US Army Corps of Engineers

Grand Coulee Dam

June 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetBanks Lake Pump kcfsBanks Lake Pump MWhBanks Lake Elev
1 94917 3955 208 187.10 166.50 166.50 0.00 1274.70 1274.57 967.30 307.27 8.68 6039 1569.24
2 193.10 168.50 168.50 0.00 1275.20 1274.97 967.57 307.40 1569.21
3 183.60 170.90 170.90 0.00 1275.30 1275.22 967.46 307.76 1569.25
4 187.90 166.90 166.90 0.00 1275.70 1275.47 966.94 308.53 1569.21
5 182.70 158.60 158.60 0.00 1276.10 1275.95 966.58 309.37 1569.22
6 183.80 156.30 156.30 0.00 1276.60 1276.41 966.96 309.45 1569.35
7 187.40 141.00 141.00 0.00 1277.60 1277.18 965.24 311.94 1569.61
8 181.90 154.90 154.90 0.00 1278.10 1277.83 966.23 311.60 1569.58
9
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30
TOT 94917  208           
AVG 94917 3955 208 185.94 160.45 160.45 0.00 1276.16 1275.95 966.79 309.17 8.68 6039 1569.33
MAX 94917   193.10 170.90 170.90 0.00 1278.10 1277.83 967.57 311.94 8.68 6039 1569.61
MIN 94917   181.90 141.00 141.00 0.00 1274.70 1274.57 965.24 307.27 8.68 6039 1569.21