Chief Joseph Dam
Wednesday April 8, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
| 1 | 93.30 | 93.30 | 0.00 | 953.40 | 780.40 | 173.00 | 953.30 | 780.00 |
| 2 | 100.90 | 100.90 | 0.00 | 953.60 | 780.10 | 173.50 | 953.50 | 780.20 |
| 3 | 100.70 | 100.70 | 0.00 | 953.40 | 780.00 | 173.40 | 953.50 | 780.10 |
| 4 | 98.40 | 98.40 | 0.00 | 953.30 | 779.90 | 173.40 | 953.40 | 779.90 |
| 5 | 100.80 | 100.80 | 0.00 | 953.30 | 780.10 | 173.20 | 953.30 | 780.00 |
| 6 | 101.10 | 101.10 | 0.00 | 953.20 | 779.90 | 173.30 | 953.20 | 780.00 |
| 7 | 100.90 | 100.90 | 0.00 | 953.40 | 780.00 | 173.40 | 953.30 | 780.00 |
| 8 | 100.70 | 100.70 | 0.00 | 953.70 | 779.90 | 173.80 | 953.60 | 780.00 |
| 9 | 100.20 | 100.20 | 0.00 | 954.20 | 779.90 | 174.30 | 954.20 | 779.90 |
| 10 | 100.00 | 100.00 | 0.00 | 954.50 | 780.00 | 174.50 | 954.40 | 780.00 |
| 11 | 99.80 | 99.80 | 0.00 | 954.50 | 780.10 | 174.40 | 954.50 | 780.00 |
| 12 | 99.90 | 99.90 | 0.00 | 954.50 | 780.20 | 174.30 | 954.50 | 780.20 |
| 13 | 100.20 | 100.20 | 0.00 | 954.40 | 780.40 | 174.00 | 954.40 | 780.30 |
| 14 | 98.40 | 98.40 | 0.00 | 954.20 | 780.30 | 173.90 | 954.20 | 780.60 |
| 15 | 90.70 | 90.70 | 0.00 | 954.00 | 780.30 | 173.70 | 954.10 | 780.50 |
| 16 | 68.00 | 68.00 | 0.00 | 953.80 | 780.20 | 173.60 | 954.00 | 779.40 |
| 17 | 89.00 | 89.00 | 0.00 | 953.20 | 781.40 | 171.80 | 953.50 | 780.90 |
| 18 | 100.10 | 100.10 | 0.00 | 952.60 | 781.40 | 171.20 | 952.80 | 781.40 |
| 19 | 102.50 | 102.50 | 0.00 | 952.80 | 781.10 | 171.70 | 952.60 | 781.20 |
| 20 | 102.10 | 102.10 | 0.00 | 952.90 | 781.10 | 171.80 | 952.70 | 781.10 |
| 21 | 101.80 | 101.80 | 0.00 | 953.30 | 780.80 | 172.50 | 953.10 | 780.90 |
| 22 | 101.60 | 101.60 | 0.00 | 953.60 | 780.90 | 172.70 | 953.50 | 780.90 |
| 23 | 101.30 | 101.30 | 0.00 | 953.90 | 780.80 | 173.10 | 953.80 | 780.80 |
| 24 | 100.90 | 100.90 | 0.00 | 954.10 | 780.90 | 173.20 | 954.00 | 780.80 |
|
| AVG | 98.05 | 98.05 | 0.00 | 953.66 | 780.42 | 173.24 | 953.64 | 780.38 |
|
| MAX | 102.50 | 102.50 | 0.00 | 954.50 | 781.40 | 174.50 | 954.50 | 781.40 |
| MIN | 68.00 | 68.00 | 0.00 | 952.60 | 779.90 | 171.20 | 952.60 | 779.40 |