US Army Corps of Engineers

Ice Harbor Dam

September 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 2367 99 55 20.00 20.80 13.10 7.00 438.32 438.18 338.51 99.67
2 2359 98 55 17.30 18.00 13.10 4.20 438.14 438.26 338.98 99.28
3 2878 120 55 21.50 18.10 15.90 1.40 438.93 438.62 339.31 99.31
4 3056 127 54 21.90 16.80 439.12
5 28.40 27.70 22.30 4.70 439.06 439.15 339.79 99.36
6 24.90 25.30 15.50 9.20 438.97 439.00 339.16 99.84
7 23.50 24.50 19.20 4.70 438.74 438.84 339.47 99.37
8 21.40 22.20 17.20 4.40 438.55 438.69 339.28 99.41
9 23.40 22.10 16.90 4.70 438.85 439.05 339.30 99.75
10 26.80 26.10 20.60 4.70 439.03 438.96 339.53 99.43
11 25.20 25.90 16.30 9.10 438.86 438.95 339.07 99.88
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TOT 10660  219        
AVG 2665 111 55 23.12 23.07 16.99 5.41 438.75 438.80 339.24 99.53
MAX 3056   28.40 27.70 22.30 9.20 439.06 439.15 339.79 99.88
MIN 2359   17.30 18.00 13.10 1.40 438.14 438.18 338.51 99.28