Chief Joseph Dam
Wednesday March 18, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
| 1 | 89.40 | 89.40 | 0.00 | 953.40 | 782.30 | 171.10 | 953.30 | 782.30 |
| 2 | 76.50 | 76.50 | 0.00 | 953.40 | 781.70 | 171.70 | 953.40 | 781.80 |
| 3 | 75.70 | 75.70 | 0.00 | 953.40 | 781.40 | 172.00 | 953.60 | 781.70 |
| 4 | 75.50 | 75.50 | 0.00 | 953.30 | 781.60 | 171.70 | 953.40 | 781.50 |
| 5 | 95.50 | 95.50 | 0.00 | 952.80 | 782.60 | 170.20 | 953.10 | 782.30 |
| 6 | 127.40 | 127.40 | 0.00 | 952.20 | 783.60 | 168.60 | 952.40 | 782.90 |
| 7 | 122.50 | 122.50 | 0.00 | 952.20 | 784.00 | 168.20 | 952.20 | 783.60 |
| 8 | 138.90 | 138.90 | 0.00 | 952.30 | 783.80 | 168.50 | 952.20 | 784.00 |
| 9 | 100.90 | 100.90 | 0.00 | 952.90 | 782.20 | 170.70 | 952.60 | 782.70 |
| 10 | 83.90 | 83.90 | 0.00 | 953.00 | 781.90 | 171.10 | 953.00 | 782.00 |
| 11 | 87.20 | 87.20 | 0.00 | 953.00 | 781.90 | 171.10 | 953.00 | 781.90 |
| 12 | 89.40 | 89.40 | 0.00 | 953.10 | 782.20 | 170.90 | 953.00 | 782.10 |
| 13 | 88.60 | 88.60 | 0.00 | 953.10 | 781.90 | 171.20 | 953.10 | 782.00 |
| 14 | 83.40 | 83.40 | 0.00 | 953.20 | 781.30 | 171.90 | 953.10 | 781.50 |
| 15 | 80.50 | 80.50 | 0.00 | 953.30 | 781.40 | 171.90 | 953.20 | 781.30 |
| 16 | 85.50 | 85.50 | 0.00 | 953.10 | 781.60 | 171.50 | 953.20 | 781.40 |
| 17 | 95.10 | 95.10 | 0.00 | 952.80 | 781.90 | 170.90 | 952.90 | 781.60 |
| 18 | 119.40 | 119.40 | 0.00 | 952.50 | 782.90 | 169.60 | 952.60 | 782.70 |
| 19 | 126.80 | 126.80 | 0.00 | 952.60 | 783.10 | 169.50 | 952.50 | 783.10 |
| 20 | 131.00 | 131.00 | 0.00 | 952.80 | 783.80 | 169.00 | 952.70 | 783.40 |
| 21 | 135.50 | 135.50 | 0.00 | 953.20 | 783.50 | 169.70 | 953.00 | 783.80 |
| 22 | 130.60 | 130.60 | 0.00 | 953.50 | 783.20 | 170.30 | 953.30 | 783.60 |
| 23 | 107.80 | 107.80 | 0.00 | 953.80 | 782.70 | 171.10 | 953.80 | 782.60 |
| 24 | 99.80 | 99.80 | 0.00 | 953.90 | 782.40 | 171.50 | 953.90 | 782.40 |
|
| AVG | 101.95 | 101.95 | 0.00 | 953.03 | 782.45 | 170.58 | 953.02 | 782.43 |
|
| MAX | 138.90 | 138.90 | 0.00 | 953.90 | 784.00 | 172.00 | 953.90 | 784.00 |
| MIN | 75.50 | 75.50 | 0.00 | 952.20 | 781.30 | 168.20 | 952.20 | 781.30 |