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.
Nærøysund Bridge The Nærøysund Bridge (Norwegian: "Nærøysund bru" ) is a suspension bridge that crosses the Nærøysundet strait between the islands of Marøya (in Nærøy) and Vikna in Nord-Trøndelag county, Norway. It is located about 1 km south of the village of Rørvik. Together with the Marøysund Bridge, it connects the islands of Vikna to the mainland. The Nærøysund Bridge is 701 m long, the main span is 325 m , and the maximum clearance to the sea is 41 m . The bridge has 17 spans. The Nærøysund Bridge was opened in 1981, when it briefly held the title of the world's longest cable-stay bridge.