US Army Corps of Engineers

McNary Dam & Lake Wallula

September 2020

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 12808 534 96 98.90 104.90 100.20 0.00 339.05 339.19 264.74 74.45
2 13360 557 96 119.40 108.90 104.20 0.00 339.60 339.36 264.64 74.72
3 12940 539 96 84.60 110.00 101.10 4.20 338.23 338.90 264.64 74.26
4 11748 489 96 103.80 96.80 92.10 0.00 338.62 338.47 264.48 73.99
5 11031 460 96 93.20 90.10 85.40 0.00 338.80 338.88 264.35 74.53
6 13673 570 96 106.10 112.60 107.90 0.00 338.43 338.60 264.82 73.78
7 12035 501 96 104.00 98.30 93.60 0.00 338.74 338.68 264.25 74.43
8 13568 565 96 96.40 112.00 107.20 0.20 337.98 338.33 264.53 73.80
9 11738 489 96 104.80 97.20 92.10 0.40 338.30 338.33 264.27 74.06
10 12984 541 96 111.70 105.70 101.00 0.00 338.64 338.57 264.15 74.42
11 12883 537 96 112.20 104.60 99.90 0.00 339.05 338.84 264.21 74.63
12 14278 595 96 122.80 115.90 111.20 0.00 339.41 339.28 264.78 74.50
13 14257 594 96 110.90 116.00 111.30 0.00 339.11 339.45 265.05 74.40
14 12532 522 96 106.50 102.10 97.40 0.00 339.37 339.33 264.64 74.69
15 90.90 97.40 90.90 1.80 339.00 339.26 264.30 74.96
16 89.50 94.60 89.90 0.00 338.72 339.00 264.20 74.80
17 114.90 108.70 102.40 1.70 339.10 339.02 264.69 74.33
18 126.40 121.30 116.60 0.00 339.34 339.22 265.14 74.08
19 83.70 88.20 81.80 1.60 339.10 339.21 264.63 74.58
20 72.50 81.80 77.10 0.00 338.63 338.83 264.53 74.30
21 81.90 75.20 68.90 1.60 338.95 338.77 264.25 74.52
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TOT179834  1344        
AVG 12845 535 96 101.67 102.01 96.77 0.55 338.87 338.93 264.54 74.39
MAX 14278   126.40 121.30 116.60 4.20 339.60 339.45 265.14 74.96
MIN 11031   72.50 75.20 68.90 0.00 337.98 338.33 264.15 73.78