Chief Joseph Dam
Saturday May 2, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
|---|
| 1 | 160.40 | 156.90 | 3.50 | 955.20 | 786.80 | 168.40 | 955.30 | 785.90 |
| 2 | 181.20 | 158.20 | 23.00 | 955.10 | 787.00 | 168.10 | 955.20 | 787.00 |
| 3 | 181.00 | 158.00 | 23.00 | 955.20 | 787.10 | 168.10 | 955.10 | 787.00 |
| 4 | 180.00 | 157.00 | 23.00 | 955.00 | 787.20 | 167.80 | 955.10 | 787.20 |
| 5 | 170.90 | 155.10 | 15.80 | 955.10 | 785.80 | 169.30 | 955.00 | 786.60 |
| 6 | 154.10 | 154.10 | 0.00 | 955.00 | 786.20 | 168.80 | 955.10 | 786.10 |
| 7 | 153.60 | 153.60 | 0.00 | 955.00 | 785.80 | 169.20 | 955.00 | 786.00 |
| 8 | 149.80 | 149.80 | 0.00 | 955.00 | 785.70 | 169.30 | 955.10 | 785.70 |
| 9 | 148.90 | 148.90 | 0.00 | 954.40 | 786.00 | 168.40 | 954.80 | 785.60 |
| 10 | 153.10 | 153.10 | 0.00 | 953.70 | 785.80 | 167.90 | 954.10 | 785.80 |
| 11 | 151.30 | 151.30 | 0.00 | 953.30 | 785.40 | 167.90 | 953.50 | 785.90 |
| 12 | 142.70 | 142.70 | 0.00 | 952.80 | 785.00 | 167.80 | 953.00 | 785.30 |
| 13 | 132.70 | 132.70 | 0.00 | 952.40 | 784.50 | 167.90 | 952.60 | 784.80 |
| 14 | 117.00 | 117.00 | 0.00 | 952.10 | 783.80 | 168.30 | 952.30 | 783.90 |
| 15 | 107.40 | 107.40 | 0.00 | 951.80 | 783.30 | 168.50 | 951.90 | 783.60 |
| 16 | 92.30 | 92.30 | 0.00 | 951.80 | 782.50 | 169.30 | 951.80 | 782.60 |
| 17 | 92.10 | 92.10 | 0.00 | 951.50 | 783.20 | 168.30 | 951.60 | 782.50 |
| 18 | 118.70 | 118.70 | 0.00 | 951.30 | 783.90 | 167.40 | 951.30 | 783.60 |
| 19 | 136.00 | 136.00 | 0.00 | 951.20 | 784.50 | 166.70 | 951.30 | 784.10 |
| 20 | 154.50 | 154.50 | 0.00 | 951.20 | 785.30 | 165.90 | 951.20 | 784.90 |
| 21 | 149.30 | 149.30 | 0.00 | 951.80 | 784.40 | 167.40 | 951.50 | 784.70 |
| 22 | 160.60 | 160.60 | 0.00 | 951.80 | 785.10 | 166.70 | 951.70 | 785.20 |
| 23 | 162.10 | 162.10 | 0.00 | 952.00 | 785.00 | 167.00 | 951.80 | 785.30 |
| 24 | 151.70 | 151.70 | 0.00 | 952.60 | 783.90 | 168.70 | 952.20 | 784.80 |
|
| AVG | 145.89 | 142.21 | 3.68 | 953.18 | 785.13 | 168.05 | 953.23 | 785.17 |
|
| MAX | 181.20 | 162.10 | 23.00 | 955.20 | 787.20 | 169.30 | 955.30 | 787.20 |
| MIN | 92.10 | 92.10 | 0.00 | 951.20 | 782.50 | 165.90 | 951.20 | 782.50 |