The New Student's Reference Work/Delaware Bay
Del′aware Bay separates New Jersey and Delaware. Where it flows by Cape May and Cape Henlopen and joins the Atlantic, it is 15 miles broad, It is about 60 miles in length, to the entrance of Delaware River, and its greatest breadth is from 25 to 30 miles. The main channel is from 35 to 75 feet deep, and the largest vessels can sail to Philadelphia. A large breakwater, built by the government at Cape Henlopen, affords a safe harbor.