US Army Corps of Engineers

Ice Harbor Dam

May 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 2259 94 54 70.00 69.80 13.00 56.20 437.72 437.70 342.17 95.53
2 2239 93 53 70.60 68.70 12.80 55.10 438.19 437.87 342.14 95.73
3 2237 93 54 62.40 62.60 12.70 49.20 438.13 438.09 341.59 96.50
4 2238 93 55 69.00 69.90 12.80 56.40 437.91 438.00 342.17 95.83
5 2259 94 54 75.50 75.70 13.00 61.90 437.88 437.98 342.70 95.28
6 2265 94 55 77.40 75.90 13.00 62.20 438.25 438.10 342.74 95.36
7 2266 94 54 80.70 81.70 13.10 67.90 438.04 438.16 343.38 94.78
8 2247 94 54 86.70 85.70 13.00 72.00 438.26 438.03 343.70 94.33
9 2250 94 54 90.40 91.80 13.10 78.10 437.92 438.06 344.13 93.93
10 2248 94 54 87.10 87.10 13.10 73.40 437.91 437.92 343.87 94.05
11 2253 94 54 88.10 88.30 13.10 74.60 437.87 437.94 343.90 94.04
12 2250 94 54 89.50 88.80 13.10 75.00 438.01 437.90 343.94 93.96
13 2243 93 54 93.90 93.40 13.10 79.70 438.12 437.99 344.34 93.65
14 2241 93 54 101.70 102.60 13.20 88.80 437.91 438.04 345.00 93.04
15 2262 94 55 98.20 96.70 13.20 82.90 438.28 438.07 344.49 93.58
16 2339 97 54 87.50 88.00 13.50 73.80 438.14 438.15 343.78 94.37
17 2342 98 53 84.10 84.60 13.60 70.40 438.03 438.06 343.49 94.57
18 2340 97 54 77.60 77.50 13.50 63.30 438.05 438.08 342.87 95.21
19 2329 97 54 68.00 69.00 13.40 54.90 437.81 437.93 342.30 95.63
20 2367 99 54 60.10 59.90 13.50 45.70 437.86 437.71 341.62 96.09
21 2251 94 54 59.80 60.10 12.80 46.40 437.80 438.05 341.64 96.41
22 2256 94 55 53.60 53.80 12.80 40.40 437.75 437.62 341.37 96.25
23 2264 94 55 54.20 53.60 12.80 40.00 437.89 437.91 341.51 96.40
24 2261 94 54 53.80 53.60 12.80 40.00 437.94 437.85 341.52 96.33
25 2258 94 54 57.20 55.70 12.80 42.20 438.29 438.12 341.60 96.52
26 2255 94 54 65.20 64.80 12.80 51.30 438.40 438.28 342.21 96.07
27 2255 94 54 64.90 66.00 438.14 437.93 342.40 95.53
28 2255 94 53 72.90 73.30 438.02 438.10 342.79 95.31
29 2262 94 52 77.00 76.50 438.15 437.99 342.90 95.09
30 77.50 77.20 13.00 63.50 438.25 438.24 342.96 95.28
31 69.50 71.40 12.90 57.80 437.78 438.04 342.43 95.61
TOT 65790  1565        
AVG 2269 95 54 74.97 74.96 13.05 61.54 438.02 438.00 342.83 95.17
MAX 2367   101.70 102.60 13.60 88.80 438.40 438.28 345.00 96.52
MIN 2237   53.60 53.60 12.70 40.00 437.72 437.62 341.37 93.04
BUILDING STRONG®