a depth of approximately five feet, and reopened for a short time before closing again, due to being inundated with duckweed. The duckweed clogs the intakes on power boats, quickly causing them to overheat. The Elizabeth River runs almost parallel to the canal, and was not affected by the 2016 flash flood, being much wider and much deeper than the canal. As of March 2018, the canal has been reopened by the U.S. Army Corps of Engineers. The ICW has remained open during all of this via the Elizabeth River and the North Landing River. The Virginia portion of the canal was located in Norfolk County, which today is the city of Chesapeake, where the northern portion of the canal at Deep Creek connects with the Southern Branch Elizabeth River. The southern end of the canal leads to the Albemarle Sound. The Dismal Swamp Canal Visitor Center is the only visitor center in the continental U. S. greeting visitors by both a major highway and a historic waterway. It is located in Camden County, North Carolina, on scenic U.S. Highway 17 three miles south of the Virginia/North Carolina border. The canal is listed on the National Register of Historic Places and has been designated a National Historic Civil Engineering Landmark. The historic canal is now recognized as part of the Underground Railroad and along with the Great Dismal Swamp, is noted as a former sanctuary for runaway slaves seeking freedom. The East Coast Greenway, a 3,000-mile long system of trails connecting Maine to Florida, runs along part of the Dismal Swamp Canal Trail. Boaters visiting the swamp in the Fall need to be very conscious of the level of duckweed clogging the waterway, which can clog water intakes on power boat engines and systems. See also Great Dismal Swamp National Wildlife Refuge Lake Drummond Albemarle and Chesapeake Canal List of canals in the United States References External links Great Dismal Swamp Canal megasite Dismal Swamp Canal Visitors Center Civil War Battlefield Guide; South Mills webpage US Army Corps of Engineers: Virtual Museum – Southern terminus – Northern terminus Canals on the National Register of Historic Places in Virginia Buildings and structures in Camden County, North Carolina Canals in Virginia Canals in North Carolina Canals on the National Register of Historic Places in North Carolina Intracoastal Waterway Virginia in the American Civil War North Carolina in the American Civil War Historic