US Army Corps of Engineers

Lower Monumental Dam & Lake

January 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 6525 272 19 37.60 36.80 36.50 0.00 539.24 539.23 439.24 99.99
2 6550 273 19 37.70 36.80 36.60 0.00 539.51 539.35 439.18 100.17
3 8233 343 19 43.70 46.40 46.20 0.00 538.68 539.15 439.21 99.94
4 8464 353 20 46.10 48.00 47.70 0.00 538.12 538.66 439.06 99.60
5 8630 360 21 49.40 49.80 49.00 0.60 537.98 537.97 438.81 99.16
6 9141 381 18 52.10 52.00 51.80 0.00 537.98 538.14 439.14 99.00
7 7711 321 17 44.80 44.00 43.70 0.00 538.25 538.06 438.90 99.16
8 7945 331 17 47.90 45.20 45.00 0.00 539.05 538.44 439.26 99.18
9 7293 304 17 41.50 41.10 40.90 0.00 539.16 539.16 439.28 99.88
10 7657 319 17 43.30 43.40 43.30 0.00 539.13 539.18 439.38 99.80
11 7424 309 17 41.50 42.00 41.70 0.00 538.99 539.11 439.32 99.79
12 7419 309 18 42.70 42.20 41.90 0.00 539.14 538.97 439.53 99.44
13 7293 304 18 42.20 41.70 41.50 0.00 539.32 539.05 439.47 99.58
14 7368 307 19 41.90 41.80 41.60 0.00 539.33 539.15 439.50 99.65
15 7308 305 20 41.20 41.70 41.40 0.00 539.20 539.23 439.38 99.85
16 7583 316 19 42.20 42.70 42.50 0.00 539.06 539.29 439.24 100.05
17 7325 305 19 40.20 41.70 41.50 0.00 538.60 538.85 439.54 99.31
18 6765 282 19 38.60 38.40 38.20 0.00 538.67 538.62 439.15 99.47
19 7076 295 19 40.60 40.20 40.10 0.00 538.77 538.90 439.49 99.41
20 6800 283 19 37.80 38.80 38.60 0.00 538.47 538.49 439.23 99.26
21 36.80 37.50 37.20 0.10 538.27 538.29 438.82 99.47
22 36.30 34.80 34.50 0.00 538.72 538.56 438.72 99.84
23 34.40 36.70 36.40 0.00 538.05 538.48 438.86 99.62
24 33.00 33.00 32.70 0.00 538.03 538.01 438.87 99.14
25 31.50 32.30 32.00 0.00 537.79 537.84 438.87 98.97
26 27.00 25.20 24.90 0.00 538.34 537.98 438.67 99.31
27 27.70 27.70 27.40 0.00 538.34 538.56 438.86 99.70
28
29
30
31
TOT150510  374        
AVG 7525 314 19 39.99 40.07 39.81 0.03 538.67 538.69 439.15 99.55
MAX 9141   52.10 52.00 51.80 0.60 539.51 539.35 439.54 100.17
MIN 6525   27.00 25.20 24.90 0.00 537.79 537.84 438.67 98.97
BUILDING STRONG®