Question: Which waterway, Chain of Rocks Lock or Dismal Swamp Canal, is the oldest continually operating man-made canal in the United States?
Sentence (from "Dismal Swamp Canal"): It is part of the Intracoastal Waterway, an inland route, which parallels the east coast and offers boaters shelter from the Atlantic Ocean from Manasquan Inlet, New Jersey, to Brownsville, Texas.
Relevant evidence: No