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Upper Potomac Direct Watershed

Image of Upper Potomac Direct

The Upper Potomac Direct is located in rural western Montgomery County, and includes the subwatersheds of:

The combined drainage area of the portions of these subwatersheds that lie within Montgomery County is approximately 60 square miles.

Due to the generally well-drained underlying Triassic sandstone, the upland streams here tend to experience low baseflow during the summer months (not much water). This low baseflow affects habitat, and can cause a stream’s temperature to rise rapidly, which can lower the stream’s oxygen levels. All of these factors affect the life present in the stream.

Upper Potomac Direct Watershed Pre-Assessment (PDF, 7.14MB)




Map of Montgomery County with the Upper Potomac Direct watershed highlighted.