Grand Coulee Dam
Tuesday August 4, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head |
|---|
| 1 | 66.70 | 66.70 | 0.00 | 1284.10 | 957.80 | 326.30 |
| 2 | 60.00 | 60.00 | 0.00 | 1284.10 | 957.00 | 327.10 |
| 3 | 55.70 | 55.70 | 0.00 | 1284.10 | 956.40 | 327.70 |
| 4 | 53.70 | 53.70 | 0.00 | 1284.10 | 956.10 | 328.00 |
| 5 | 54.00 | 54.00 | 0.00 | 1284.10 | 956.00 | 328.10 |
| 6 | 52.90 | 52.90 | 0.00 | 1284.20 | 955.60 | 328.60 |
| 7 | 54.80 | 54.80 | 0.00 | 1284.20 | 955.50 | 328.70 |
| 8 | 71.00 | 71.00 | 0.00 | 1284.20 | 956.40 | 327.80 |
| 9 | 68.50 | 68.50 | 0.00 | 1284.20 | 956.90 | 327.30 |
| 10 | 63.90 | 63.90 | 0.00 | 1284.20 | 955.60 | 328.60 |
| 11 | 59.00 | 59.00 | 0.00 | 1284.30 | 956.20 | 328.10 |
| 12 | 64.90 | 64.90 | 0.00 | 1284.20 | 957.80 | 326.40 |
| 13 | 85.20 | 85.20 | 0.00 | 1284.20 | 958.40 | 325.80 |
| 14 | 93.80 | 93.80 | 0.00 | 1284.20 | 958.80 | 325.40 |
| 15 | 141.30 | 141.30 | 0.00 | 1284.00 | 962.40 | 321.60 |
| 16 | 144.40 | 144.40 | 0.00 | 1284.00 | 964.10 | 319.90 |
| 17 | 155.50 | 155.50 | 0.00 | 1284.00 | 965.20 | 318.80 |
| 18 | 151.90 | 151.90 | 0.00 | 1283.90 | 965.40 | 318.50 |
| 19 | 148.10 | 148.10 | 0.00 | 1284.00 | 965.20 | 318.80 |
| 20 | 151.60 | 151.60 | 0.00 | 1283.90 | 965.40 | 318.50 |
| 21 | 126.20 | 126.20 | 0.00 | 1283.80 | 963.90 | 319.90 |
| 22 | 107.90 | 107.10 | 0.80 | 1283.80 | 962.00 | 321.80 |
| 23 | 91.80 | 91.70 | 0.10 | 1283.70 | 960.30 | 323.40 |
| 24 | 80.30 | 80.30 | 0.00 | 1283.70 | 959.00 | 324.70 |
|
| AVG | 91.80 | 91.76 | 0.04 | 1284.05 | 959.48 | 324.57 |
|
| MAX | 155.50 | 155.50 | 0.80 | 1284.30 | 965.40 | 328.70 |
| MIN | 52.90 | 52.90 | 0.00 | 1283.70 | 955.50 | 318.50 |