The Dalles Dam
December 2025
| 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 | 17879 | 745 | 48 | 118.40 | 124.00 | 118.20 | 0.00 | 157.42 | 158.32 | 75.35 | 82.97 |
| 2 | 17576 | 732 | 48 | 121.70 | 123.60 | 117.70 | 0.00 | 157.08 | 157.98 | 76.15 | 81.83 |
| 3 | | | | 122.80 | 116.60 | 110.70 | 0.00 | 158.27 | 157.79 | 76.08 | 81.71 |
| 4 | | | | 131.20 | 128.50 | 122.70 | 0.00 | 158.78 | 158.79 | 76.01 | 82.78 |
| 5 | | | | 135.40 | 134.30 | 128.50 | 0.00 | 159.00 | 158.97 | 75.86 | 83.11 |
| 6 | | | | 142.60 | 143.60 | 137.80 | 0.00 | 158.79 | 158.75 | 76.73 | 82.02 |
| 7 | | | | 140.60 | 141.70 | 135.80 | 0.00 | 158.55 | 158.93 | 77.16 | 81.77 |
| 8 | | | | 134.50 | 135.20 | 129.40 | 0.00 | 158.42 | 159.00 | 77.04 | 81.96 |
| 9 | | | | 131.50 | 127.80 | 121.90 | 0.00 | 159.12 | 158.75 | 77.00 | 81.75 |
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| TOT | 35455 | | 96 | | | | | | | | |
| AVG | 17728 | 739 | 48 | 130.97 | 130.59 | 124.74 | 0.00 | 158.38 | 158.59 | 76.38 | 82.21 |
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| MAX | 17879 | | | 142.60 | 143.60 | 137.80 | 0.00 | 159.12 | 159.00 | 77.16 | 83.11 |
| MIN | 17576 | | | 118.40 | 116.60 | 110.70 | 0.00 | 157.08 | 157.79 | 75.35 | 81.71 |