Chief Joseph Dam
Tuesday September 15, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
|---|
| 1 | 54.80 | 54.80 | 0.00 | 951.90 | 780.60 | 171.30 | 951.80 | 780.60 |
| 2 | 39.80 | 39.80 | 0.00 | 951.70 | 780.30 | 171.40 | 951.80 | 780.30 |
| 3 | 26.60 | 26.60 | 0.00 | 951.70 | 780.10 | 171.60 | 951.60 | 780.00 |
| 4 | 25.20 | 25.20 | 0.00 | 951.90 | 779.90 | 172.00 | 951.80 | 780.20 |
| 5 | 25.30 | 25.30 | 0.00 | 951.90 | 779.70 | 172.20 | 951.90 | 779.90 |
| 6 | 25.70 | 25.70 | 0.00 | 952.00 | 780.20 | 171.80 | 952.00 | 779.80 |
| 7 | 38.80 | 38.80 | 0.00 | 952.00 | 780.50 | 171.50 | 951.90 | 780.10 |
| 8 | 57.00 | 57.00 | 0.00 | 952.30 | 780.10 | 172.20 | 952.10 | 780.40 |
| 9 | 54.10 | 54.10 | 0.00 | 952.30 | 780.10 | 172.20 | 952.30 | 780.20 |
| 10 | 51.50 | 51.50 | 0.00 | 952.30 | 780.30 | 172.00 | 952.30 | 780.30 |
| 11 | 49.60 | 49.60 | 0.00 | 952.40 | 780.30 | 172.10 | 952.30 | 780.30 |
| 12 | 37.60 | 37.60 | 0.00 | 952.70 | 780.20 | 172.50 | 952.60 | 780.10 |
| 13 | 36.60 | 36.60 | 0.00 | 952.60 | 780.20 | 172.40 | 952.60 | 780.20 |
| 14 | 41.10 | 41.10 | 0.00 | 952.60 | 780.20 | 172.40 | 952.60 | 780.40 |
| 15 | 35.60 | 35.60 | 0.00 | 952.80 | 780.30 | 172.50 | 952.70 | 780.10 |
| 16 | 35.80 | 35.80 | 0.00 | 952.70 | 780.30 | 172.40 | 952.80 | 780.20 |
| 17 | 43.20 | 43.20 | 0.00 | 952.70 | 780.40 | 172.30 | 952.60 | 780.50 |
| 18 | 46.80 | 46.80 | 0.00 | 952.90 | 779.60 | 173.30 | 952.70 | 779.70 |
| 19 | 47.50 | 47.50 | 0.00 | 952.90 | 779.00 | 173.90 | 953.00 | 779.30 |
| 20 | 44.90 | 44.90 | 0.00 | 952.90 | 778.20 | 174.70 | 953.00 | 778.70 |
| 21 | 44.70 | 44.70 | 0.00 | 953.00 | 778.00 | 175.00 | 953.00 | 778.30 |
| 22 | 43.80 | 43.80 | 0.00 | 953.10 | 777.70 | 175.40 | 953.00 | 778.00 |
| 23 | 41.90 | 41.90 | 0.00 | 953.10 | 777.80 | 175.30 | 953.10 | 778.00 |
| 24 | 40.90 | 40.90 | 0.00 | 953.20 | 778.20 | 175.00 | 953.10 | 778.20 |
|
| AVG | 41.20 | 41.20 | 0.00 | 952.48 | 779.68 | 172.81 | 952.44 | 779.74 |
|
| MAX | 57.00 | 57.00 | 0.00 | 953.20 | 780.60 | 175.40 | 953.10 | 780.60 |
| MIN | 25.20 | 25.20 | 0.00 | 951.70 | 777.70 | 171.30 | 951.60 | 778.00 |