Bonneville Dam & Lake on Columbia River
July 2026
| 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 | 8554 | 356 | 96 | 194.00 | 189.00 | 80.60 | 95.90 | 75.60 | 75.20 | 16.30 | 58.90 | 16.30 | 8206 | 77.40 |
| 2 | 8091 | 337 | 96 | 188.40 | 184.40 | 75.70 | 96.20 | 76.00 | 75.60 | 16.00 | 59.60 | 16.00 | 7763 | 72.70 |
| 3 | 6973 | 291 | 96 | 167.10 | 173.10 | 64.30 | 96.30 | 75.40 | 75.60 | 15.40 | 60.20 | 15.40 | 6973 | 64.30 |
| 4 | 6811 | 284 | 96 | 168.50 | 171.50 | 63.40 | 95.80 | 75.20 | 75.10 | 15.30 | 59.80 | 15.30 | 6811 | 63.40 |
| 5 | 5262 | 219 | 96 | 160.00 | 156.00 | 47.80 | 95.80 | 75.50 | 75.10 | 14.10 | 61.00 | 14.10 | 5262 | 47.80 |
| 6 | 7032 | 293 | 96 | 169.30 | 173.30 | 64.90 | 95.90 | 75.10 | 75.20 | 15.00 | 60.20 | 15.10 | 7032 | 64.90 |
| 7 | 6191 | 258 | 96 | 167.60 | 164.60 | 57.10 | 95.20 | 75.40 | 75.30 | 14.70 | 60.60 | 14.70 | 6191 | 57.10 |
| 8 | 3614 | 151 | 96 | 139.30 | 139.30 | 32.40 | 94.50 | 75.30 | 75.20 | 13.10 | 62.10 | 13.10 | 3614 | 32.40 |
| 9 | 3468 | 144 | 96 | 143.60 | 137.60 | 30.90 | 94.30 | 76.00 | 75.00 | 12.60 | 62.40 | 12.60 | 3468 | 30.90 |
| 10 | 4314 | 180 | 96 | 142.90 | 145.90 | 38.50 | 95.00 | 75.70 | 75.80 | 13.30 | 62.50 | 13.30 | 4314 | 38.50 |
| 11 | 3524 | 147 | 96 | 138.40 | 138.40 | 31.30 | 94.80 | 75.60 | 75.50 | 12.80 | 62.70 | 12.90 | 3524 | 31.30 |
| 12 | 3544 | 148 | 96 | 129.00 | 131.00 | 31.40 | 87.20 | 75.50 | 75.20 | 12.40 | 62.80 | 12.40 | 3544 | 31.40 |
| 13 | | | | 128.50 | 129.50 | 31.90 | 85.20 | 75.40 | 75.00 | 12.30 | 62.70 | 12.30 | | 31.90 |
| 14 | | | | 136.80 | 133.80 | 32.00 | 89.40 | 76.00 | 75.10 | 12.60 | 62.50 | 12.60 | | 32.00 |
| 15 | | | | 135.90 | 138.90 | 31.40 | 95.10 | 75.40 | 75.20 | 13.10 | 62.10 | 13.10 | | 31.40 |
| 16 | | | | 141.70 | 137.70 | 31.00 | 94.40 | 75.90 | 75.10 | 13.00 | 62.10 | 13.00 | | 31.00 |
| 17 | | | | 119.50 | 116.50 | 30.80 | 73.20 | 76.10 | 75.90 | 11.60 | 64.30 | 11.60 | | 30.80 |
| 18 | | | | 106.90 | 107.90 | 30.80 | 64.70 | 76.00 | 76.00 | 10.80 | 65.20 | 10.70 | | 30.80 |
| 19 | | | | 120.70 | 119.70 | 31.50 | 75.80 | 76.10 | 75.80 | 11.30 | 64.50 | 11.30 | | 31.50 |
| 20 | | | | | | | | | | | | | | |
| 21 | | | | | | | | | | | | | | |
| 22 | | | | | | | | | | | | | | |
| 23 | | | | | | | | | | | | | | |
| 24 | | | | | | | | | | | | | | |
| 25 | | | | | | | | | | | | | | |
| 26 | | | | | | | | | | | | | | |
| 27 | | | | | | | | | | | | | | |
| 28 | | | | | | | | | | | | | | |
| 29 | | | | | | | | | | | | | | |
| 30 | | | | | | | | | | | | | | |
| 31 | | | | | | | | | | | | | | |
|
| TOT | 67378 | | 1152 | | | | | | | | | | | |
| AVG | 5615 | 234 | 96 | 147.27 | 146.74 | 44.09 | 90.25 | 75.64 | 75.36 | 13.46 | 61.91 | 13.46 | 5558 | 43.76 |
|
| MAX | 8554 | | | 194.00 | 189.00 | 80.60 | 96.30 | 76.10 | 76.00 | 16.30 | 65.20 | 16.30 | 8206 | 77.40 |
| MIN | 3468 | | | 106.90 | 107.90 | 30.80 | 64.70 | 75.10 | 75.00 | 10.80 | 58.90 | 10.70 | 3468 | 30.80 |