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Rock Island Dam information


Rock Island Dam
Rock Island Dam from Washington SR 28
LocationChelan / Douglas counties, Washington
Coordinates47°20′32″N 120°05′41″W / 47.342155°N 120.094773°W / 47.342155; -120.094773
Construction began1930
Opening date1933
Dam and spillways
ImpoundsColumbia River
Reservoir
CreatesRock Island Pool
Total capacity131,000 acre⋅ft (0.162 km3)
Power Station
Turbines19 [1]
Installed capacity623.7 MW [2]
Annual generation2,600 GWh

Rock Island Dam is a hydroelectric dam on the Columbia River, in the U.S. state of Washington. Chelan County Public Utility District's Rock Island Dam and Hydro Project was the first dam to span the Columbia, having been built from 1929 to 1933. It is located near the geographical center of Washington, about 12 miles (19 km) downstream from the city of Wenatchee. By river, the dam is 235 miles (378 km) south of the Canada–US border and 453 miles (729 km) above the mouth of the river at Astoria, Oregon. The dam's reservoir is called Rock Island Pool.[3]

  1. ^ "Electricity - U.S. Energy Information Administration (EIA)".
  2. ^ "Electricity - U.S. Energy Information Administration (EIA)".
  3. ^ http://pubs.usgs.gov/wdr/2005/wdr-wa-05-1/pdf/wa00103ADR2005_Figure56.pdf [bare URL PDF]

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