Grand Coulee Dam
June 2026
| Day of Month | Total Generation MWh | Average Generation MW | Station Use MWh | Inflow kcfs | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Midnight Reservoir Elevation | Average Forebay Elevation | Average Tailwater Elevation | Average Head feet | Banks Lake Pump kcfs | Banks Lake Pump MWh | Banks 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 |
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| 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 |
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| 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 |