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 2240 93 15 23.70 24.80 12.60 11.40 539.01 538.92 438.57 100.35
22 2230 93 14 23.90 22.80 12.50 9.60 539.34 539.16 438.58 100.58
23 2216 92 14 22.90 26.20 12.50 12.90 538.37 538.63 438.60 100.03
24 2222 93 14 23.70 22.50 12.60 9.20 538.73 538.21 438.64 99.57
25 2245 94 14 25.70 24.70 12.70 11.10 539.01 538.51 438.59 99.92
26 2361 98 15 23.20 25.00 13.40 11.00 538.46 538.78 438.70 100.08
27 2231 93 14 22.70 22.50 12.60 9.10 538.55 538.29 438.67 99.62
28 2196 91 13 20.20 20.10 12.40 6.90 538.57 538.53 438.52 100.01
29 2175 91 13 21.50 20.00 12.30 7.00 539.03 538.68 438.57 100.11
30 2175 91 13 22.50 23.40 12.20 10.50 538.74 539.01 438.45 100.56
31 2189 91 19 23.10 23.20 12.40 10.10 538.71 538.44 438.22 100.22
TOT 68813  519        
AVG 2220 92 17 24.63 24.58 12.53 11.28 538.38 538.24 438.19 100.05
MAX 2361   30.30 30.40 13.40 16.70 539.34 539.16 438.70 100.58
MIN 2168   20.20 20.00 12.20 6.90 537.73 537.84 437.85 99.57
BUILDING STRONG®