Bonneville Dam
Wednesday May 13, 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 | 224.20 | 60.20 | 151.60 | 75.60 | 18.70 | 56.90 | 75.50 | 76.80 | 18.70 |
| 2 | 224.20 | 60.30 | 151.50 | 75.60 | 18.70 | 56.90 | 75.50 | 76.80 | 18.70 |
| 3 | 224.60 | 60.60 | 151.60 | 75.70 | 18.60 | 57.10 | 75.50 | 76.80 | 18.60 |
| 4 | 224.90 | 60.80 | 151.70 | 75.80 | 18.70 | 57.10 | 75.60 | 76.90 | 18.70 |
| 5 | 224.40 | 60.30 | 151.70 | 75.90 | 18.70 | 57.20 | 75.70 | 77.00 | 18.70 |
| 6 | 224.80 | 60.60 | 151.80 | 75.80 | 18.70 | 57.10 | 75.60 | 76.90 | 18.80 |
| 7 | 233.90 | 70.20 | 151.30 | 75.40 | 19.20 | 56.20 | 75.30 | 76.70 | 19.20 |
| 8 | 221.90 | 57.80 | 151.70 | 76.00 | 18.70 | 57.30 | 75.50 | 76.80 | 18.80 |
| 9 | 220.80 | 56.40 | 152.00 | 76.00 | 18.70 | 57.30 | 75.80 | 77.10 | 18.80 |
| 10 | 220.30 | 55.80 | 152.10 | 76.00 | 18.70 | 57.30 | 75.80 | 77.10 | 18.70 |
| 11 | 220.20 | 55.80 | 152.00 | 76.00 | 18.60 | 57.40 | 75.80 | 77.10 | 18.70 |
| 12 | 220.50 | 56.10 | 152.00 | 76.00 | 18.60 | 57.40 | 75.80 | 77.10 | 18.60 |
| 13 | 220.00 | 55.70 | 151.90 | 75.90 | 18.60 | 57.30 | 75.80 | 77.10 | 18.70 |
| 14 | 220.30 | 56.00 | 151.90 | 76.00 | 18.50 | 57.50 | 75.80 | 77.00 | 18.60 |
| 15 | 220.10 | 55.60 | 152.10 | 76.10 | 18.50 | 57.60 | 76.00 | 77.30 | 18.70 |
| 16 | 221.30 | 56.60 | 152.30 | 76.10 | 18.70 | 57.40 | 75.80 | 77.30 | 18.80 |
| 17 | 240.00 | 75.70 | 151.90 | 75.90 | 19.30 | 56.60 | 75.70 | 77.20 | 19.40 |
| 18 | 244.80 | 80.60 | 151.80 | 75.90 | 19.60 | 56.30 | 75.70 | 77.20 | 19.60 |
| 19 | | | | | | | | | |
| 20 | | | | | | | | | |
| 21 | | | | | | | | | |
| 22 | | | | | | | | | |
| 23 | | | | | | | | | |
| 24 | | | | | | | | | |
|
| AVG | 225.07 | 60.84 | 151.83 | 75.87 | 18.77 | 57.11 | 75.68 | 77.01 | 18.82 |
|
| MAX | 244.80 | 80.60 | 152.30 | 76.10 | 19.60 | 57.60 | 76.00 | 77.30 | 19.60 |
| MIN | 220.00 | 55.60 | 151.30 | 75.40 | 18.50 | 56.20 | 75.30 | 76.70 | 18.60 |
| |
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 | 75.6 | 75.5 | 60.20 | 18 | 12.4 |
| 2 | 0.00 | 75.6 | 75.5 | 60.30 | 18 | 12.4 |
| 3 | 0.00 | 75.7 | 75.5 | 60.60 | 18 | 12.4 |
| 4 | 0.00 | 75.8 | 75.6 | 60.80 | 18 | 12.4 |
| 5 | 0.00 | 75.9 | 75.7 | 60.30 | 18 | 12.4 |
| 6 | 0.00 | 75.8 | 75.6 | 60.60 | 18 | 12.4 |
| 7 | 0.00 | 75.4 | 75.3 | 70.20 | 18 | 12.4 |
| 8 | 0.00 | 76.0 | 75.5 | 57.80 | 18 | 12.4 |
| 9 | 0.00 | 76.0 | 75.8 | 56.40 | 18 | 12.4 |
| 10 | 0.00 | 76.0 | 75.8 | 55.80 | 18 | 12.4 |
| 11 | 0.00 | 76.0 | 75.8 | 55.80 | 18 | 12.4 |
| 12 | 0.00 | 76.0 | 75.8 | 56.10 | 18 | 12.4 |
| 13 | 0.00 | 75.9 | 75.8 | 55.70 | 18 | 12.4 |
| 14 | 0.00 | 76.0 | 75.8 | 56.00 | 18 | 12.4 |
| 15 | 0.00 | 76.1 | 76.0 | 55.60 | 18 | 12.4 |
| 16 | 0.00 | 76.1 | 75.8 | 56.60 | 18 | 12.4 |
| 17 | 0.00 | 75.9 | 75.7 | 75.70 | 18 | 12.4 |
| 18 | 0.00 | 75.9 | 75.7 | 80.60 | 18 | 12.4 |
| 19 | | | | | | |
| 20 | | | | | | |
| 21 | | | | | | |
| 22 | | | | | | |
| 23 | | | | | | |
| 24 | | | | | | |
|
| AVG | 0.00 | 75.9 | 75.7 | 60.84 | 18 | 12.4 |
|
| MAX | 0.00 | 76.1 | 76.0 | 80.60 | 18 | 12.4 |
| MIN | 0.00 | 75.4 | 75.3 | 55.60 | 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.