Chief Joseph Dam
Tuesday September 22, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
| 1 | 48.00 | 48.00 | 0.00 | 953.10 | 777.40 | 175.70 | 953.10 | 777.30 |
| 2 | 42.10 | 42.10 | 0.00 | 953.30 | 777.00 | 176.30 | 953.10 | 777.20 |
| 3 | 34.20 | 34.20 | 0.00 | 953.20 | 777.30 | 175.90 | 953.30 | 777.00 |
| 4 | 33.80 | 33.80 | 0.00 | 953.30 | 777.20 | 176.10 | 953.20 | 777.30 |
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| AVG | 39.52 | 39.52 | 0.00 | 953.23 | 777.22 | 176.00 | 953.17 | 777.20 |
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| MAX | 48.00 | 48.00 | 0.00 | 953.30 | 777.40 | 176.30 | 953.30 | 777.30 |
| MIN | 33.80 | 33.80 | 0.00 | 953.10 | 777.00 | 175.70 | 953.10 | 777.00 |