 The Interstate Bridge was built in 1929 for $ 700 @,@ 000 ( equivalent to $ 13 @.@ 2 million in 2015 ) to carry US 41 over the Menominee River at the state line . This span replaced a series of bridges built to connect Marinette , Wisconsin , and Menominee , Michigan , across the river . The first bridge was built in 1865 with a second built in 1872 that was replaced in 1929 with the third bridge . This third crossing was 850 feet ( 259 m ) in length , consisting of eleven 80 @-@ foot ( 24 m ) spans . The bridge was rehabilitated in 1970 in a project that included widening the deck and replacing the guard rails . Another construction project in 1999 repaired the Michigan side and the slough bridge portion of the Wisconsin side of the structure ; the project closed the bridge for six months . 
