US Army Corps of Engineers

McNary Dam & Lake Wallula

August 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 6522 272 96 135.20 120.50 50.60 65.10 338.75 338.22 263.92 74.30
2 7146 298 96 146.10 141.50 55.70 81.10 338.99 338.98 264.56 74.42
3 7434 310 96 151.90 145.70 57.50 83.50 339.33 339.45 264.74 74.71
4 7359 307 96 139.70 144.10 56.90 82.50 339.08 339.37 264.65 74.72
5 7282 303 96 140.60 142.90 56.50 81.70 338.96 339.24 264.79 74.45
6 6577 274 96 124.60 130.70 51.30 74.70 338.63 338.76 264.76 74.00
7 6495 271 96 115.30 114.40 50.70 59.00 338.67 338.53 264.57 73.96
8 6521 272 96 131.20 126.40 50.90 70.70 338.94 338.73 264.85 73.88
9 6781 283 96 147.00 133.30 52.40 76.20 339.70 339.39 264.85 74.54
10 7206 300 96 129.40 140.50 55.60 80.20 339.08 339.52 264.81 74.71
11 7896 329 96 137.30 154.80 61.80 88.30 338.13 338.88 264.87 74.01
12 7491 312 96 150.70 147.80 58.70 84.40 338.30 338.31 264.57 73.74
13 8810 367 96 175.10 173.20 69.50 99.00 338.41 338.66 265.06 73.60
14 8649 360 96 171.30 170.30 68.00 97.60 338.44 338.80 265.12 73.68
15 11191 466 96 123.50 111.90 87.00 20.30 339.07 338.93 264.37 74.56
16 12993 541 96 125.10 127.00 102.30 20.00 338.98 339.07 264.94 74.13
17 12964 540 96 121.90 128.20 103.60 19.90 338.63 338.85 265.56 73.29
18 11538 481 96 109.20 116.30 91.70 19.90 338.26 338.50 265.03 73.47
19 13896 579 96 145.50 134.80 110.20 19.90 338.80 338.56 265.20 73.36
20 15212 634 96 140.00 145.60 121.00 19.90 338.52 338.75 265.57 73.18
21 13523 563 96 115.20 132.50 107.80 19.90 337.60 338.25 265.10 73.15
22 11284 470 96 114.70 114.90 90.40 19.80 337.61 337.73 264.82 72.91
23 13290 554 96 141.10 131.80 107.20 19.90 338.09 337.94 265.29 72.65
24 13346 556 96 138.20 131.50 106.80 19.90 338.45 338.28 265.10 73.18
25 13479 562 96 138.60 131.70 107.00 19.90 338.72 338.66 264.95 73.71
26 13484 562 96 123.20 131.70 107.10 19.90 338.27 338.55 264.88 73.67
27 13182 549 96 132.10 130.30 105.70 19.90 338.38 338.14 265.12 73.02
28 13354 556 96 147.90 134.60 106.10 23.80 339.09 338.83 265.15 73.68
29 13201 550 96 126.30 129.10 104.50 19.90 338.94 339.00 265.08 73.92
30 12491 520 96 121.90 123.40 98.80 19.90 338.89 339.01 265.14 73.87
31 7702 321 96 90.00 84.40 59.80 20.00 339.11 338.98 264.26 74.72
TOT318298  2976        
AVG 10268 428 96 133.86 133.09 81.07 47.31 338.67 338.74 264.89 73.84
MAX 15212   175.10 173.20 121.00 99.00 339.70 339.52 265.57 74.72
MIN 6495   90.00 84.40 50.60 19.80 337.60 337.73 263.92 72.65