Chief Joseph Dam & Rufus Woods Lake
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 |
| 1 | | | | 167.60 | 159.10 | 155.40 | 3.70 | 954.40 | 953.30 | 786.10 | 167.20 |
| 2 | | | | 172.00 | 179.80 | 157.50 | 22.30 | 952.40 | 953.10 | 787.00 | 166.10 |
| 3 | | | | 175.50 | 178.20 | 155.80 | 22.40 | 951.60 | 952.30 | 786.50 | 165.80 |
| 4 | | | | 170.40 | 163.80 | 157.70 | 6.10 | 953.30 | 952.10 | 785.90 | 166.20 |
| 5 | | | | 160.50 | 156.20 | 156.20 | 0.00 | 954.40 | 953.40 | 785.70 | 167.70 |
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| TOT | | | | | | | | | | | |
| AVG | | | | 169.20 | 167.42 | 156.52 | 10.90 | 953.22 | 952.84 | 786.24 | 166.60 |
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| MAX | | | | 175.50 | 179.80 | 157.70 | 22.40 | 954.40 | 953.40 | 787.00 | 167.70 |
| MIN | | | | 160.50 | 156.20 | 155.40 | 0.00 | 951.60 | 952.10 | 785.70 | 165.80 |