Bonneville Dam
Monday November 9, 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 | 117.40 | 102.60 | 2.40 | 75.60 | 11.20 | 64.40 | 75.60 | 76.10 | 11.40 |
| 2 | 119.60 | 104.80 | 2.40 | 75.60 | 11.10 | 64.50 | 75.50 | 76.00 | 11.40 |
| 3 | 121.50 | 106.70 | 2.40 | 75.40 | 11.20 | 64.20 | 75.30 | 75.90 | 11.30 |
| 4 | 123.20 | 108.40 | 2.40 | 75.30 | 11.20 | 64.10 | 75.30 | 75.90 | 11.40 |
| 5 | 124.70 | 109.90 | 2.40 | 75.30 | 11.20 | 64.10 | 75.20 | 75.80 | 11.40 |
| 6 | 125.50 | 110.70 | 2.40 | 75.20 | 11.20 | 64.00 | 75.10 | 75.70 | 11.40 |
| 7 | 127.40 | 112.60 | 2.40 | 75.30 | 11.50 | 63.80 | 75.20 | 75.70 | 11.60 |
| 8 | 123.60 | 108.80 | 2.40 | 75.40 | 11.50 | 63.90 | 75.30 | 75.80 | 11.70 |
| 9 | 121.40 | 106.60 | 2.40 | 75.60 | 11.30 | 64.30 | 75.50 | 76.00 | 11.50 |
| 10 | | | | | | | | | |
| 11 | | | | | | | | | |
| 12 | 120.00 | 105.20 | 2.40 | 75.50 | 11.20 | 64.30 | 75.40 | 76.00 | 11.40 |
| 13 | 122.10 | 107.30 | 2.40 | 75.40 | 11.30 | 64.10 | 75.40 | 76.00 | 11.50 |
| 14 | 123.90 | 109.10 | 2.40 | 75.50 | 11.30 | 64.20 | 75.50 | 76.00 | 11.40 |
| 15 | 125.80 | 111.00 | 2.40 | 75.40 | 11.30 | 64.10 | 75.40 | 75.90 | 11.50 |
| 16 | 128.00 | 113.20 | 2.40 | 75.40 | 11.40 | 64.00 | 75.30 | 75.90 | 11.50 |
| 17 | 126.40 | 111.60 | 2.40 | 75.40 | 11.40 | 64.00 | 75.30 | 75.90 | 11.50 |
| 18 | 123.20 | 108.40 | 2.40 | 75.50 | 11.40 | 64.10 | 75.50 | 76.00 | 11.60 |
| 19 | | | | | | | | | |
| 20 | | | | | | | | | |
| 21 | | | | | | | | | |
| 22 | | | | | | | | | |
| 23 | | | | | | | | | |
| 24 | | | | | | | | | |
|
| AVG | 123.36 | 108.56 | 2.40 | 75.42 | 11.29 | 64.13 | 75.36 | 75.91 | 11.47 |
|
| MAX | 128.00 | 113.20 | 2.40 | 75.60 | 11.50 | 64.50 | 75.60 | 76.10 | 11.70 |
| MIN | 117.40 | 102.60 | 2.40 | 75.20 | 11.10 | 63.80 | 75.10 | 75.70 | 11.30 |
| |
Powerhouse 1 |
Powerhouse 2 |
Project |
| Hour | Generation Flow kcfs | Forebay Elevation | Forebay Elevation | Generation Flow kcfs | Spillway Gates in Use | Miscellaneous Flow kcfs* |
|---|
| 1 | 35.30 | 75.6 | 75.6 | 67.30 | 2 | 12.4 |
| 2 | 36.10 | 75.6 | 75.5 | 68.70 | 2 | 12.4 |
| 3 | 41.50 | 75.4 | 75.3 | 65.20 | 2 | 12.4 |
| 4 | 42.30 | 75.3 | 75.3 | 66.10 | 2 | 12.4 |
| 5 | 42.60 | 75.3 | 75.2 | 67.30 | 2 | 12.4 |
| 6 | 43.40 | 75.2 | 75.1 | 67.30 | 2 | 12.4 |
| 7 | 44.50 | 75.3 | 75.2 | 68.10 | 2 | 12.4 |
| 8 | 42.90 | 75.4 | 75.3 | 65.90 | 2 | 12.4 |
| 9 | 42.30 | 75.6 | 75.5 | 64.30 | 2 | 12.4 |
| 10 | | | | | | |
| 11 | | | | | | |
| 12 | 41.90 | 75.5 | 75.4 | 63.30 | 2 | 12.4 |
| 13 | 42.20 | 75.4 | 75.4 | 65.10 | 2 | 12.4 |
| 14 | 42.70 | 75.5 | 75.5 | 66.40 | 2 | 12.4 |
| 15 | 43.70 | 75.4 | 75.4 | 67.30 | 2 | 12.4 |
| 16 | 44.80 | 75.4 | 75.3 | 68.40 | 2 | 12.4 |
| 17 | 44.00 | 75.4 | 75.3 | 67.60 | 2 | 12.4 |
| 18 | 42.90 | 75.5 | 75.5 | 65.50 | 2 | 12.4 |
| 19 | | | | | | |
| 20 | | | | | | |
| 21 | | | | | | |
| 22 | | | | | | |
| 23 | | | | | | |
| 24 | | | | | | |
|
| AVG | 42.07 | 75.4 | 75.4 | 66.49 | 2 | 12.4 |
|
| MAX | 44.80 | 75.6 | 75.6 | 68.70 | 2 | 12.4 |
| MIN | 35.30 | 75.2 | 75.1 | 63.30 | 2 | 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.