In advance of the widening of the intersection of Routes 234 and 29 at Manassas National Battlefield Park, the University of Maryland and the National Park Service conducted an archaeological survey in 1999 and 2000 in an effort to locate prehistoric or historic sites that would be impacted by construction.  Systematic placement of shovel test pits and excavation units allowed archaeologists to locate an early nineteenth-century slave quarter associated with the Hazel Plain plantation.  Since the quarters are about a mile from the main house, the enslaved people at the site probably worked in the fields.  Materials recovered from this quarter include colonoware, a low-fired earthenware often associated with enslaved African Americans.  Other materials from this site include European ceramics, glasswares, clothing and adornment items, and wine bottle glass.