US Army Corps of Engineers

Lower Monumental Dam & Lake

July 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 4471 186 14 43.30 43.40 25.40 17.30 537.86 537.83 438.27 99.56
2 4227 176 14 42.00 41.80 23.90 17.30 537.93 537.97 438.12 99.85
3 3702 154 14 38.30 38.40 20.80 16.90 537.92 537.94 437.94 100.00
4 3049 127 14 35.00 34.90 17.20 17.00 537.93 538.01 437.90 100.11
5 3031 126 14 35.20 34.90 17.10 17.20 537.98 537.91 437.93 99.98
6 3046 127 17 34.30 35.00 17.30 17.00 537.79 537.72 437.98 99.74
7 3311 138 18 35.60 36.30 18.70 16.90 537.61 537.82 437.97 99.85
8 3119 130 18 36.10 35.20 17.70 16.90 537.85 537.78 438.05 99.73
9 2619 109 17 32.80 32.40 14.80 16.90 537.98 537.91 437.91 100.00
10 2754 115 18 32.80 33.10 15.50 16.90 537.89 537.97 437.87 100.10
11 2235 93 18 29.50 30.20 12.60 16.90 537.70 537.82 437.77 100.05
12 2151 90 17 25.50 25.80 12.20 13.00 537.61 537.45 437.67 99.78
13 2154 90 18 27.70 25.90 12.20 13.10 538.13 537.71 437.83 99.88
14 2159 90 18 27.30 27.60 12.20 14.70 538.03 537.83 437.93 99.90
15 2845 119 18 33.70 33.90 16.10 17.10 537.95 537.99 437.99 100.00
16 3269 136 17 34.50 36.50 18.50 17.10 537.36 537.78 438.14 99.64
17 2911 121 16 36.30 34.20 16.50 17.00 537.99 537.79 438.07 99.72
18 2420 101 16 30.90 31.40 13.70 17.10 537.82 537.84 437.87 99.97
19 2176 91 16 29.60 30.00 12.30 17.00 537.71 537.50 437.66 99.84
20 2215 92 17 27.60 27.10 12.50 13.90 537.85 537.70 437.60 100.10
21 2259 94 18 28.80 28.10 12.70 14.60 538.05 537.85 437.84 100.01
22 2224 93 15 29.80 29.40 12.60 16.10 538.16 537.83 437.88 99.95
23 2177 91 14 29.10 29.00 12.30 16.00 538.19 537.74 437.86 99.88
24 2156 90 14 27.70 28.90 12.20 15.90 537.83 537.74 437.89 99.85
25 2141 89 14 26.70 26.80 12.20 13.90 537.81 537.54 438.00 99.54
26 2168 90 14 27.60 27.00 12.30 13.90 537.99 537.64 437.95 99.69
27 2149 90 14 24.90 26.60 12.20 13.60 537.48 537.45 437.93 99.52
28 2150 90 15 25.00 24.30 12.20 11.40 537.67 537.40 438.07 99.33
29 2162 90 15 27.00 25.20 12.40 12.00 538.20 537.94 438.06 99.88
30 2047 85 14 26.10 25.70 12.00 13.10 538.32 537.94 437.97 99.97
31 25.90 26.10 12.20 13.00 538.27 537.86 438.01 99.85
TOT 79496  476        
AVG 2650 110 16 31.18 31.13 14.92 15.51 537.90 537.78 437.93 99.85
MAX 4471   43.30 43.40 25.40 17.30 538.32 538.01 438.27 100.11
MIN 2047   24.90 24.30 12.00 11.40 537.36 537.40 437.60 99.33
BUILDING STRONG®