Which 6.8 mi tributary empties into the Potomac River at the Marine Corps Base Quantico's Air Station near Triangle, Virginia?
Chopawamsic Creek:  Chopawamsic Creek is formed by the confluence of the North and South Branches of Chopawamsic Creek and empties into the Potomac River south of Quantico at the Marine Corps Base Quantico's Air Station. Marine Corps Base Quantico: Marine Corps Base Quantico, also known as MCB Quantico, is a United States Marine Corps installation located near Triangle, Virginia, covering nearly 55148 acres of southern Prince William County, Virginia, northern Stafford County, and southeastern Fauquier County.
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