Chief Joseph Dam
Thursday June 4, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
|---|
| 1 | 182.20 | 159.80 | 22.40 | 951.60 | 787.10 | 164.50 | 951.60 | 787.10 |
| 2 | 181.40 | 159.00 | 22.40 | 951.40 | 787.20 | 164.20 | 951.50 | 787.10 |
| 3 | 168.30 | 159.10 | 9.20 | 951.40 | 786.60 | 164.80 | 951.40 | 786.60 |
| 4 | 167.00 | 157.80 | 9.20 | 951.40 | 786.60 | 164.80 | 951.40 | 786.60 |
| 5 | 167.30 | 158.10 | 9.20 | 951.60 | 784.40 | 167.20 | 951.50 | 786.50 |
| 6 | 167.20 | 158.00 | 9.20 | 951.70 | 786.40 | 165.30 | 951.60 | 786.40 |
| 7 | 166.00 | 156.80 | 9.20 | 951.80 | 786.50 | 165.30 | 951.80 | 786.40 |
| 8 | 165.10 | 155.90 | 9.20 | 952.00 | 786.40 | 165.60 | 951.90 | 786.30 |
| 9 | 167.50 | 158.30 | 9.20 | 951.90 | 786.60 | 165.30 | 951.90 | 786.50 |
| 10 | 168.30 | 159.10 | 9.20 | 952.00 | 786.40 | 165.60 | 951.90 | 786.50 |
| 11 | 168.40 | 159.20 | 9.20 | 952.10 | 786.30 | 165.80 | 952.10 | 786.40 |
| 12 | 168.00 | 158.80 | 9.20 | 952.30 | 786.40 | 165.90 | 952.20 | 786.30 |
| 13 | 168.00 | 158.80 | 9.20 | 952.30 | 786.50 | 165.80 | 952.30 | 786.40 |
| 14 | 159.70 | 158.70 | 1.00 | 952.40 | 785.90 | 166.50 | 952.40 | 786.00 |
| 15 | 157.30 | 157.30 | 0.00 | 952.40 | 785.60 | 166.80 | 952.40 | 785.80 |
| 16 | 157.00 | 157.00 | 0.00 | 952.40 | 785.70 | 166.70 | 952.40 | 785.80 |
| 17 | 158.00 | 158.00 | 0.00 | 952.50 | 785.70 | 166.80 | 952.40 | 785.70 |
| 18 | 157.10 | 157.10 | 0.00 | 952.40 | 785.80 | 166.60 | 952.40 | 785.70 |
| 19 | 157.30 | 157.30 | 0.00 | 952.50 | 785.70 | 166.80 | 952.50 | 785.70 |
| 20 | 157.60 | 157.60 | 0.00 | 952.60 | 785.60 | 167.00 | 952.60 | 785.70 |
| 21 | 156.40 | 156.40 | 0.00 | 952.70 | 785.70 | 167.00 | 952.70 | 785.60 |
| 22 | 157.10 | 157.10 | 0.00 | 952.80 | 785.50 | 167.30 | 952.70 | 785.50 |
| 23 | 157.20 | 157.20 | 0.00 | 952.90 | 785.50 | 167.40 | 952.80 | 785.50 |
| 24 | 153.80 | 153.80 | 0.00 | 953.30 | 785.20 | 168.10 | 953.10 | 785.30 |
|
| AVG | 163.88 | 157.76 | 6.12 | 952.18 | 786.05 | 166.13 | 952.15 | 786.14 |
|
| MAX | 182.20 | 159.80 | 22.40 | 953.30 | 787.20 | 168.10 | 953.10 | 787.10 |
| MIN | 153.80 | 153.80 | 0.00 | 951.40 | 784.40 | 164.20 | 951.40 | 785.30 |