US Army Corps of Engineers

Priest Rapids Dam & Reservoir

September 2021

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 11853 494 44 97.50 94.40 85.60 8.10 487.66 487.14 407.31 79.83
2 13826 576 44 100.50 106.20 102.20 3.10 486.14 486.21 408.56 77.65
3 10484 437 44 78.80 76.20 73.50 2.00 486.85 486.31 405.84 80.47
4 9158 382 43 66.40 65.80 63.10 2.10 487.00 486.87 404.76 82.11
5 6902 288 45 48.80 49.00 46.60 2.10 486.93 486.65 402.82 83.83
6 8503 354 44 61.90 61.60 59.00 2.10 487.00 486.67 404.20 82.47
7 9797 408 45 71.00 72.20 69.60 2.10 486.66 486.54 405.18 81.36
8 10751 448 46 77.20 80.30 77.60 2.00 485.82 485.63 406.13 79.50
9 9113 380 46 65.80 68.00 65.60 1.90 485.20 484.75 404.86 79.89
10 5806 242 45 47.40 42.20 39.30 2.50 486.66 486.05 401.91 84.14
11 7569 315 43 57.30 55.60 52.30 2.80 487.11 486.58 403.37 83.21
12 6667 278 43 44.30 48.50 45.20 2.70 485.98 486.55 402.54 84.01
13 8969 374 42 66.20 65.50 63.20 1.70 486.16 485.95 404.50 81.45
14 7452 310 43 54.00 53.50 51.40 1.50 486.30 485.86 403.26 82.60
15 7878 328 41 55.20 55.80 54.50 0.70 486.12 486.14 403.50 82.64
16 8478 353 41 62.90 60.80 58.80 1.30 486.70 486.18 404.05 82.13
17 8947 373 40 66.90 65.60 62.40 2.50 487.06 486.29 404.61 81.68
18 7432 310 41 53.70 53.90 50.60 2.70 487.02 486.68 403.31 83.37
19 6761 282 40 48.80 48.80 45.70 2.60 487.02 486.45 402.67 83.78
20 55.20 54.90 52.50 1.80 487.09 486.52 403.40 83.12
21 60.00 60.40 57.80 2.00 486.98 486.67 403.92 82.75
22 60.80 61.80 58.70 2.40 486.71 487.27 404.06 83.21
23 79.60 79.90 76.90 2.20 486.61 487.17 405.90 81.27
24 84.60 84.20 80.70 2.60 486.73 486.30 406.49 79.81
25 66.30 66.80 63.40 2.70 486.59 486.52 404.65 81.87
26 64.50 64.90 61.60 2.60 486.48 486.47 404.41 82.06
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30
TOT166346  820        
AVG 8755 365 43 65.22 65.26 62.22 2.42 486.64 486.40 404.47 81.93
MAX 13826   100.50 106.20 102.20 8.10 487.66 487.27 408.56 84.14
MIN 5806   44.30 42.20 39.30 0.70 485.20 484.75 401.91 77.65