Lake Braddock is a reservoir in the community of Burke in Fairfax County, Virginia, United States. Lake Braddock is created by an impoundment on a tributary stream of Pohick Creek, itself a tributary of the Potomac River.In 1969, the Fairfax County Board of Supervisors and the Northern Virginia Soil District signed contracts which allowed the construction of the dam impounding the tributary of the Pohick creek in Burke.