Chief Joseph Dam
Friday May 8, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head | Average Forebay Elevation | Average Tailwater Elevation |
| 1 | 118.90 | 118.90 | 0.00 | 953.70 | 781.80 | 171.90 | 953.80 | 781.70 |
| 2 | 114.30 | 114.30 | 0.00 | 953.90 | 781.20 | 172.70 | 953.80 | 781.50 |
| 3 | 110.90 | 110.90 | 0.00 | 953.90 | 781.50 | 172.40 | 953.90 | 781.30 |
| 4 | 111.90 | 111.90 | 0.00 | 953.90 | 781.10 | 172.80 | 953.90 | 781.30 |
| 5 | 111.70 | 111.70 | 0.00 | 953.80 | 781.20 | 172.60 | 952.90 | 781.10 |
| 6 | 121.40 | 121.40 | 0.00 | 953.70 | 781.90 | 171.80 | 953.80 | 781.80 |
| 7 | 121.60 | 121.60 | 0.00 | 953.70 | 782.20 | 171.50 | 953.70 | 781.90 |
| 8 | 130.70 | 130.70 | 0.00 | 953.70 | 782.30 | 171.40 | 953.70 | 782.60 |
| 9 | 112.90 | 112.90 | 0.00 | 953.80 | 781.50 | 172.30 | 953.70 | 781.50 |
| 10 | 111.60 | 111.60 | 0.00 | 953.60 | 781.60 | 172.00 | 953.80 | 781.70 |
| 11 | 108.20 | 108.20 | 0.00 | 953.50 | 781.90 | 171.60 | 953.50 | 781.90 |
| 12 | 111.90 | 111.90 | 0.00 | 953.20 | 782.40 | 170.80 | 953.30 | 782.30 |
| 13 | 109.10 | 109.10 | 0.00 | 953.30 | 782.90 | 170.40 | 953.20 | 782.70 |
| 14 | 94.80 | 94.80 | 0.00 | 953.20 | 782.50 | 170.70 | 953.30 | 782.30 |
| 15 | 90.80 | 90.80 | 0.00 | 953.00 | 782.70 | 170.30 | 953.20 | 782.60 |
| 16 | 89.20 | 89.20 | 0.00 | 952.80 | 782.50 | 170.30 | 952.90 | 782.50 |
| 17 | 93.30 | 93.30 | 0.00 | 952.50 | 783.00 | 169.50 | 952.60 | 782.80 |
| 18 | 104.10 | 104.10 | 0.00 | 951.80 | 784.30 | 167.50 | 952.30 | 783.20 |
| 19 | 135.20 | 135.20 | 0.00 | 951.50 | 784.70 | 166.80 | 951.70 | 784.80 |
| 20 | 129.20 | 129.20 | 0.00 | 951.80 | 784.10 | 167.70 | 951.60 | 784.30 |
| 21 | 120.10 | 120.10 | 0.00 | 952.10 | 783.90 | 168.20 | 952.00 | 783.80 |
| 22 | 119.80 | 119.80 | 0.00 | 952.20 | 783.50 | 168.70 | 952.20 | 783.70 |
| 23 | 121.70 | 121.70 | 0.00 | 952.30 | 783.50 | 168.80 | 952.30 | 783.60 |
| 24 | 117.90 | 117.90 | 0.00 | 952.50 | 783.00 | 169.50 | 952.40 | 783.20 |
|
| AVG | 112.97 | 112.97 | 0.00 | 953.06 | 782.55 | 170.51 | 953.06 | 782.50 |
|
| MAX | 135.20 | 135.20 | 0.00 | 953.90 | 784.70 | 172.80 | 953.90 | 784.80 |
| MIN | 89.20 | 89.20 | 0.00 | 951.50 | 781.10 | 166.80 | 951.60 | 781.10 |