Chief Joseph Dam
Saturday June 20, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
|---|
| 1 | 120.80 | 120.80 | 0.00 | 953.70 | 781.60 | 172.10 | 953.80 | 781.90 |
| 2 | 103.70 | 103.70 | 0.00 | 953.60 | 780.60 | 173.00 | 953.60 | 780.80 |
| 3 | 102.00 | 102.00 | 0.00 | 953.00 | 780.40 | 172.60 | 953.30 | 780.50 |
| 4 | 128.40 | 128.40 | 0.00 | 952.30 | 781.80 | 170.50 | 952.60 | 781.90 |
| 5 | 119.50 | 119.50 | 0.00 | 952.00 | 780.90 | 171.10 | 952.10 | 781.50 |
| 6 | 88.50 | 88.50 | 0.00 | 952.00 | 779.50 | 172.50 | 952.10 | 779.70 |
| 7 | 77.00 | 77.00 | 0.00 | 952.00 | 778.90 | 173.10 | 951.90 | 779.10 |
| 8 | 66.80 | 66.80 | 0.00 | 952.20 | 778.90 | 173.30 | 952.10 | 778.80 |
| 9 | 60.00 | 60.00 | 0.00 | 952.30 | 778.20 | 174.10 | 952.20 | 778.60 |
| 10 | 56.80 | 56.80 | 0.00 | 952.00 | 778.80 | 173.20 | 952.20 | 778.40 |
| 11 | 59.20 | 59.20 | 0.00 | 952.10 | 778.60 | 173.50 | 952.00 | 778.50 |
| 12 | 59.60 | 59.60 | 0.00 | 952.10 | 778.40 | 173.70 | 952.10 | 778.50 |
| 13 | 57.00 | 57.00 | 0.00 | 952.20 | 778.00 | 174.20 | 952.20 | 778.20 |
| 14 | 50.20 | 50.20 | 0.00 | 952.30 | 777.30 | 175.00 | 952.30 | 777.50 |
| 15 | 52.70 | 52.70 | 0.00 | 952.30 | 777.60 | 174.70 | 952.40 | 777.50 |
| 16 | 52.60 | 52.60 | 0.00 | 952.30 | 777.60 | 174.70 | 952.40 | 777.10 |
| 17 | 83.60 | 83.60 | 0.00 | 952.10 | 779.00 | 173.10 | 952.20 | 779.00 |
| 18 | 95.30 | 95.30 | 0.00 | 952.20 | 780.00 | 172.20 | 952.20 | 779.50 |
| 19 | 114.30 | 114.30 | 0.00 | 952.20 | 781.10 | 171.10 | 952.20 | 780.80 |
| 20 | 113.20 | 113.20 | 0.00 | 952.40 | 781.10 | 171.30 | 952.30 | 781.10 |
| 21 | 111.70 | 111.70 | 0.00 | 952.50 | 781.20 | 171.30 | 952.50 | 781.10 |
| 22 | 106.20 | 106.20 | 0.00 | 952.50 | 781.30 | 171.20 | 952.50 | 781.10 |
| 23 | 112.80 | 112.80 | 0.00 | 952.50 | 781.60 | 170.90 | 952.50 | 781.60 |
| 24 | 108.50 | 108.50 | 0.00 | 952.60 | 781.50 | 171.10 | 952.50 | 781.60 |
|
| AVG | 87.52 | 87.52 | 0.00 | 952.39 | 779.75 | 172.65 | 952.43 | 779.76 |
|
| MAX | 128.40 | 128.40 | 0.00 | 953.70 | 781.80 | 175.00 | 953.80 | 781.90 |
| MIN | 50.20 | 50.20 | 0.00 | 952.00 | 777.30 | 170.50 | 951.90 | 777.10 |