Grand Coulee Dam
Sunday May 31, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Forebay Elevation | Tailwater Elevation | Average Head |
|---|
| 1 | 144.50 | 144.50 | 0.00 | 1272.90 | 964.60 | 308.30 |
| 2 | 134.70 | 134.70 | 0.00 | 1272.90 | 963.90 | 309.00 |
| 3 | 133.60 | 133.60 | 0.00 | 1273.00 | 963.30 | 309.70 |
| 4 | 128.40 | 128.40 | 0.00 | 1273.00 | 962.90 | 310.10 |
| 5 | 125.10 | 125.10 | 0.00 | 1273.10 | 962.60 | 310.50 |
| 6 | 128.30 | 128.30 | 0.00 | 1273.10 | 962.80 | 310.30 |
| 7 | 110.20 | 110.20 | 0.00 | 1273.20 | 961.50 | 311.70 |
| 8 | 108.30 | 108.30 | 0.00 | 1273.30 | 960.90 | 312.40 |
| 9 | 101.80 | 101.80 | 0.00 | 1273.40 | 960.30 | 313.10 |
| 10 | 102.20 | 102.20 | 0.00 | 1273.50 | 960.10 | 313.40 |
| 11 | 99.10 | 99.10 | 0.00 | 1273.60 | 959.70 | 313.90 |
| 12 | 95.50 | 95.50 | 0.00 | 1273.70 | 959.20 | 314.50 |
| 13 | 97.70 | 97.70 | 0.00 | 1273.80 | 959.00 | 314.80 |
| 14 | 96.40 | 96.40 | 0.00 | 1273.90 | 958.80 | 315.10 |
| 15 | 104.10 | 104.10 | 0.00 | 1274.00 | 959.20 | 314.80 |
| 16 | 109.60 | 109.60 | 0.00 | 1274.10 | 959.60 | 314.50 |
| 17 | 117.70 | 117.70 | 0.00 | 1274.10 | 960.40 | 313.70 |
| 18 | 129.90 | 129.90 | 0.00 | 1274.20 | 961.60 | 312.60 |
| 19 | 178.90 | 178.90 | 0.00 | 1274.10 | 966.00 | 308.10 |
| 20 | 187.40 | 187.40 | 0.00 | 1274.10 | 968.10 | 306.00 |
| 21 | 180.40 | 180.40 | 0.00 | 1274.30 | 968.00 | 306.30 |
| 22 | 179.90 | 179.90 | 0.00 | 1274.30 | 967.80 | 306.50 |
| 23 | 178.30 | 178.30 | 0.00 | 1274.30 | 967.80 | 306.50 |
| 24 | 173.30 | 173.30 | 0.00 | 1274.40 | 967.50 | 306.90 |
|
| AVG | 131.05 | 131.05 | 0.00 | 1273.68 | 962.73 | 310.95 |
|
| MAX | 187.40 | 187.40 | 0.00 | 1274.40 | 968.10 | 315.10 |
| MIN | 95.50 | 95.50 | 0.00 | 1272.90 | 958.80 | 306.00 |