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 34.50 36.50 18.50 17.10 537.36 537.78 438.14 99.64
17 36.30 34.20 16.50 17.00 537.99 537.79 438.07 99.72
18 30.90 31.40 13.70 17.10 537.82 537.84 437.87 99.97
19 29.60 30.00 12.30 17.00 537.71 537.50 437.66 99.84
20 27.60 27.10 12.50 13.90 537.85 537.70 437.60 100.10
21 28.80 28.10 12.70 14.60 538.05 537.85 437.84 100.01
22 29.80 29.40 12.60 16.10 538.16 537.83 437.88 99.95
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TOT 44872  246        
AVG 2991 125 16 33.03 32.98 16.02 16.27 537.87 537.82 437.92 99.90
MAX 4471   43.30 43.40 25.40 17.30 538.16 538.01 438.27 100.11
MIN 2151   25.50 25.80 12.20 13.00 537.36 537.45 437.60 99.56
BUILDING STRONG®