Bonneville Dam
Monday July 14, 2025
| 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 | 132.60 | 30.60 | 89.60 | 75.50 | 12.10 | 63.40 | 75.40 | 76.20 | 12.10 |
| 2 | 132.90 | 31.20 | 89.30 | 75.40 | 12.10 | 63.30 | 75.30 | 76.00 | 12.00 |
| 3 | 128.10 | 31.10 | 84.60 | 75.50 | 11.50 | 64.00 | 75.40 | 76.00 | 11.50 |
| 4 | 123.40 | 30.90 | 80.10 | 75.50 | 11.50 | 64.00 | 75.40 | 76.00 | 11.40 |
| 5 | 123.70 | 31.20 | 80.10 | 75.30 | 11.40 | 63.90 | 75.20 | 75.80 | 11.40 |
| 6 | 123.80 | 31.40 | 80.00 | 75.20 | 11.40 | 63.80 | 75.00 | 75.70 | 11.40 |
| 7 | 124.40 | 32.10 | 79.90 | 75.20 | 11.40 | 63.80 | 75.00 | 75.70 | 11.30 |
| 8 | 124.80 | 32.00 | 80.40 | 74.90 | 11.50 | 63.40 | 74.80 | 75.50 | 11.40 |
| 9 | 126.30 | 31.90 | 82.00 | 74.80 | 11.50 | 63.30 | 74.60 | 75.40 | 11.50 |
| 10 | 126.40 | 32.10 | 81.90 | 74.80 | 11.80 | 63.00 | 74.70 | 75.30 | 11.80 |
| 11 | 125.90 | 31.70 | 81.80 | 74.80 | 12.00 | 62.80 | 74.70 | 75.30 | 11.90 |
| 12 | 121.80 | 31.40 | 78.00 | 74.80 | 11.90 | 62.90 | 74.70 | 75.30 | 12.00 |
| 13 | 121.00 | 31.10 | 77.50 | 74.70 | 11.70 | 63.00 | 74.60 | 75.30 | 11.70 |
| 14 | 121.10 | 31.20 | 77.50 | 74.70 | 11.60 | 63.10 | 74.60 | 75.30 | 11.70 |
| 15 | | | | | | | | 75.20 | |
| 16 | | | | | | | | | |
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| 24 | | | | | | | | | |
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| AVG | 125.44 | 31.42 | 81.62 | 75.08 | 11.67 | 63.41 | 74.96 | 75.60 | 11.65 |
|
| MAX | 132.90 | 32.10 | 89.60 | 75.50 | 12.10 | 64.00 | 75.40 | 76.20 | 12.10 |
| MIN | 121.00 | 30.60 | 77.50 | 74.70 | 11.40 | 62.80 | 74.60 | 75.20 | 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 | 0.00 | 75.5 | 75.4 | 30.60 | 17 | 12.4 |
| 2 | 0.00 | 75.4 | 75.3 | 31.20 | 17 | 12.4 |
| 3 | 0.00 | 75.5 | 75.4 | 31.10 | 17 | 12.4 |
| 4 | 0.00 | 75.5 | 75.4 | 30.90 | 17 | 12.4 |
| 5 | 0.00 | 75.3 | 75.2 | 31.20 | 17 | 12.4 |
| 6 | 0.00 | 75.2 | 75.0 | 31.40 | 17 | 12.4 |
| 7 | 0.00 | 75.2 | 75.0 | 32.10 | 17 | 12.4 |
| 8 | 0.00 | 74.9 | 74.8 | 32.00 | 18 | 12.4 |
| 9 | 0.00 | 74.8 | 74.6 | 31.90 | 18 | 12.4 |
| 10 | 0.00 | 74.8 | 74.7 | 32.10 | 18 | 12.4 |
| 11 | 0.00 | 74.8 | 74.7 | 31.70 | 18 | 12.4 |
| 12 | 0.00 | 74.8 | 74.7 | 31.40 | 17 | 12.4 |
| 13 | 0.00 | 74.7 | 74.6 | 31.10 | 17 | 12.4 |
| 14 | 0.00 | 74.7 | 74.6 | 31.20 | 17 | 12.4 |
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|
| AVG | 0.00 | 75.1 | 75.0 | 31.42 | 17 | 12.4 |
|
| MAX | 0.00 | 75.5 | 75.4 | 32.10 | 18 | 12.4 |
| MIN | 0.00 | 74.7 | 74.6 | 30.60 | 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.