The Straits of Mackinac Shipwreck Preserve are divided in two by a bridge spanning how long?
Straits of Mackinac Shipwreck Preserve:  The preserve is divided in two by the Mackinac Bridge. Mackinac Bridge:  Opened in 1957, the 26372 ft bridge (familiarly known as "Big Mac" and "Mighty Mac") is the world's 19th-longest main span and the longest suspension bridge between anchorages in the Western Hemisphere.
26372 ft