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Seneca Creek Watershed

Image of Seneca Creek The Seneca Creek watershed is the largest in Montgomery County with a drainage area of approximately 130 square miles. Seneca Creek originates near Damascus in the northwestern portion of the County.  It flows about 27 miles south, through the City of Gaithersburg, until it joins the Potomac River.  

The watershed includes some areas of steeply rolling topography, including portions of the Clarksburg Town Center and Clarksburg Special Protection Area.


The subwatersheds of Seneca Creek are:

Map of Montgomery County with the Great Seneca subwatershed highlighted
Great Seneca Subwatershed


Map of Montgomery County with the Dry Seneca and Little Seneca subwatersheds highlighted
Little Seneca and Dry Seneca Subwatersheds