US Army Corps of Engineers

Grand Coulee Dam

July 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 80138 3339 203 144.60 135.80 135.70 0.10 1285.70 1285.60 964.28 321.32 7.63 5239 1568.86
2 153.10 131.10 131.00 0.10 1286.10 1285.87 963.70 322.17 1568.78
3 148.90 130.90 130.80 0.10 1286.30 1286.25 964.17 322.08 1569.00
4 145.10 118.90 118.80 0.10 1286.60 1286.51 963.03 323.48 1569.36
5 144.30 114.00 113.90 0.10 1287.10 1286.88 962.61 324.27 1569.65
6 137.60 96.00 96.00 0.10 1287.90 1287.59 960.48 327.11 1569.58
7 132.90 99.00 98.90 0.10 1288.50 1288.30 960.22 328.08 1569.57
8 118.70 97.60 97.50 0.10 1288.90 1288.84 960.60 328.24 1569.45
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TOT 80138  203           
AVG 80138 3339 203 140.65 115.41 115.32 0.10 1287.14 1286.98 962.39 324.59 7.63 5239 1569.28
MAX 80138   153.10 135.80 135.70 0.10 1288.90 1288.84 964.28 328.24 7.63 5239 1569.65
MIN 80138   118.70 96.00 96.00 0.10 1285.70 1285.60 960.22 321.32 7.63 5239 1568.78