Located on 3,228 acres (approximately 5 square miles) in Charles County, Maryland, at the confluence of the Potomac River and the Mattawoman Creek, NSF Indian head is approximately 30 miles from Washington, DC. NSF Indian Head contains about 1,591 temporary and permanent buildings occupying over 4.1 million square feet, and has approximately 127 miles of road. NSF Indian Head is under the control of Naval Support Activity (NSA) South Potomac, which was established in 2005 as a component of Naval District Washington, and is home to several Navy commands, including the Naval Surface Warfare Center, Indian Head Division (IHDIV, NSWC), Naval Ordnance Safety and Security Activity (NOSSA), Naval Explosive Ordnance Disposal Technology Division (EODTECHDIV), Naval Sea Logistics Center, Detachment Indian Head (SEALOG), Joint Interoperability Test Command (JITC), and U.S. Marine Corps Chemical Biological Incident Response Force (CBIRF). As the base landlord at NSF Indian Head and NSF Dahlgren, NSASP provides management functions for all supported commands, as well as personnel support (Morale, Welfare and Recreation and child care), facility support (Public Works), public safety (physical security, law enforcement, fire department), environmental and waste management, supply (materials management, property disposal, and warehousing) and public affairs.