Chief Joseph Dam
Tuesday April 7, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
| 1 | 101.60 | 101.60 | 0.00 | 953.80 | 781.40 | 172.40 | 953.70 | 781.20 |
| 2 | 101.50 | 101.50 | 0.00 | 953.60 | 781.50 | 172.10 | 953.70 | 781.30 |
| 3 | 101.70 | 101.70 | 0.00 | 953.50 | 781.40 | 172.10 | 953.50 | 781.30 |
| 4 | 102.00 | 102.00 | 0.00 | 953.40 | 781.50 | 171.90 | 953.50 | 781.40 |
| 5 | 102.20 | 102.20 | 0.00 | 953.20 | 781.70 | 171.50 | 953.30 | 781.60 |
| 6 | 102.50 | 102.50 | 0.00 | 953.10 | 781.50 | 171.60 | 953.10 | 781.60 |
| 7 | 102.30 | 102.30 | 0.00 | 953.30 | 781.60 | 171.70 | 953.10 | 781.60 |
| 8 | 101.00 | 101.00 | 0.00 | 953.40 | 781.40 | 172.00 | 953.40 | 781.60 |
| 9 | 83.00 | 83.00 | 0.00 | 953.60 | 780.90 | 172.70 | 953.50 | 780.80 |
| 10 | 84.60 | 84.60 | 0.00 | 953.60 | 780.50 | 173.10 | 953.60 | 780.90 |
| 11 | 72.30 | 72.30 | 0.00 | 953.60 | 780.50 | 173.10 | 953.60 | 780.40 |
| 12 | 68.20 | 68.20 | 0.00 | 953.30 | 780.00 | 173.30 | 953.50 | 780.20 |
| 13 | 54.90 | 54.90 | 0.00 | 953.40 | 779.50 | 173.90 | 953.40 | 779.60 |
| 14 | 51.10 | 51.10 | 0.00 | 953.30 | 779.10 | 174.20 | 953.40 | 779.30 |
| 15 | 48.20 | 48.20 | 0.00 | 953.20 | 778.90 | 174.30 | 953.30 | 779.10 |
| 16 | 50.80 | 50.80 | 0.00 | 952.90 | 779.10 | 173.80 | 953.10 | 778.90 |
| 17 | 64.60 | 64.60 | 0.00 | 952.60 | 779.30 | 173.30 | 952.80 | 779.20 |
| 18 | 83.90 | 83.90 | 0.00 | 952.30 | 780.30 | 172.00 | 952.40 | 780.00 |
| 19 | 101.50 | 101.50 | 0.00 | 951.80 | 780.90 | 170.90 | 952.00 | 780.70 |
| 20 | 102.50 | 102.50 | 0.00 | 952.00 | 780.90 | 171.10 | 951.70 | 780.70 |
| 21 | 102.30 | 102.30 | 0.00 | 952.30 | 780.70 | 171.60 | 952.10 | 780.70 |
| 22 | 102.20 | 102.20 | 0.00 | 952.60 | 780.60 | 172.00 | 952.40 | 780.60 |
| 23 | 101.70 | 101.70 | 0.00 | 952.90 | 780.50 | 172.40 | 952.70 | 780.50 |
| 24 | 100.70 | 100.70 | 0.00 | 953.20 | 780.00 | 173.20 | 953.00 | 780.40 |
|
| AVG | 86.97 | 86.97 | 0.00 | 953.08 | 780.57 | 172.51 | 953.07 | 780.57 |
|
| MAX | 102.50 | 102.50 | 0.00 | 953.80 | 781.70 | 174.30 | 953.70 | 781.60 |
| MIN | 48.20 | 48.20 | 0.00 | 951.80 | 778.90 | 170.90 | 951.70 | 778.90 |