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 26.10 26.60 12.60 13.30 537.96 537.89 437.92 99.97
15 22.70 22.30 12.50 9.00 538.07 537.94 438.05 99.89
16 22.40 22.40 12.60 9.00 538.07 537.96 437.94 100.02
17 22.70 22.30 12.60 9.00 538.20 537.97 438.03 99.94
18 23.40 23.20 12.50 10.00 538.23 538.04 437.93 100.11
19 25.70 24.30 12.50 11.10 538.63 538.06 438.12 99.94
20 28.10 25.80 12.50 12.50 539.34 538.54 438.28 100.26
21
22
23
24
25
26
27
28
29
30
31
TOT 28768  260        
AVG 2213 92 20 25.52 25.34 12.50 12.04 538.17 538.01 437.99 100.02
MAX 2288   30.30 30.40 12.90 16.70 539.34 538.54 438.28 100.26
MIN 2168   22.40 22.30 12.20 9.00 537.73 537.84 437.85 99.80
BUILDING STRONG®