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Countywide
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| Watershed Size | 465473.14 acres |
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| Length of Longest Branch of Creek | 34.57 miles |
| Total Channel Length in Watershed | 1349.63 miles |
| Average Annual Rainfall | 18.18 inches |
| Estimated Mean Daily Flow | 334.24 cfs |
| Estimated 100-Year Flood Flow | 25600 cfs* |
| Highest Elevation in Watershed | 3849 feet |
| Population (estimated) | 948800 people |
| Estimated Percent Impervious | 35.00% |
| Recognized Pollutants of Concern | Diazinon, Mercury & Metals |