Grand Coulee Dam
Sunday June 21, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head |
|---|
| 1 | 108.60 | 108.60 | 0.00 | 1284.20 | 961.10 | 323.10 |
| 2 | 94.40 | 94.40 | 0.00 | 1284.20 | 960.30 | 323.90 |
| 3 | 82.50 | 82.50 | 0.00 | 1284.30 | 959.10 | 325.20 |
| 4 | 85.60 | 85.60 | 0.00 | 1284.30 | 959.10 | 325.20 |
| 5 | 83.80 | 83.80 | 0.00 | 1284.40 | 959.10 | 325.30 |
| 6 | 80.00 | 80.00 | 0.00 | 1284.40 | 958.90 | 325.50 |
| 7 | 69.60 | 69.60 | 0.00 | 1284.40 | 958.10 | 326.30 |
| 8 | 66.10 | 66.10 | 0.00 | 1284.50 | 957.50 | 327.00 |
| 9 | 70.70 | 70.70 | 0.00 | 1284.50 | 958.00 | 326.50 |
| 10 | 73.70 | 73.70 | 0.00 | 1284.60 | 958.80 | 325.80 |
| 11 | 74.40 | 74.40 | 0.00 | 1284.70 | 958.70 | 326.00 |
| 12 | 74.90 | 74.90 | 0.00 | 1284.70 | 958.60 | 326.10 |
| 13 | 82.30 | 82.30 | 0.00 | 1284.70 | 959.30 | 325.40 |
| 14 | 80.40 | 80.40 | 0.00 | 1284.80 | 959.40 | 325.40 |
| 15 | 81.60 | 81.60 | 0.00 | 1284.80 | 959.30 | 325.50 |
| 16 | 89.90 | 89.90 | 0.00 | 1284.90 | 959.80 | 325.10 |
| 17 | 112.30 | 112.30 | 0.00 | 1284.90 | 961.50 | 323.40 |
| 18 | 129.80 | 129.80 | 0.00 | 1284.90 | 963.10 | 321.80 |
| 19 | 135.10 | 135.10 | 0.00 | 1284.90 | 964.00 | 320.90 |
| 20 | 133.60 | 133.60 | 0.00 | 1284.90 | 964.10 | 320.80 |
| 21 | 138.10 | 138.10 | 0.00 | 1284.90 | 964.40 | 320.50 |
| 22 | 133.80 | 133.80 | 0.00 | 1285.00 | 964.20 | 320.80 |
| 23 | 123.20 | 123.20 | 0.00 | 1285.00 | 963.40 | 321.60 |
| 24 | 113.20 | 113.20 | 0.00 | 1285.00 | 962.40 | 322.60 |
|
| AVG | 96.57 | 96.57 | 0.00 | 1284.66 | 960.51 | 324.15 |
|
| MAX | 138.10 | 138.10 | 0.00 | 1285.00 | 964.40 | 327.00 |
| MIN | 66.10 | 66.10 | 0.00 | 1284.20 | 957.50 | 320.50 |