 111 MW units[2]
Installed capacity 603 MW
Maximum capacity 693 MW

Ice Harbor Lock and Dam is a hydroelectric, concrete gravity run-of-the-river dam on the Snake River in Walla Walla and Franklin counties in the U.S. state of Washington.[3] The dam is located 8 miles (13 km) northeast of the town of Burbank and 12 miles (20 km) east of Pasco, river mile 9.7. Its name comes from a tiny bay in the river where boats once tied up to wait for upstream ice-jams to break up.[4]

Construction began in June 1955. The main structure and three generators were completed in 1961, with an additional three generators finished in 1976. Generating capacity is 603 megawatts, with an overload capacity of 693 MW. The spillway has ten gates and is 590 feet (180 m) long.

Ice Harbor Dam is part of the Columbia River Basin system of dams.

Inside the Dam on the South side of the river is a large visitor center that has been recently updated to include a new film "The Snake - River of Life" and a new modern interactive touch screen kiosk with information on the dam and recreational opportunities in the area. The visitor center also offers an excellent fish ladder viewing room where you can sit and observe the migration of Salmon, Steelhead and Shad. Due to security, visitors must pass through the security gate to gain access.

Lake Sacajawea, named for Sacajawea, is formed behind the dam. The lake stretches to the base of Lower Monumental Dam, 32 miles (50 km) upstream. The Wallula Channel, formed from the backup of Snake River entering the Columbia River just southeast of Pasco, runs 10 miles (16 km) downstream from the base of the dam.

Navigation lock

The highest temperature ever measured in Washington state, at 118 °F (47.8 °C), was recorded at Ice Harbor Dam on August 5, 1961.[5]

See also

References

  1. ^ "The Four Lower Snake River Dams". Bluefish.org. http://www.bluefish.org/fourdams.htm. Retrieved 17 July 2010. 
  2. ^ "Ice Harbor Dam". Washington.edu. http://www.cbr.washington.edu/crisp/hydro/ihr.html. Retrieved 17 July 2010. 
  3. ^ "The Columbia River System Inside Story". BPA.gov. pp. 14–15. http://www.bpa.gov/power/pg/columbia_river_inside_story.pdf. Retrieved 17 July 2010. 
  4. ^ "Ice Harbor Dam". Washington Place Names database. Tacoma Public Library. http://search.tpl.lib.wa.us/wanames/. Retrieved 2009-03-06. 
  5. ^ "United States Extreme Record Temperatures & Differences". http://ggweather.com/climate/extremes_us.htm. Retrieved 2008-11-22. 

External links