Bonneville Dam
Monday November 2, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | PH 1 Forebay Elevation | Tailwater Elevation | Average Head | Project Forebay Elevation | Stevenson Gage Elevation | Project Tailwater Elevation |
|---|
| 1 | 99.10 | 84.30 | 2.40 | 75.90 | 9.80 | 66.10 | 75.80 | 76.30 | 10.00 |
| 2 | 99.40 | 84.60 | 2.40 | 75.90 | 9.70 | 66.20 | 75.80 | 76.30 | 10.00 |
| 3 | 99.70 | 84.90 | 2.40 | 75.90 | 9.60 | 66.30 | 75.80 | 76.20 | 9.90 |
| 4 | 99.50 | 84.70 | 2.40 | 75.90 | 9.50 | 66.40 | 75.70 | 76.20 | 9.80 |
| 5 | 99.60 | 84.80 | 2.40 | 75.80 | 9.40 | 66.40 | 75.60 | 76.10 | 9.60 |
| 6 | 100.30 | 85.50 | 2.40 | 75.70 | 9.30 | 66.40 | 75.60 | 76.10 | 9.50 |
| 7 | 98.90 | 84.10 | 2.40 | 75.80 | 9.10 | 66.70 | 75.70 | 76.10 | 9.30 |
| 8 | 98.70 | 83.90 | 2.40 | 76.10 | 8.90 | 67.20 | 76.00 | 76.30 | 9.10 |
| 9 | 99.10 | 84.30 | 2.40 | 76.20 | 8.80 | 67.40 | 76.10 | 76.50 | 9.00 |
| 10 | 99.80 | 85.00 | 2.40 | 76.20 | 8.60 | 67.60 | 76.10 | 76.50 | 8.80 |
| 11 | 99.00 | 84.20 | 2.40 | 76.20 | 8.50 | 67.70 | 76.10 | 76.50 | 8.70 |
| 12 | 98.90 | 84.10 | 2.40 | 76.00 | 8.60 | 67.40 | 75.80 | 76.50 | 8.90 |
| 13 | 114.20 | 99.40 | 2.40 | 75.90 | 9.60 | 66.30 | 75.80 | 76.30 | 9.70 |
| 14 | 115.70 | 100.90 | 2.40 | 76.10 | 10.10 | 66.00 | 76.00 | 76.40 | 10.00 |
| 15 | 114.90 | 100.10 | 2.40 | 76.10 | 10.20 | 65.90 | 76.00 | 76.50 | 10.30 |
| 16 | 116.80 | 102.00 | 2.40 | 75.90 | 10.40 | 65.50 | 75.80 | 76.20 | 10.60 |
| 17 | 124.50 | 109.70 | 2.40 | 75.90 | 10.70 | 65.20 | 75.80 | 76.40 | 11.00 |
| 18 | 124.90 | 110.10 | 2.40 | 76.00 | 10.80 | 65.20 | 75.90 | 76.40 | 11.00 |
| 19 | 124.70 | 109.90 | 2.40 | 76.00 | 10.80 | 65.20 | 75.90 | 76.40 | 11.00 |
| 20 | 124.70 | 109.90 | 2.40 | 76.00 | 10.70 | 65.30 | 75.90 | 76.50 | 10.90 |
| 21 | 124.80 | 110.00 | 2.40 | 76.00 | 10.70 | 65.30 | 76.00 | 76.40 | 10.80 |
| 22 | 123.10 | 108.30 | 2.40 | 76.30 | 10.40 | 65.90 | 76.10 | 76.40 | 10.70 |
| 23 | 114.00 | 99.20 | 2.40 | 76.20 | 10.00 | 66.20 | 76.10 | 76.50 | 10.20 |
| 24 | 113.20 | 98.40 | 2.40 | 76.10 | 10.00 | 66.10 | 76.00 | 76.50 | 10.20 |
|
| AVG | 109.48 | 94.68 | 2.40 | 76.00 | 9.76 | 66.25 | 75.89 | 76.35 | 9.96 |
|
| MAX | 124.90 | 110.10 | 2.40 | 76.30 | 10.80 | 67.70 | 76.10 | 76.50 | 11.00 |
| MIN | 98.70 | 83.90 | 2.40 | 75.70 | 8.50 | 65.20 | 75.60 | 76.10 | 8.70 |
| |
Powerhouse 1 |
Powerhouse 2 |
Project |
| Hour | Generation Flow kcfs | Forebay Elevation | Forebay Elevation | Generation Flow kcfs | Spillway Gates in Use | Miscellaneous Flow kcfs* |
|---|
| 1 | 18.20 | 75.9 | 75.8 | 66.10 | 2 | 12.4 |
| 2 | 18.30 | 75.9 | 75.8 | 66.30 | 2 | 12.4 |
| 3 | 18.40 | 75.9 | 75.8 | 66.50 | 2 | 12.4 |
| 4 | 18.30 | 75.9 | 75.7 | 66.40 | 2 | 12.4 |
| 5 | 18.30 | 75.8 | 75.6 | 66.50 | 2 | 12.4 |
| 6 | 18.30 | 75.7 | 75.6 | 67.20 | 2 | 12.4 |
| 7 | 18.10 | 75.8 | 75.7 | 66.00 | 2 | 12.4 |
| 8 | 17.90 | 76.1 | 76.0 | 66.00 | 2 | 12.4 |
| 9 | 18.00 | 76.2 | 76.1 | 66.30 | 2 | 12.4 |
| 10 | 18.10 | 76.2 | 76.1 | 66.90 | 2 | 12.4 |
| 11 | 17.90 | 76.2 | 76.1 | 66.30 | 2 | 12.4 |
| 12 | 17.80 | 76.0 | 75.8 | 66.30 | 2 | 12.4 |
| 13 | 31.30 | 75.9 | 75.8 | 68.10 | 2 | 12.4 |
| 14 | 34.50 | 76.1 | 76.0 | 66.40 | 2 | 12.4 |
| 15 | 34.30 | 76.1 | 76.0 | 65.80 | 2 | 12.4 |
| 16 | 35.00 | 75.9 | 75.8 | 67.00 | 2 | 12.4 |
| 17 | 37.10 | 75.9 | 75.8 | 72.60 | 2 | 12.4 |
| 18 | 37.30 | 76.0 | 75.9 | 72.80 | 2 | 12.4 |
| 19 | 37.20 | 76.0 | 75.9 | 72.70 | 2 | 12.4 |
| 20 | 34.30 | 76.0 | 75.9 | 75.60 | 2 | 12.4 |
| 21 | 37.20 | 76.0 | 76.0 | 72.80 | 2 | 12.4 |
| 22 | 36.70 | 76.3 | 76.1 | 71.60 | 2 | 12.4 |
| 23 | 34.00 | 76.2 | 76.1 | 65.20 | 2 | 12.4 |
| 24 | 34.10 | 76.1 | 76.0 | 64.30 | 2 | 12.4 |
|
| AVG | 26.69 | 76.0 | 75.9 | 67.99 | 2 | 12.4 |
|
| MAX | 37.30 | 76.3 | 76.1 | 75.60 | 2 | 12.4 |
| MIN | 17.80 | 75.7 | 75.6 | 64.30 | 2 | 12.4 |
* Miscellaneous Flow includes fish ladders, PH1 sluiceway, navigation lock,
PH2 DSM, UMT, and PH2 corner collector (B2CC). When all routes are in
operation (March-August), total Misc Flow will be ~12.4 kcfs. Flow through
the B2CC is ~5 kcfs, so fluctuations of +/-5 kcfs at any time of year
indicate the B2CC is open/closed.