US Army Corps of Engineers

McNary Dam & Lake Wallula

November 2025

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 11489 479 120 95.20 97.30 91.10 1.50 337.80 337.87 266.20 71.67
2 10593 441 125 92.40 86.60 80.50 1.40 338.06 337.88 265.84 72.04
3 12382 516 120 96.20 104.20 98.00 1.50 337.71 337.97 265.80 72.17
4 13060 544 120 121.80 108.80 102.50 1.60 338.40 338.42 265.77 72.65
5 15260 636 120 125.00 126.30 119.90 1.70 338.48 338.78 266.04 72.74
6 12369 515 120 104.90 102.60 96.30 1.60 338.45 338.74 265.92 72.82
7 11776 491 120 100.90 98.00 91.60 1.60 338.65 338.73 266.01 72.72
8 12158 507 120 101.70 100.60 94.20 1.70 338.81 338.94 265.89 73.05
9 13602 567 120 111.20 113.00 106.60 1.60 338.75 338.81 266.25 72.56
10 13578 566 120 107.40 113.10 106.80 1.60 338.36 338.62 266.28 72.34
11 12499 521 120 107.10 104.00 97.70 1.60 338.54 338.59 266.01 72.58
12 12452 519 120 107.50 103.10 96.80 1.60 338.72 338.70 265.77 72.93
13 13082 545 120 106.30 107.60 101.30 1.70 338.63 338.83 265.49 73.34
14 12581 524 120 94.10 103.30 97.00 1.60 338.33 338.51 265.12 73.39
15 11720 488 120 96.30 95.80 89.50 1.60 338.14 338.31 264.41 73.90
16 12825 534 120 106.00 102.20 97.50 0.00 338.42 338.41 264.00 74.41
17 15048 627 120 108.90 119.40 114.70 0.00 337.85 338.48 264.34 74.14
18 127.30 120.40 115.70 0.00 338.13 338.42 264.68 73.74
19 121.70 118.90 114.20 0.00 338.31 338.47 264.68 73.79
20 129.30 127.30 122.60 0.00 338.51 338.69 265.13 73.56
21 130.20 127.90 123.20 0.00 338.61 338.78 265.52 73.26
22 124.00 126.00 121.30 0.00 338.42 338.75 265.94 72.81
23 107.40 111.80 107.10 0.00 338.22 338.52 265.82 72.70
24 104.20 106.80 102.10 0.00 338.07 338.14 265.71 72.43
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1
TOT216476  2045        
AVG 12734 531 120 109.46 109.38 103.67 1.00 338.35 338.51 265.53 72.99
MAX 15260   130.20 127.90 123.20 1.70 338.81 338.94 266.28 74.41
MIN 10593   92.40 86.60 80.50 0.00 337.71 337.87 264.00 71.67
BUILDING STRONG®