New retail space on first floor of luxury apartment building at the corner of Route 1 and Backlick Rd. (Tulley Gate - the only entrance to Fort Belvoir that is open 24/7). Belvoir Square has 282 apartment units and 10,555 SF of retail space. Serves Fort Belvoir's 51,000 military and civilian employees There are over 100 defense agencies on the base, including: Fort Belvoir Community Hospital (3,200 employees) and National Geospatial Intelligence Agency (14,500 employees & 2.3M SF of office space).