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 | 3602 | 150 | 96 | 128.50 | 129.50 | 31.90 | 85.20 | 75.40 | 75.00 | 12.30 | 62.70 | 12.30 | 3602 | 31.90 |
| 14 | 3597 | 150 | 96 | 136.80 | 133.80 | 32.00 | 89.40 | 76.00 | 75.10 | 12.60 | 62.50 | 12.60 | 3597 | 32.00 |
| 15 | 3504 | 146 | 96 | 135.90 | 138.90 | 31.40 | 95.10 | 75.40 | 75.20 | 13.10 | 62.10 | 13.10 | 3504 | 31.40 |
| 16 | 3459 | 144 | 96 | 141.70 | 137.70 | 31.00 | 94.40 | 75.90 | 75.10 | 13.00 | 62.10 | 13.00 | 3459 | 31.00 |
| 17 | 3559 | 148 | 96 | 119.50 | 116.50 | 30.80 | 73.20 | 76.10 | 75.90 | 11.60 | 64.30 | 11.60 | 3559 | 30.80 |
| 18 | 3590 | 150 | 96 | 106.90 | 107.90 | 30.80 | 64.70 | 76.00 | 76.00 | 10.80 | 65.20 | 10.70 | 3590 | 30.80 |
| 19 | 3645 | 152 | 96 | 120.70 | 119.70 | 31.50 | 75.80 | 76.10 | 75.80 | 11.30 | 64.50 | 11.30 | 3645 | 31.50 |
| 20 | | | | 129.00 | 129.00 | 31.10 | 85.50 | 76.10 | 75.70 | 11.90 | 63.80 | 11.90 | | 31.10 |
| 21 | | | | 129.30 | 129.30 | 31.60 | 85.40 | 76.10 | 75.70 | 11.90 | 63.80 | 11.90 | | 31.60 |
| 22 | | | | 133.10 | 139.10 | 38.00 | 88.80 | 75.50 | 75.40 | 12.50 | 62.90 | 12.50 | | 38.00 |
| 23 | | | | 132.60 | 127.60 | 31.10 | 84.10 | 75.90 | 75.30 | 11.90 | 63.40 | 11.90 | | 31.10 |
| 24 | | | | 135.90 | 132.90 | 36.60 | 83.90 | 76.40 | 75.70 | 12.10 | 63.60 | 12.10 | | 36.60 |
| 25 | | | | 132.80 | 136.80 | 31.00 | 93.40 | 75.90 | 75.60 | 12.60 | 63.00 | 12.70 | | 31.00 |
| 26 | | | | 120.80 | 118.80 | 30.40 | 76.00 | 76.10 | 75.80 | 11.40 | 64.40 | 11.30 | | 30.40 |
| 27 | | | | | | | | | | | | | | |
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| 30 | | | | | | | | | | | | | | |
| 31 | | | | | | | | | | | | | | |
|
| TOT | 92334 | | 1824 | | | | | | | | | | | |
| AVG | 4860 | 202 | 96 | 142.75 | 142.37 | 41.06 | 88.92 | 75.74 | 75.43 | 13.08 | 62.35 | 13.08 | 4824 | 40.82 |
|
| MAX | 8554 | | | 194.00 | 189.00 | 80.60 | 96.30 | 76.40 | 76.00 | 16.30 | 65.20 | 16.30 | 8206 | 77.40 |
| MIN | 3459 | | | 106.90 | 107.90 | 30.40 | 64.70 | 75.10 | 75.00 | 10.80 | 58.90 | 10.70 | 3459 | 30.40 |