US Army Corps of Engineers

Lower Monumental Dam & Lake

August 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 2600 108 12 25.30 23.50 14.70 8.00 538.21 538.02 438.38 99.64
2 3995 166 12 29.40 31.50 22.60 8.10 537.58 538.17 438.61 99.56
3 3147 131 12 29.10 26.80 17.90 8.10 538.26 537.74 438.45 99.29
4 2734 114 12 23.50 24.40 15.50 8.00 538.01 537.73 438.54 99.19
5 2733 114 12 23.80 24.20 15.50 8.00 537.89 537.93 438.45 99.48
6 3331 139 13 27.80 27.70 18.90 7.90 537.92 537.94 438.45 99.49
7 2968 124 12 25.10 25.60 16.80 8.00 537.77 538.03 438.43 99.60
8 2957 123 12 25.80 25.60 16.80 8.10 537.84 537.89 438.46 99.43
9 3400 142 13 28.00 28.10 19.20 8.10 537.80 538.04 438.38 99.66
10 2550 106 13 22.90 23.30 14.50 8.00 537.70 537.84 438.46 99.38
11 3673 153 13 28.50 29.60 20.90 8.00 537.38 537.69 438.52 99.17
12 2841 118 13 24.80 24.90 16.20 8.00 537.34 537.45 438.33 99.12
13 2638 110 13 25.30 23.80 15.00 8.00 537.78 537.61 438.28 99.33
14 2866 119 13 25.00 25.10 16.30 8.00 537.74 537.90 438.50 99.40
15 3175 132 13 26.90 27.00 18.10 8.20 537.72 537.91 438.67 99.24
16 3081 128 13 28.30 26.40 17.60 7.90 538.29 538.03 439.28 98.75
17 3361 140 13 25.00 28.10 19.20 8.10 537.39 537.89 439.30 98.59
18 699 29 13 22.60 20.80 8.40 11.60 537.91 537.57 439.22 98.35
19 12 1 12 22.10 21.20 6.10 14.50 538.18 538.06 438.92 99.14
20 12 1 12 22.40 23.00 6.20 16.00 538.02 538.05 438.97 99.08
21 13 1 13 22.40 23.00 6.20 16.00 537.84 537.90 439.03 98.87
22 13 1 13 22.70 22.90 6.30 16.00 537.77 537.77 438.84 98.93
23 13 1 13 24.80 23.00 6.30 16.00 538.30 537.82 438.65 99.17
24 13 1 13 23.30 21.20 6.20 14.10 538.92 538.62 438.63 99.99
25 13 1 13 23.00 21.90 6.20 15.00 539.26 539.13 438.39 100.74
26 13 1 13 22.60 22.50 6.20 15.30 539.28 539.05 438.42 100.63
27 14 1 13 23.40 25.30 6.20 18.30 538.71 539.19 438.33 100.86
28 1666 69 13 24.00 23.60 12.40 10.50 538.83 538.95 438.61 100.34
29 2450 102 13 22.70 22.80 13.70 8.40 538.78 538.92 438.35 100.57
30 2339 97 13 22.30 22.20 13.20 8.30 538.80 538.78 438.60 100.18
31 2597 108 15 23.10 23.70 14.70 8.30 538.64 538.77 438.82 99.95
TOT 61916  398        
AVG 1997 83 13 24.71 24.60 13.35 10.48 538.12 538.14 438.62 99.52
MAX 3995   29.40 31.50 22.60 18.30 539.28 539.19 439.30 100.86
MIN 12   22.10 20.80 6.10 7.90 537.34 537.45 438.28 98.35
BUILDING STRONG®