US Army Corps of Engineers

Priest Rapids Dam & Reservoir

April 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 16578 691 45 145.50 149.40 125.70 22.60 486.10 486.89 412.84 74.05
2 12326 514 45 119.30 119.60 91.90 26.90 486.01 485.10 410.38 74.72
3 14846 619 44 135.90 138.40 113.70 23.70 485.30 485.35 411.92 73.43
4 16576 691 45 132.60 128.40 127.40 0.00 486.48 484.79 411.51 73.28
5 16626 693 45 122.50 127.80 126.90 0.00 485.00 485.08 411.44 73.64
6 15874 661 46 124.40 118.00 117.10 0.00 486.77 486.35 410.68 75.67
7 99.90 105.60 104.70 0.10 485.20 484.79 409.62 75.17
8 119.90 116.90 99.10 16.90 486.04 485.50 410.32 75.18
9 120.00 120.70 95.20 24.60 485.84 485.69 410.48 75.21
10 129.80 130.80 104.50 25.50 485.56 486.01 411.32 74.69
11 123.60 127.60 102.60 24.10 484.44 485.47 411.09 74.38
12 143.00 137.20 111.50 24.90 486.07 485.77 411.84 73.93
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TOT 92826  270        
AVG 15471 645 45 126.37 126.70 110.03 15.77 485.73 485.57 411.12 74.45
MAX 16626   145.50 149.40 127.40 26.90 486.77 486.89 412.84 75.67
MIN 12326   99.90 105.60 91.90 0.00 484.44 484.79 409.62 73.28