US Army Corps of Engineers

The Dalles 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 19747 823 48 228.60 233.60 136.80 91.00 157.24 158.35 78.74 79.61
2 17167 715 48 214.90 217.40 118.60 93.00 156.76 158.08 78.48 79.60
3 18539 772 48 228.20 221.40 128.60 87.00 158.03 158.32 79.18 79.14
4 18668 778 48 223.70 223.10 128.80 88.50 158.18 158.72 79.00 79.72
5 20250 844 48 241.30 236.70 141.90 89.00 158.99 158.35 79.69 78.66
6 16550 690 48 211.60 214.10 113.80 94.50 158.53 158.70 78.85 79.85
7 213.50 210.60 118.80 86.00 159.12 159.40 78.79 80.61
8 215.00 219.30 129.40 84.00 158.31 158.96 79.35 79.61
9 222.10 223.20 129.40 88.00 158.09 158.66 79.19 79.47
10 236.80 234.50 139.70 89.00 158.53 157.97 79.95 78.02
11 236.70 240.10 140.30 94.00 157.89 158.81 79.89 78.92
12 230.50 228.50 127.00 95.70 158.26 158.74 79.37 79.37
13 226.80 227.00 129.90 91.30 158.21 158.42 80.38 78.04
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TOT110921  288        
AVG 18487 770 48 225.36 225.35 129.46 90.08 158.16 158.58 79.30 79.28
MAX 20250   241.30 240.10 141.90 95.70 159.12 159.40 80.38 80.61
MIN 16550   211.60 210.60 113.80 84.00 156.76 157.97 78.48 78.02