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Columbia Basin Project Water Data

Columbia Basin Project  -  Main Page

Project Water Supply

Normal

7.83 in  

Maximum  -  1983

14.03 in  

Minimum   -  1976

3.61 in  

Quincy, Washington 1961-1990

  

      Temperature

Mean Annual

49.8 °F  

Daily Maximum  -  07/16/1941

109 °F  

Daily Minimum   -  01/31/1950

-29 °F  

Quincy, Washington 1941-1996

  

Growing Season

212 days  

Elevation of irrigable area:

  

   Northern Part

1,500 ft  

   Southern Part

500 ft  

      Columbia River

Drainage area above Grand Coulee Dam

74,100 mi2  

Annual discharge:

  

   Maximum  -  1972

101,288,880 acre-ft  

   Minimum   -  1944

51,566,526 acre-ft  

   Average    -  1930-1996

78,250,374 acre-ft  

                             Streamflows:  Columbia River at Grand Coulee, Washington (USGS)
 

Project Water Quality

 
 

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