The Cameron Run Watershed (CRW) is a highly urbanized, 44 square-mile watershed located in Northern Virginia. "The region is completely urbanized with nearly 95 percent of the watershed developed with mixed residential and commercial use".[1] Seventy-five percent of the watershed lies in Fairfax County, and the rest lies in Arlington County and the cities of Falls Church and Alexandria.
In addition to several streams, called “runs”, there are two lakes, Lake Barcroft (137 acres) and Fairview Lake (15 acres), and four ponds. There are eight sub-watersheds within the CRW.[2] The western part of the CRW lies within the Piedmont; the southeastern part in the Coastal Plain.