The Dalles Dam
May 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 | | | | 228.60 | 233.60 | 136.80 | 91.00 | 157.24 | 158.35 | 78.74 | 79.61 |
| 2 | | | | 214.90 | 217.40 | 118.60 | 93.00 | 156.76 | 158.08 | 78.48 | 79.60 |
| 3 | | | | 228.20 | 221.40 | 128.60 | 87.00 | 158.03 | 158.32 | 79.18 | 79.14 |
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| TOT | | | | | | | | | | | |
| AVG | | | | 223.90 | 224.13 | 128.00 | 90.33 | 157.34 | 158.25 | 78.80 | 79.45 |
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| MAX | | | | 228.60 | 233.60 | 136.80 | 93.00 | 158.03 | 158.35 | 79.18 | 79.61 |
| MIN | | | | 214.90 | 217.40 | 118.60 | 87.00 | 156.76 | 158.08 | 78.48 | 79.14 |