Question: What was the length of the original span of the bridge which made ocean beaches on the Eastern Shore of Maryland more accessible to visitors from Washington, D.C.?
Sentence (from "Chesapeake Bay Bridge"): The original span, opened in 1952 and with a length of 4.3 mi , was the world's longest continuous over-water steel structure; the parallel span was added in 1973.
Relevant evidence: Yes