Intracoastal Waterway. New Jersey Intracoastal Waterway, letter submitting report on survey of New Jersey Intracoastal Waterway from Shrewsbury River to Delaware Bay above Cape May via Manasquan-Barnegat Canal and includiug entrance through Barnegat Inlet, and waterway across Cape May County, N. J., to connect New Jersey State inland waterway with Delaware Bay.