Bonneville Dam
Friday February 6, 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 | 169.40 | 165.90 | 0.00 | 73.30 | 15.40 | 57.90 | 73.40 | 74.30 | 15.10 |
| 2 | 169.40 | 165.90 | 0.00 | 73.30 | 15.50 | 57.80 | 73.40 | 74.30 | 15.10 |
| 3 | 169.40 | 165.90 | 0.00 | 73.20 | 15.30 | 57.90 | 73.40 | 74.30 | 15.10 |
| 4 | 169.20 | 165.70 | 0.00 | 73.20 | 15.30 | 57.90 | 73.30 | 74.20 | 15.00 |
| 5 | 169.00 | 165.50 | 0.00 | 73.20 | 15.30 | 57.90 | 73.30 | 74.20 | 15.00 |
| 6 | 169.60 | 166.10 | 0.00 | 73.10 | 15.30 | 57.80 | 73.30 | 74.20 | 15.00 |
| 7 | 169.10 | 165.00 | 0.60 | 73.30 | 15.20 | 58.10 | 73.40 | 74.30 | 14.90 |
| 8 | 170.20 | 165.60 | 1.10 | 73.40 | 15.20 | 58.20 | 73.40 | 74.30 | 14.90 |
| 9 | 169.60 | 165.00 | 1.10 | 73.30 | 15.30 | 58.00 | 73.50 | 74.30 | 15.00 |
| 10 | 170.00 | 165.40 | 1.10 | 73.50 | 15.40 | 58.10 | 73.50 | 74.30 | 15.10 |
| 11 | 170.60 | 166.00 | 1.10 | 73.50 | 15.50 | 58.00 | 73.60 | 74.50 | 15.30 |
| 12 | 170.00 | 165.40 | 1.10 | 73.20 | 15.50 | 57.70 | 73.30 | 74.40 | 15.30 |
| 13 | 171.20 | 166.60 | 1.10 | 73.20 | 15.60 | 57.60 | 73.40 | 74.30 | 15.40 |
| 14 | 171.50 | 166.90 | 1.10 | 73.20 | 15.60 | 57.60 | 73.30 | 74.20 | 15.30 |
| 15 | 171.20 | 166.60 | 1.10 | 73.10 | 15.60 | 57.50 | 73.30 | 74.20 | 15.30 |
| 16 | 172.00 | 167.40 | 1.10 | 73.00 | 15.60 | 57.40 | 73.20 | 74.10 | 15.40 |
| 17 | | | | | | | | | |
| 18 | | | | | | | | | |
| 19 | | | | | | | | | |
| 20 | | | | | | | | | |
| 21 | | | | | | | | | |
| 22 | | | | | | | | | |
| 23 | | | | | | | | | |
| 24 | | | | | | | | | |
|
| AVG | 170.09 | 165.93 | 0.66 | 73.25 | 15.41 | 57.84 | 73.38 | 74.27 | 15.14 |
|
| MAX | 172.00 | 167.40 | 1.10 | 73.50 | 15.60 | 58.20 | 73.60 | 74.50 | 15.40 |
| MIN | 169.00 | 165.00 | 0.00 | 73.00 | 15.20 | 57.40 | 73.20 | 74.10 | 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 | 78.70 | 73.3 | 73.4 | 87.20 | 0 | 3.5 |
| 2 | 78.80 | 73.3 | 73.4 | 87.10 | 0 | 3.5 |
| 3 | 79.00 | 73.2 | 73.4 | 86.90 | 0 | 3.5 |
| 4 | 78.90 | 73.2 | 73.3 | 86.80 | 0 | 3.5 |
| 5 | 78.90 | 73.2 | 73.3 | 86.60 | 0 | 3.5 |
| 6 | 79.10 | 73.1 | 73.3 | 87.00 | 0 | 3.5 |
| 7 | 78.40 | 73.3 | 73.4 | 86.60 | 1 | 3.5 |
| 8 | 77.80 | 73.4 | 73.4 | 87.80 | 1 | 3.5 |
| 9 | 77.70 | 73.3 | 73.5 | 87.30 | 1 | 3.5 |
| 10 | 78.20 | 73.5 | 73.5 | 87.20 | 1 | 3.5 |
| 11 | 78.10 | 73.5 | 73.6 | 87.90 | 1 | 3.5 |
| 12 | 78.00 | 73.2 | 73.3 | 87.40 | 1 | 3.5 |
| 13 | 77.90 | 73.2 | 73.4 | 88.70 | 1 | 3.5 |
| 14 | 78.20 | 73.2 | 73.3 | 88.70 | 1 | 3.5 |
| 15 | 77.50 | 73.1 | 73.3 | 89.10 | 1 | 3.5 |
| 16 | 78.10 | 73.0 | 73.2 | 89.30 | 1 | 3.5 |
| 17 | | | | | | |
| 18 | | | | | | |
| 19 | | | | | | |
| 20 | | | | | | |
| 21 | | | | | | |
| 22 | | | | | | |
| 23 | | | | | | |
| 24 | | | | | | |
|
| AVG | 78.33 | 73.2 | 73.4 | 87.60 | 1 | 3.5 |
|
| MAX | 79.10 | 73.5 | 73.6 | 89.30 | 1 | 3.5 |
| MIN | 77.50 | 73.0 | 73.2 | 86.60 | 0 | 3.5 |
* 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.