Chief Joseph Dam & Rufus Woods Lake
August 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 | | | | 84.70 | 93.00 | 93.00 | 0.00 | 952.90 | 953.00 | 781.30 | 171.70 |
| 2 | | | | 79.30 | 80.50 | 80.50 | 0.00 | 952.60 | 952.40 | 780.90 | 171.50 |
| 3 | | | | 90.60 | 88.30 | 88.30 | 0.00 | 953.20 | 952.50 | 781.20 | 171.30 |
| 4 | | | | 91.70 | 91.30 | 91.30 | 0.00 | 953.30 | 952.20 | 781.60 | 170.60 |
| 5 | | | | 90.80 | 89.60 | 89.60 | 0.00 | 953.60 | 952.60 | 781.60 | 171.00 |
| 6 | | | | 93.30 | 95.60 | 95.60 | 0.00 | 953.00 | 953.00 | 782.10 | 170.90 |
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| TOT | | | | | | | | | | | |
| AVG | | | | 88.40 | 89.72 | 89.72 | 0.00 | 953.10 | 952.62 | 781.45 | 171.17 |
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| MAX | | | | 93.30 | 95.60 | 95.60 | 0.00 | 953.60 | 953.00 | 782.10 | 171.70 |
| MIN | | | | 79.30 | 80.50 | 80.50 | 0.00 | 952.60 | 952.20 | 780.90 | 170.60 |