Bonneville Dam & Lake on Columbia River
October 2025
| Day of Month | Total Generation MWh | Average Generation MW | Station Use MWh | Inflow kcfs | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Midnight Reservoir Elevation | Average Forebay Elevation | Average Tailwater Elevation | Average Head feet | Project Average Tailwater | 2nd Powerhouse Total MWh | 2nd Powerhouse Flow kcfs |
|---|
| 1 | 8076 | 336 | 96 | 78.30 | 76.30 | 67.70 | 1.20 | 75.70 | 75.40 | 7.40 | 68.00 | 7.30 | 8076 | 67.70 |
| 2 | 9231 | 385 | 96 | 88.00 | 87.00 | 78.30 | 1.30 | 75.70 | 75.40 | 8.30 | 67.10 | 8.20 | 9231 | 78.30 |
| 3 | 8122 | 338 | 96 | 74.90 | 76.90 | 68.20 | 1.20 | 75.50 | 75.40 | 7.70 | 67.70 | 7.60 | 8122 | 68.20 |
| 4 | 8154 | 340 | 96 | 74.10 | 77.10 | 68.50 | 1.20 | 75.20 | 75.20 | 7.80 | 67.40 | 7.70 | 8154 | 68.50 |
| 5 | 9746 | 406 | 96 | 89.40 | 92.40 | 83.80 | 1.20 | 75.00 | 75.10 | 8.70 | 66.40 | 8.60 | 9746 | 83.80 |
| 6 | 9706 | 404 | 96 | 98.10 | 92.10 | 83.40 | 1.30 | 75.50 | 75.00 | 9.10 | 65.90 | 8.90 | 9706 | 83.40 |
| 7 | 9694 | 404 | 96 | 94.20 | 92.20 | 82.90 | 1.30 | 75.70 | 75.30 | 9.00 | 66.30 | 8.90 | 9694 | 82.90 |
| 8 | 9463 | 394 | 96 | 87.10 | 90.10 | 81.40 | 1.30 | 75.40 | 75.30 | 9.30 | 66.00 | 9.20 | 9463 | 81.40 |
| 9 | 9634 | 401 | 96 | 91.50 | 91.50 | 82.90 | 1.30 | 75.40 | 75.40 | 9.30 | 66.10 | 9.20 | 9634 | 82.90 |
| 10 | 11783 | 491 | 96 | 111.20 | 112.20 | 103.70 | 1.10 | 75.30 | 75.30 | 10.90 | 64.40 | 10.80 | 11783 | 103.70 |
| 11 | 8564 | 357 | 96 | 84.60 | 81.60 | 73.10 | 1.10 | 75.70 | 75.20 | 9.00 | 66.20 | 8.90 | 8564 | 73.10 |
| 12 | 8588 | 358 | 96 | 84.80 | 80.80 | 72.30 | 1.20 | 76.10 | 75.90 | 8.50 | 67.40 | 8.40 | 8588 | 72.30 |
| 13 | 11321 | 472 | 96 | 106.10 | 106.10 | 97.50 | 1.20 | 76.10 | 75.90 | 10.00 | 65.90 | 9.90 | 11321 | 97.50 |
| 14 | 11232 | 468 | 96 | 104.50 | 105.50 | 96.80 | 1.30 | 75.90 | 75.70 | 9.80 | 65.90 | 9.70 | 11232 | 96.80 |
| 15 | 11531 | 480 | 96 | 108.10 | 108.10 | 99.60 | 1.20 | 75.90 | 75.60 | 10.00 | 65.60 | 9.90 | 11220 | 96.90 |
| 16 | 10433 | 435 | 96 | 96.30 | 98.30 | 89.70 | 1.30 | 75.70 | 75.60 | 9.30 | 66.30 | 9.20 | 10433 | 89.70 |
| 17 | 10229 | 426 | 96 | 95.40 | 96.40 | 87.70 | 1.30 | 75.60 | 75.40 | 9.20 | 66.20 | 9.10 | 10229 | 87.70 |
| 18 | 9191 | 383 | 96 | 85.50 | 86.50 | 78.00 | 1.20 | 75.30 | 75.40 | 8.40 | 67.00 | 8.30 | 9191 | 78.00 |
| 19 | 9163 | 382 | 96 | 87.60 | 86.70 | 78.10 | 1.20 | 75.70 | 75.50 | 8.90 | 66.60 | 8.80 | 9163 | 78.10 |
| 20 | 9499 | 396 | 96 | 86.30 | 89.30 | 80.80 | 1.10 | 75.50 | 75.50 | 9.00 | 66.50 | 8.80 | 9499 | 80.80 |
| 21 | 9926 | 414 | 96 | 94.10 | 94.10 | 85.50 | 1.20 | 75.30 | 75.20 | 9.10 | 66.10 | 9.00 | 9926 | 85.50 |
| 22 | 9913 | 413 | 96 | 92.90 | 93.90 | 85.20 | 1.20 | 75.30 | 75.00 | 9.10 | 65.90 | 9.00 | 9913 | 85.20 |
| 23 | 10531 | 439 | 96 | 101.90 | 99.90 | 91.30 | 1.20 | 75.50 | 75.20 | 9.70 | 65.50 | 9.60 | 10531 | 91.30 |
| 24 | 10056 | 419 | 96 | 97.20 | 95.20 | 86.70 | 1.10 | 75.70 | 75.40 | 9.50 | 65.90 | 9.40 | 10056 | 86.70 |
| 25 | 10059 | 419 | 96 | 92.00 | 95.00 | 86.60 | 1.10 | 75.30 | 75.60 | 9.60 | 66.00 | 9.50 | 10059 | 86.60 |
| 26 | 9470 | 395 | 96 | 88.50 | 90.50 | 82.00 | 1.10 | 75.10 | 75.00 | 9.50 | 65.50 | 9.40 | 9470 | 82.00 |
| 27 | 9585 | 399 | 96 | 93.60 | 90.60 | 82.10 | 1.10 | 75.50 | 75.20 | 9.00 | 66.20 | 8.80 | 9585 | 82.10 |
| 28 | | | | 102.50 | 103.50 | 94.90 | 1.20 | 75.40 | 75.50 | 9.30 | 66.20 | 9.10 | | 94.90 |
| 29 | | | | 106.90 | 101.90 | 93.30 | 1.20 | 75.90 | 75.10 | 9.60 | 65.50 | 9.40 | | 93.30 |
| 30 | | | | 105.60 | 108.60 | 100.20 | 1.00 | 75.50 | 75.70 | 9.50 | 66.20 | 9.40 | | 95.90 |
| 31 | | | | 109.10 | 113.10 | 104.60 | 1.10 | 75.00 | 75.20 | 10.10 | 65.10 | 10.00 | | 97.00 |
|
| TOT | 262900 | | 2592 | | | | | | | | | | | |
| AVG | 9737 | 406 | 96 | 93.88 | 93.98 | 85.38 | 1.19 | 75.53 | 75.37 | 9.15 | 66.23 | 9.03 | 9726 | 84.91 |
|
| MAX | 11783 | | | 111.20 | 113.10 | 104.60 | 1.30 | 76.10 | 75.90 | 10.90 | 68.00 | 10.80 | 11783 | 103.70 |
| MIN | 8076 | | | 74.10 | 76.30 | 67.70 | 1.00 | 75.00 | 75.00 | 7.40 | 64.40 | 7.30 | 8076 | 67.70 |