Bonneville Dam
Monday August 3, 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 | 113.10 | 31.00 | 69.70 | 76.10 | 11.30 | 64.80 | 75.90 | 76.40 | 11.30 |
| 2 | 113.00 | 30.80 | 69.80 | 76.00 | 11.20 | 64.80 | 75.80 | 76.40 | 11.20 |
| 3 | 113.10 | 30.90 | 69.80 | 76.00 | 11.20 | 64.80 | 75.90 | 76.40 | 11.10 |
| 4 | 113.20 | 31.00 | 69.80 | 75.90 | 11.10 | 64.80 | 75.80 | 76.40 | 11.00 |
| 5 | 113.00 | 30.80 | 69.80 | 76.00 | 11.00 | 65.00 | 75.90 | 76.40 | 10.90 |
| 6 | 113.00 | 30.80 | 69.80 | 76.00 | 10.90 | 65.10 | 75.80 | 76.40 | 10.80 |
| 7 | 113.90 | 31.70 | 69.80 | 76.10 | 10.80 | 65.30 | 75.90 | 76.40 | 10.70 |
| 8 | 113.90 | 31.70 | 69.80 | 76.10 | 10.70 | 65.40 | 75.90 | 76.40 | 10.70 |
| 9 | 113.90 | 31.70 | 69.80 | 76.10 | 10.70 | 65.40 | 75.90 | 76.40 | 10.60 |
| 10 | 113.20 | 31.10 | 69.70 | 76.10 | 10.70 | 65.40 | 76.00 | 76.40 | 10.60 |
| 11 | 113.10 | 31.10 | 69.60 | 76.00 | 10.70 | 65.30 | 75.90 | 76.40 | 10.70 |
| 12 | 118.70 | 31.20 | 75.10 | 75.90 | 11.20 | 64.70 | 75.80 | 76.40 | 11.10 |
| 13 | 119.20 | 31.30 | 75.50 | 75.90 | 11.20 | 64.70 | 75.80 | 76.30 | 11.10 |
| 14 | 119.00 | 31.10 | 75.50 | 76.00 | 11.10 | 64.90 | 75.90 | 76.40 | 11.10 |
| 15 | 119.10 | 31.20 | 75.50 | 76.00 | 11.20 | 64.80 | 75.90 | 76.40 | 11.10 |
| 16 | 119.10 | 31.20 | 75.50 | 76.00 | 11.10 | 64.90 | 75.90 | 76.40 | 11.20 |
| 17 | 119.10 | 31.20 | 75.50 | 76.00 | 11.00 | 65.00 | 75.90 | 76.40 | 11.00 |
| 18 | 119.10 | 31.20 | 75.50 | 75.70 | 11.00 | 64.70 | 75.90 | 76.50 | 11.00 |
| 19 | 119.40 | 31.40 | 75.60 | 75.70 | 11.10 | 64.60 | 76.00 | 76.50 | 11.00 |
| 20 | 118.90 | 30.90 | 75.60 | 76.20 | 10.90 | 65.30 | 76.00 | 76.50 | 10.90 |
| 21 | 118.90 | 30.80 | 75.70 | 76.10 | 11.00 | 65.10 | 76.00 | 76.50 | 10.90 |
| 22 | 119.20 | 31.00 | 75.80 | 76.20 | 10.90 | 65.30 | 76.10 | 76.60 | 10.90 |
| 23 | 126.30 | 30.90 | 83.00 | 76.20 | 11.50 | 64.70 | 76.10 | 76.70 | 11.40 |
| 24 | 126.20 | 30.50 | 83.30 | 76.10 | 11.70 | 64.40 | 76.00 | 76.60 | 11.70 |
|
| AVG | 117.02 | 31.10 | 73.52 | 76.02 | 11.05 | 64.97 | 75.92 | 76.44 | 11.00 |
|
| MAX | 126.30 | 31.70 | 83.30 | 76.20 | 11.70 | 65.40 | 76.10 | 76.70 | 11.70 |
| MIN | 113.00 | 30.50 | 69.60 | 75.70 | 10.70 | 64.40 | 75.80 | 76.30 | 10.60 |
| |
Powerhouse 1 |
Powerhouse 2 |
Project |
| Hour | Generation Flow kcfs | Forebay Elevation | Forebay Elevation | Generation Flow kcfs | Spillway Gates in Use | Miscellaneous Flow kcfs* |
|---|
| 1 | 0.00 | 76.1 | 75.9 | 31.00 | 15 | 12.4 |
| 2 | 0.00 | 76.0 | 75.8 | 30.80 | 15 | 12.4 |
| 3 | 0.00 | 76.0 | 75.9 | 30.90 | 15 | 12.4 |
| 4 | 0.00 | 75.9 | 75.8 | 31.00 | 15 | 12.4 |
| 5 | 0.00 | 76.0 | 75.9 | 30.80 | 15 | 12.4 |
| 6 | 0.00 | 76.0 | 75.8 | 30.80 | 15 | 12.4 |
| 7 | 0.00 | 76.1 | 75.9 | 31.70 | 15 | 12.4 |
| 8 | 0.00 | 76.1 | 75.9 | 31.70 | 15 | 12.4 |
| 9 | 0.00 | 76.1 | 75.9 | 31.70 | 15 | 12.4 |
| 10 | 0.00 | 76.1 | 76.0 | 31.10 | 15 | 12.4 |
| 11 | 0.00 | 76.0 | 75.9 | 31.10 | 15 | 12.4 |
| 12 | 0.00 | 75.9 | 75.8 | 31.20 | 16 | 12.4 |
| 13 | 0.00 | 75.9 | 75.8 | 31.30 | 16 | 12.4 |
| 14 | 0.00 | 76.0 | 75.9 | 31.10 | 16 | 12.4 |
| 15 | 0.00 | 76.0 | 75.9 | 31.20 | 16 | 12.4 |
| 16 | 0.00 | 76.0 | 75.9 | 31.20 | 16 | 12.4 |
| 17 | 0.00 | 76.0 | 75.9 | 31.20 | 16 | 12.4 |
| 18 | 0.00 | 75.7 | 75.9 | 31.20 | 16 | 12.4 |
| 19 | 0.00 | 75.7 | 76.0 | 31.40 | 16 | 12.4 |
| 20 | 0.00 | 76.2 | 76.0 | 30.90 | 16 | 12.4 |
| 21 | 0.00 | 76.1 | 76.0 | 30.80 | 16 | 12.4 |
| 22 | 0.00 | 76.2 | 76.1 | 31.00 | 16 | 12.4 |
| 23 | 0.00 | 76.2 | 76.1 | 30.90 | 18 | 12.4 |
| 24 | 0.00 | 76.1 | 76.0 | 30.50 | 18 | 12.4 |
|
| AVG | 0.00 | 76.0 | 75.9 | 31.10 | 16 | 12.4 |
|
| MAX | 0.00 | 76.2 | 76.1 | 31.70 | 18 | 12.4 |
| MIN | 0.00 | 75.7 | 75.8 | 30.50 | 15 | 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.