US Army Corps of Engineers

Lower Monumental Dam & Lake

August 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 2177 91 15 25.90 26.10 12.30 13.00 538.24 537.87 438.07 99.80
2 2225 93 14 27.20 28.00 12.50 14.70 538.00 537.98 437.88 100.10
3 2206 92 19 23.90 23.80 12.50 10.70 537.98 538.01 438.02 99.99
4 2191 91 23 24.00 24.70 12.40 11.40 537.78 537.89 438.01 99.88
5 2232 93 22 27.70 27.40 12.60 14.00 537.88 537.84 438.01 99.83
6 2200 92 23 29.60 29.00 12.40 15.70 538.09 538.19 437.98 100.21
7 2288 95 23 30.30 30.40 12.90 16.70 538.05 538.10 438.04 100.06
8 2227 93 23 27.40 27.10 12.60 13.70 538.14 538.07 438.02 100.05
9 2219 92 22 25.00 26.40 12.50 13.00 537.73 537.92 437.96 99.96
10 2168 90 22 25.00 23.50 12.20 10.40 538.15 537.90 437.85 100.05
11 2185 91 22 23.50 23.00 12.30 9.80 538.32 538.17 437.91 100.26
12 2220 92 17 25.40 25.00 12.50 11.90 538.42 538.04 437.90 100.14
13 2232 93 15 24.40 25.50 12.60 11.90 538.11 537.92 437.90 100.02
14 2231 93 15 26.10 26.60 12.60 13.30 537.96 537.89 437.92 99.97
15 2216 92 15 22.70 22.30 12.50 9.00 538.07 537.94 438.05 99.89
16 2236 93 14 22.40 22.40 12.60 9.00 538.07 537.96 437.94 100.02
17 2226 93 14 22.70 22.30 12.60 9.00 538.20 537.97 438.03 99.94
18 2220 93 14 23.40 23.20 12.50 10.00 538.23 538.04 437.93 100.11
19 2207 92 14 25.70 24.30 12.50 11.10 538.63 538.06 438.12 99.94
20 2228 93 14 28.10 25.80 12.50 12.50 539.34 538.54 438.28 100.26
21 23.70 24.80 12.60 11.40 539.01 538.92 438.57 100.35
22 23.90 22.80 12.50 9.60 539.34 539.16 438.58 100.58
23 22.90 26.20 12.50 12.90 538.37 538.63 438.60 100.03
24 23.70 22.50 12.60 9.20 538.73 538.21 438.64 99.57
25 25.70 24.70 12.70 11.10 539.01 538.51 438.59 99.92
26 23.20 25.00 13.40 11.00 538.46 538.78 438.70 100.08
27 22.70 22.50 12.60 9.10 538.55 538.29 438.67 99.62
28
29
30
31
TOT 44333  361        
AVG 2217 92 18 25.04 25.01 12.56 11.67 538.33 538.18 438.15 100.02
MAX 2288   30.30 30.40 13.40 16.70 539.34 539.16 438.70 100.58
MIN 2168   22.40 22.30 12.20 9.00 537.73 537.84 437.85 99.57
BUILDING STRONG®