 The Steel Bridge is still in place over the Dead River and previously carried CR 510 as the successor to M @-@ 35 in northern Marquette County . It survived a May 15 , 2003 , flood caused by the breaching of the Silver Lake Dam . The Marquette County Road Commission had announced plans in 2006 to bypass the structure with a modern replacement , leaving the existing bridge as a footpath or bike path . Construction on the bypass road and replacement bridge began in October 2007 . The concrete work for the replacement span was started in late 2009 , with an original projected completion date of November 1 , 2010 . The new crossing is 100 feet ( 30 m ) above river level compared to the 10 feet ( 3 @.@ 0 m ) for the 1921 span . The total budget for bridge construction was $ 4 @.@ 5 million and an additional $ 1 @.@ 7 million for the approach work , with an 80 @-@ percent federal , 15 @-@ percent state and 5 @-@ percent county funding split . The new bridge opened to traffic in September 2010 , diverting traffic from the Steel Bridge . Completion of the new span came after about a decade of planning . 
