The Straits of Mackinac Shipwreck Preserve are divided in two by a bridge spanning how long?
Mackinac Bridge The Mackinac Bridge ( ) is a suspension bridge spanning the Straits of Mackinac to connect the Upper and Lower Peninsulas of the U.S. state of Michigan. 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. The Mackinac Bridge is part of Interstate 75 and the Lakes Michigan and Huron components of the Great Lakes Circle Tours across the straits; it is also a segment of the U.S. North Country National Scenic Trail. The bridge connects the city of St. Ignace on the north end with the village of Mackinaw City on the south.
McClay's Twin Bridge (East) Maclay's Twin Bridge (East) is a historic multi-span stone arch bridge spanning a tributary of Conodoguinet Creek between Lurgan Township and Southampton Township in Franklin County, Pennsylvania. It is a 105 ft bridge, with two spans each measuring 20 ft long. It was constructed in 1827 and is a twin of McClay's Twin Bridge (West).