Chief Joseph Dam
Saturday September 19, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
|---|
| 1 | 39.60 | 39.60 | 0.00 | 952.80 | 776.90 | 175.90 | 952.80 | 777.20 |
| 2 | 34.40 | 34.40 | 0.00 | 953.10 | 777.00 | 176.10 | 952.90 | 777.10 |
| 3 | 28.20 | 28.20 | 0.00 | 953.10 | 777.10 | 176.00 | 953.10 | 776.80 |
| 4 | 28.40 | 28.40 | 0.00 | 953.00 | 776.90 | 176.10 | 953.00 | 776.90 |
| 5 | 29.00 | 29.00 | 0.00 | 953.10 | 776.80 | 176.30 | 953.00 | 776.90 |
| 6 | 28.80 | 28.80 | 0.00 | 953.30 | 776.90 | 176.40 | 953.30 | 776.90 |
| 7 | 25.00 | 25.00 | 0.00 | 953.30 | 776.90 | 176.40 | 953.40 | 776.70 |
| 8 | 34.10 | 34.10 | 0.00 | 953.20 | 776.80 | 176.40 | 953.30 | 776.90 |
| 9 | 44.20 | 44.20 | 0.00 | 953.10 | 777.10 | 176.00 | 953.10 | 777.30 |
| 10 | 48.50 | 48.50 | 0.00 | 953.20 | 777.60 | 175.60 | 953.10 | 777.50 |
| 11 | 50.40 | 50.40 | 0.00 | 953.00 | 777.90 | 175.10 | 953.10 | 777.70 |
| 12 | 51.10 | 51.10 | 0.00 | 952.90 | 778.00 | 174.90 | 953.00 | 777.90 |
| 13 | 47.30 | 47.30 | 0.00 | 952.90 | 777.80 | 175.10 | 952.90 | 777.90 |
| 14 | 46.20 | 46.20 | 0.00 | 952.90 | 777.80 | 175.10 | 952.90 | 778.00 |
| 15 | 43.10 | 43.10 | 0.00 | 952.70 | 778.00 | 174.70 | 952.80 | 777.90 |
| 16 | 44.70 | 44.70 | 0.00 | 952.70 | 778.10 | 174.60 | 952.70 | 778.10 |
| 17 | 42.50 | 42.50 | 0.00 | 952.70 | 778.30 | 174.40 | 952.70 | 778.00 |
| 18 | 57.50 | 57.50 | 0.00 | 952.50 | 778.50 | 174.00 | 952.60 | 778.20 |
| 19 | 72.00 | 72.00 | 0.00 | 952.50 | 778.40 | 174.10 | 952.50 | 778.60 |
| 20 | 71.20 | 71.20 | 0.00 | 952.80 | 778.40 | 174.40 | 952.70 | 778.40 |
| 21 | 70.40 | 70.40 | 0.00 | 952.80 | 778.10 | 174.70 | 952.80 | 778.40 |
| 22 | 67.30 | 67.30 | 0.00 | 952.70 | 777.80 | 174.90 | 952.70 | 778.10 |
| 23 | 58.00 | 58.00 | 0.00 | 952.70 | 778.20 | 174.50 | 952.80 | 778.00 |
| 24 | 52.50 | 52.50 | 0.00 | 952.60 | 777.90 | 174.70 | 952.60 | 778.00 |
|
| AVG | 46.43 | 46.43 | 0.00 | 952.90 | 777.63 | 175.27 | 952.91 | 777.64 |
|
| MAX | 72.00 | 72.00 | 0.00 | 953.30 | 778.50 | 176.40 | 953.40 | 778.60 |
| MIN | 25.00 | 25.00 | 0.00 | 952.50 | 776.80 | 174.00 | 952.50 | 776.70 |