Bonneville Dam
Friday July 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 | 163.40 | 54.10 | 96.90 | 76.10 | 15.10 | 61.00 | 76.10 | 76.80 | 15.20 |
| 2 | 162.30 | 53.10 | 96.80 | 76.00 | 15.00 | 61.00 | 75.90 | 76.70 | 15.10 |
| 3 | 162.30 | 53.20 | 96.70 | 76.00 | 15.00 | 61.00 | 75.90 | 76.70 | 15.00 |
| 4 | 162.40 | 53.30 | 96.70 | 76.10 | 15.00 | 61.10 | 76.00 | 76.80 | 15.00 |
| 5 | 162.40 | 53.20 | 96.80 | 76.10 | 14.90 | 61.20 | 76.00 | 76.80 | 15.00 |
| 6 | 162.90 | 53.70 | 96.80 | 76.00 | 14.80 | 61.20 | 75.90 | 76.70 | 14.90 |
| 7 | 163.90 | 54.90 | 96.60 | 76.00 | 14.90 | 61.10 | 75.90 | 76.70 | 14.90 |
| 8 | 164.40 | 55.40 | 96.60 | 75.90 | 15.00 | 60.90 | 75.80 | 76.70 | 14.90 |
| 9 | 164.90 | 55.90 | 96.60 | 75.90 | 15.00 | 60.90 | 75.80 | 76.60 | 15.00 |
| 10 | 164.80 | 55.90 | 96.50 | 75.90 | 14.90 | 61.00 | 75.80 | 76.60 | 15.00 |
| 11 | 164.70 | 55.90 | 96.40 | 75.70 | 15.10 | 60.60 | 75.70 | 76.50 | 15.20 |
| 12 | 164.70 | 56.00 | 96.30 | 75.70 | 15.00 | 60.70 | 75.70 | 76.50 | 15.10 |
| 13 | 164.60 | 55.90 | 96.30 | 75.70 | 15.00 | 60.70 | 75.60 | 76.50 | 15.10 |
| 14 | 164.90 | 56.20 | 96.30 | 75.60 | 15.00 | 60.60 | 75.50 | 76.40 | 15.00 |
| 15 | 164.50 | 55.90 | 96.20 | 75.50 | 14.90 | 60.60 | 75.50 | 76.40 | 15.00 |
| 16 | 165.20 | 56.60 | 96.20 | 75.40 | 15.00 | 60.40 | 75.30 | 76.30 | 15.00 |
| 17 | 178.60 | 70.30 | 95.90 | 75.20 | 15.50 | 59.70 | 75.20 | 76.10 | 15.60 |
| 18 | 180.30 | 72.10 | 95.80 | 74.90 | 16.00 | 58.90 | 74.80 | 76.00 | 16.10 |
| 19 | 195.20 | 87.20 | 95.60 | 74.90 | 16.30 | 58.60 | 74.80 | 75.90 | 16.30 |
| 20 | 195.90 | 87.90 | 95.60 | 75.20 | 16.30 | 58.90 | 75.10 | 76.10 | 16.30 |
| 21 | | | | | | | | | |
| 22 | | | | | | | | | |
| 23 | | | | | | | | | |
| 24 | | | | | | | | | |
|
| AVG | 168.62 | 59.84 | 96.38 | 75.69 | 15.19 | 60.51 | 75.61 | 76.49 | 15.23 |
|
| MAX | 195.90 | 87.90 | 96.90 | 76.10 | 16.30 | 61.20 | 76.10 | 76.80 | 16.30 |
| MIN | 162.30 | 53.10 | 95.60 | 74.90 | 14.80 | 58.60 | 74.80 | 75.90 | 14.90 |
| |
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 | 76.1 | 54.10 | 18 | 12.4 |
| 2 | 0.00 | 76.0 | 75.9 | 53.10 | 18 | 12.4 |
| 3 | 0.00 | 76.0 | 75.9 | 53.20 | 18 | 12.4 |
| 4 | 0.00 | 76.1 | 76.0 | 53.30 | 18 | 12.4 |
| 5 | 0.00 | 76.1 | 76.0 | 53.20 | 18 | 12.4 |
| 6 | 0.00 | 76.0 | 75.9 | 53.70 | 18 | 12.4 |
| 7 | 0.00 | 76.0 | 75.9 | 54.90 | 18 | 12.4 |
| 8 | 0.00 | 75.9 | 75.8 | 55.40 | 18 | 12.4 |
| 9 | 0.00 | 75.9 | 75.8 | 55.90 | 18 | 12.4 |
| 10 | 0.00 | 75.9 | 75.8 | 55.90 | 18 | 12.4 |
| 11 | 0.00 | 75.7 | 75.7 | 55.90 | 18 | 12.4 |
| 12 | 0.00 | 75.7 | 75.7 | 56.00 | 18 | 12.4 |
| 13 | 0.00 | 75.7 | 75.6 | 55.90 | 18 | 12.4 |
| 14 | 0.00 | 75.6 | 75.5 | 56.20 | 18 | 12.4 |
| 15 | 0.00 | 75.5 | 75.5 | 55.90 | 18 | 12.4 |
| 16 | 0.00 | 75.4 | 75.3 | 56.60 | 18 | 12.4 |
| 17 | 0.00 | 75.2 | 75.2 | 70.30 | 18 | 12.4 |
| 18 | 0.00 | 74.9 | 74.8 | 72.10 | 18 | 12.4 |
| 19 | 0.00 | 74.9 | 74.8 | 87.20 | 18 | 12.4 |
| 20 | 0.00 | 75.2 | 75.1 | 87.90 | 18 | 12.4 |
| 21 | | | | | | |
| 22 | | | | | | |
| 23 | | | | | | |
| 24 | | | | | | |
|
| AVG | 0.00 | 75.7 | 75.6 | 59.84 | 18 | 12.4 |
|
| MAX | 0.00 | 76.1 | 76.1 | 87.90 | 18 | 12.4 |
| MIN | 0.00 | 74.9 | 74.8 | 53.10 | 18 | 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.