Little Seneca Creek

Little Seneca Creek is an 14.0-mile-long (22.5 km) stream in Montgomery County, Maryland, roughly 18 miles (29 km) northwest of Washington, D.C.

The creek drains portions of Clarksburg, Germantown, and Boyds. It rises south of Damascus and flows southward about 4.8 miles (7.7 km) to Little Seneca Lake, a reservoir created by construction of a dam on the creek. The reservoir empties to the lower portion of the creek, which flows south about 6.6 miles (10.6 km) to Seneca Creek, which drains to the Potomac River and the Chesapeake Bay.

A portion of the creek below the lake is a cold water stream that supports wild rainbow and brown trout populations.

The creek and reservoir are a drinking water source as part of the Little Seneca system, an emergency water supply for the metropolitan Washington, D.C. area.

In 1994, the Montgomery County Council anticipated population growth in the Little Seneca watershed and imposed some restrictions on housing development and other new construction in part of the watershed, in order to preserve water quality before development accelerated. A "Special Protection Area" was designated that requires additional controls for stormwater runoff, beyond those required of all new projects.

...
Wikipedia