The Blue Water Bridge is a twin-span international bridge across the St. Clair River that links Port Huron, Michigan, United States, and Point Edward, Ontario, Canada. The Blue Water Bridge connects Highway 402 in Ontario with both Interstate 69 (I-69) and Interstate 94 (I-94) in Michigan.The original span is a cantilever truss bridge with a total length of 6,178 feet (1,883 m) and a main span of 871 feet (265 m). The second, newer span is a continuous tied-arch bridge with a total length of 6,109 feet (1,862 m) and a main span of 922 feet (281 m).Together, the two bridges are the second-busiest commercial crossing between the United States and Canada, after the Ambassador Bridge at Detroit-Windsor. They are the fourth-busiest overall international crossing in Ontario in terms of total number of vehicles. Overall, in Canada, they are the third-busiest bridges after the Champlain Bridge, in Montreal, and the Ambassador Bridge. They also provide one of the four shortest routes of land travel between the Northeastern United States (particularly New England) and the central United States. The Blue Water Bridges are jointly owned and maintained by Canada and the United States: Federal Bridge Corporation, a Crown corporation of the Government of Canada, is in charge of the Canadian side, and the Michigan Department of Transportation (MDOT) is in charge of the U.S. side. A toll is charged to cross the bridges, which is used to pay for maintenance and operations.
