Bonneville Dam & Lake on Columbia River
August 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 | 3526 | 147 | 96 | 120.70 | 122.70 | 31.10 | 79.20 | 76.00 | 75.70 | 11.60 | 64.10 | 11.60 | 3526 | 31.10 |
| 2 | 3583 | 149 | 96 | 122.20 | 123.20 | 31.50 | 79.30 | 76.00 | 75.80 | 11.60 | 64.20 | 11.60 | 3583 | 31.50 |
| 3 | 3577 | 149 | 96 | 119.00 | 117.00 | 31.10 | 73.50 | 76.10 | 76.00 | 11.10 | 64.90 | 11.00 | 3577 | 31.10 |
| 4 | 3530 | 147 | 96 | 122.00 | 125.00 | 31.10 | 81.50 | 75.80 | 75.60 | 11.50 | 64.10 | 11.40 | 3530 | 31.10 |
| 5 | 3508 | 146 | 96 | 124.00 | 124.00 | 30.80 | 80.80 | 75.70 | 75.50 | 11.40 | 64.10 | 11.40 | 3508 | 30.80 |
| 6 | 3730 | 155 | 96 | 129.90 | 129.90 | 33.10 | 84.40 | 75.70 | 75.20 | 11.90 | 63.30 | 11.90 | 2960 | 26.50 |
| 7 | 3853 | 161 | 96 | 127.50 | 125.50 | 33.80 | 79.30 | 76.00 | 75.60 | 11.60 | 64.00 | 11.70 | 2169 | 19.40 |
| 8 | 3511 | 146 | 96 | 123.80 | 123.80 | 31.00 | 80.40 | 75.80 | 75.60 | 11.70 | 63.90 | 11.70 | 3513 | 31.00 |
| 9 | 3521 | 147 | 96 | 123.00 | 122.00 | 31.10 | 78.50 | 76.10 | 75.60 | 11.70 | 63.90 | 11.60 | 3521 | 31.10 |
| 10 | 3551 | 148 | 96 | 114.20 | 119.20 | 31.20 | 75.60 | 75.60 | 75.60 | 11.50 | 64.10 | 11.40 | 3551 | 31.20 |
| 11 | 3506 | 146 | 96 | 116.70 | 118.70 | 31.10 | 75.20 | 75.30 | 75.20 | 11.40 | 63.80 | 11.40 | 3506 | 31.10 |
| 12 | 3633 | 151 | 96 | 117.00 | 109.00 | 31.80 | 64.80 | 76.20 | 75.40 | 10.90 | 64.50 | 10.80 | 3633 | 31.80 |
| 13 | 3652 | 152 | 96 | 113.10 | 113.10 | 31.80 | 68.90 | 76.20 | 76.00 | 11.10 | 64.90 | 11.10 | 3652 | 31.80 |
| 14 | 3617 | 151 | 96 | 111.10 | 114.10 | 31.60 | 70.10 | 75.90 | 75.90 | 11.30 | 64.60 | 11.30 | 3617 | 31.60 |
| 15 | 3611 | 150 | 96 | 119.20 | 114.20 | 31.60 | 70.20 | 76.50 | 75.70 | 11.30 | 64.40 | 11.20 | 3611 | 31.60 |
| 16 | 3639 | 152 | 96 | 111.60 | 118.60 | 31.90 | 74.30 | 75.70 | 75.80 | 11.50 | 64.30 | 11.50 | 3639 | 31.90 |
| 17 | | | | 113.80 | 110.80 | 31.10 | 67.30 | 76.00 | 75.80 | 10.80 | 65.00 | 10.70 | | 31.10 |
| 18 | | | | 111.00 | 111.00 | 30.90 | 67.70 | 76.00 | 75.80 | 10.70 | 65.10 | 10.60 | | 30.90 |
| 19 | | | | 114.10 | 112.10 | 31.10 | 68.60 | 76.30 | 75.90 | 10.60 | 65.30 | 10.50 | | 31.10 |
| 20 | | | | 115.40 | 116.40 | 31.00 | 73.00 | 76.10 | 75.90 | 10.90 | 65.00 | 10.80 | | 31.00 |
| 21 | | | | 116.10 | 118.10 | 31.40 | 74.30 | 75.90 | 75.70 | 11.10 | 64.60 | 11.00 | | 31.40 |
| 22 | | | | 113.30 | 114.30 | 31.30 | 70.60 | 75.80 | 75.40 | 10.80 | 64.60 | 10.70 | | 31.30 |
| 23 | | | | 97.00 | 104.00 | 30.90 | 60.70 | 75.20 | 75.50 | 10.00 | 65.50 | 9.80 | | 30.90 |
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| TOT | 57548 | | 1536 | | | | | | | | | | | |
| AVG | 3597 | 150 | 96 | 117.20 | 117.68 | 31.45 | 73.83 | 75.91 | 75.66 | 11.22 | 64.44 | 11.16 | 3444 | 30.53 |
|
| MAX | 3853 | | | 129.90 | 129.90 | 33.80 | 84.40 | 76.50 | 76.00 | 11.90 | 65.50 | 11.90 | 3652 | 31.90 |
| MIN | 3506 | | | 97.00 | 104.00 | 30.80 | 60.70 | 75.20 | 75.20 | 10.00 | 63.30 | 9.80 | 2169 | 19.40 |