Michigan Central Station ended in 1988.
Michigan Central Railroad ended in 1976.
Michigan Car Company ended in 1892.
Keithsburg Bridge Company ended in 1901.
Railroad Bridge Company ended in 1866.
Sibley Bridge Company ended in 1900.
Quincy Bridge Company ended in 1866.
Pee Dee Bridge Company ended in 1915.
Mercer County Bridge Company ended in 1885.
Detroit River Bridge Company ended in 1905.
Quincy Railroad Bridge Company ended in 1903.
The Mackinac Bridge connects the Upper and Lower Peninsulas of Michigan, across the Mackinac Straits. The Straits separate Lakes Michigan from Lake Huron. The bridge also connects the towns of St. Ignace on the north end to Mackinaw City on the south end.