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Willow Creek and Coastal Drainages
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| Watershed Size | 16062.83 acres |
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| Length of Longest Branch of Creek | 6.16 miles |
| Total Channel Length in Watershed | 44.78 miles |
| Average Annual Rainfall | 13.73 inches |
| Estimated Mean Daily Flow | 11.17 cfs |
| Estimated 100-Year Flood Flow | N/A cfs* |
| Highest Elevation in Watershed | 1438 feet |
| Population (estimated) | 58800 people |
| Estimated Percent Impervious | 25.00% |
| Recognized Pollutants of Concern | N/A |