Tenmile Creek (Maryland)

[1] The headwaters of the stream originate in Thompsons Corner area of the county, about 2 miles (3.2 km) northwest of Clarksburg, and the creek flows south for about 2.5 miles (4.0 km), to Little Seneca Lake, a reservoir built on Little Seneca Creek.

The Tenmile Creek watershed is described as one of the highest-quality stream systems in Montgomery County, according to government studies.

However, the basin is bisected by an interstate highway, I-270, and in the late 1980s the county began planning for additional land development in the Clarksburg area.

[3]: 156–159  [6] A follow-up study found that after construction of several projects, water quality in the Little Seneca basin was degraded, despite the SPA requirements.

[7] In April 2014, the Montgomery County Council set additional limits on development projects in order to protect the quality of the creek and adjacent habitat.