US Army Corps of Engineers

Lower Monumental Dam & Lake

February 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 4311 180 18 24.10 24.50 24.20 0.00 538.88 539.07 439.08 99.99
2 4903 204 19 28.70 28.00 27.70 0.00 539.09 538.79 439.41 99.38
3 4576 191 19 27.80 26.10 25.80 0.00 539.13 538.92 439.23 99.69
4 4513 188 19 27.10 25.80 25.40 0.00 538.95 538.91 439.29 99.62
5 4531 189 19 26.60 25.70 25.50 0.00 539.23 538.97 439.11 99.86
6 4409 184 19 24.60 25.70 25.00 0.30 538.91 539.09 439.06 100.03
7 5022 209 19 30.50 28.60 28.30 0.00 539.49 539.15 439.01 100.14
8 4913 205 19 26.60 28.00 27.70 0.00 539.07 539.37 439.08 100.29
9 4929 205 19 28.60 28.10 27.70 0.00 539.23 539.13 439.21 99.92
10 4613 192 19 25.70 26.30 26.00 0.00 539.05 539.18 438.74 100.44
11 5503 229 19 31.60 31.70 31.20 0.00 539.01 538.63 439.19 99.44
12 6090 254 20 35.60 34.70 34.30 0.00 539.28 539.20 439.37 99.83
13 4591 191 19 25.20 26.10 25.80 0.00 539.03 539.11 439.15 99.96
14 4372 182 19 25.90 24.90 24.60 0.00 539.34 539.07 439.12 99.95
15 5024 209 19 29.10 28.40 28.10 0.00 539.53 539.32 439.34 99.98
16 5899 246 19 32.40 33.80 33.50 0.00 539.13 538.77 439.36 99.41
17 6600 275 19 34.10 37.50 37.20 0.00 538.13 538.80 439.03 99.77
18 3399 142 18 21.40 19.90 19.20 0.00 538.57 538.45 438.71 99.74
19 5790 241 19 34.70 33.00 32.70 0.00 539.08 538.93 439.08 99.85
20 5561 232 19 32.00 31.70 31.30 0.00 539.14 539.03 439.34 99.69
21 26.60 26.90 26.70 0.00 539.06 539.11 439.49 99.62
22 26.20 28.30 28.10 0.00 538.44 538.94 439.28 99.66
23 31.80 29.70 29.50 0.00 539.07 538.66 438.90 99.76
24 30.70 30.00 29.80 0.00 539.27 538.98 438.68 100.30
25 37.10 37.70 37.50 0.00 539.09 539.06 439.35 99.71
26 35.70 35.20 34.90 0.00 539.22 539.05 439.17 99.88
27
28
TOT 99548  378        
AVG 4977 207 19 29.25 29.09 28.76 0.01 539.05 538.99 439.15 99.84
MAX 6600   37.10 37.70 37.50 0.30 539.53 539.37 439.49 100.44
MIN 3399   21.40 19.90 19.20 0.00 538.13 538.45 438.68 99.38
BUILDING STRONG®