Bonneville Dam
Wednesday August 5, 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 | 124.70 | 31.30 | 81.00 | 75.70 | 11.70 | 64.00 | 75.60 | 76.20 | 11.80 |
| 2 | 124.70 | 31.40 | 80.90 | 75.60 | 11.80 | 63.80 | 75.50 | 76.10 | 11.80 |
| 3 | 124.70 | 31.40 | 80.90 | 75.60 | 11.80 | 63.80 | 75.50 | 76.10 | 11.80 |
| 4 | 124.50 | 31.20 | 80.90 | 75.50 | 11.90 | 63.60 | 75.40 | 76.00 | 11.90 |
| 5 | 124.60 | 31.30 | 80.90 | 75.50 | 11.70 | 63.80 | 75.40 | 75.90 | 11.70 |
| 6 | 124.30 | 31.10 | 80.80 | 75.40 | 11.70 | 63.70 | 75.30 | 75.90 | 11.60 |
| 7 | 124.00 | 30.80 | 80.80 | 75.40 | 11.50 | 63.90 | 75.30 | 75.90 | 11.60 |
| 8 | 122.60 | 29.40 | 80.80 | 75.40 | 11.40 | 64.00 | 75.20 | 75.80 | 11.30 |
| 9 | 123.40 | 30.30 | 80.70 | 75.40 | 11.40 | 64.00 | 75.20 | 75.80 | 11.40 |
| 10 | 123.60 | 30.60 | 80.60 | 75.30 | 11.40 | 63.90 | 75.00 | 75.70 | 11.40 |
| 11 | 123.60 | 30.60 | 80.60 | 75.40 | 11.40 | 64.00 | 75.20 | 75.80 | 11.30 |
| 12 | 123.30 | 30.30 | 80.60 | 75.30 | 11.30 | 64.00 | 75.10 | 75.80 | 11.30 |
| 13 | 123.50 | 30.50 | 80.60 | 75.30 | 11.30 | 64.00 | 75.10 | 75.80 | 11.30 |
| 14 | 123.60 | 30.70 | 80.50 | 75.30 | 11.40 | 63.90 | 75.20 | 75.70 | 11.30 |
| 15 | 123.40 | 30.40 | 80.60 | 75.30 | 11.30 | 64.00 | 75.20 | 75.80 | 11.30 |
| 16 | 123.50 | 30.50 | 80.60 | 75.20 | 11.30 | 63.90 | 75.20 | 75.80 | 11.40 |
| 17 | 123.50 | 30.60 | 80.50 | 75.30 | 11.40 | 63.90 | 75.20 | 75.80 | 11.30 |
| 18 | 123.80 | 30.80 | 80.60 | 75.40 | 11.30 | 64.10 | 75.30 | 75.90 | 11.30 |
| 19 | 124.10 | 31.00 | 80.70 | 75.50 | 11.30 | 64.20 | 75.40 | 76.00 | 11.20 |
| 20 | 124.30 | 31.10 | 80.80 | 75.70 | 11.20 | 64.50 | 75.60 | 76.10 | 11.20 |
| 21 | 124.90 | 31.50 | 81.00 | 75.80 | 11.20 | 64.60 | 75.70 | 76.30 | 11.10 |
| 22 | 124.80 | 31.30 | 81.10 | 75.90 | 11.20 | 64.70 | 75.80 | 76.40 | 11.20 |
| 23 | 124.80 | 31.20 | 81.20 | 75.90 | 11.30 | 64.60 | 75.80 | 76.40 | 11.20 |
| 24 | 124.00 | 30.60 | 81.00 | 75.70 | 11.50 | 64.20 | 75.70 | 76.20 | 11.40 |
|
| AVG | 124.01 | 30.83 | 80.78 | 75.49 | 11.45 | 64.05 | 75.37 | 75.97 | 11.42 |
|
| MAX | 124.90 | 31.50 | 81.20 | 75.90 | 11.90 | 64.70 | 75.80 | 76.40 | 11.90 |
| MIN | 122.60 | 29.40 | 80.50 | 75.20 | 11.20 | 63.60 | 75.00 | 75.70 | 11.10 |
| |
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 | 75.7 | 75.6 | 31.30 | 17 | 12.4 |
| 2 | 0.00 | 75.6 | 75.5 | 31.40 | 17 | 12.4 |
| 3 | 0.00 | 75.6 | 75.5 | 31.40 | 17 | 12.4 |
| 4 | 0.00 | 75.5 | 75.4 | 31.20 | 17 | 12.4 |
| 5 | 0.00 | 75.5 | 75.4 | 31.30 | 17 | 12.4 |
| 6 | 0.00 | 75.4 | 75.3 | 31.10 | 17 | 12.4 |
| 7 | 0.00 | 75.4 | 75.3 | 30.80 | 17 | 12.4 |
| 8 | 0.00 | 75.4 | 75.2 | 29.40 | 17 | 12.4 |
| 9 | 0.00 | 75.4 | 75.2 | 30.30 | 17 | 12.4 |
| 10 | 0.00 | 75.3 | 75.0 | 30.60 | 17 | 12.4 |
| 11 | 0.00 | 75.4 | 75.2 | 30.60 | 17 | 12.4 |
| 12 | 0.00 | 75.3 | 75.1 | 30.30 | 17 | 12.4 |
| 13 | 0.00 | 75.3 | 75.1 | 30.50 | 17 | 12.4 |
| 14 | 0.00 | 75.3 | 75.2 | 30.70 | 17 | 12.4 |
| 15 | 0.00 | 75.3 | 75.2 | 30.40 | 17 | 12.4 |
| 16 | 0.00 | 75.2 | 75.2 | 30.50 | 17 | 12.4 |
| 17 | 0.00 | 75.3 | 75.2 | 30.60 | 17 | 12.4 |
| 18 | 0.00 | 75.4 | 75.3 | 30.80 | 17 | 12.4 |
| 19 | 0.00 | 75.5 | 75.4 | 31.00 | 17 | 12.4 |
| 20 | 0.00 | 75.7 | 75.6 | 31.10 | 17 | 12.4 |
| 21 | 0.00 | 75.8 | 75.7 | 31.50 | 17 | 12.4 |
| 22 | 0.00 | 75.9 | 75.8 | 31.30 | 17 | 12.4 |
| 23 | 0.00 | 75.9 | 75.8 | 31.20 | 17 | 12.4 |
| 24 | 0.00 | 75.7 | 75.7 | 30.60 | 17 | 12.4 |
|
| AVG | 0.00 | 75.5 | 75.4 | 30.83 | 17 | 12.4 |
|
| MAX | 0.00 | 75.9 | 75.8 | 31.50 | 17 | 12.4 |
| MIN | 0.00 | 75.2 | 75.0 | 29.40 | 17 | 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.