Posted July 25, 201311 yr Milton-Madison Bridge's Main Span Demolished The Milton-Madison Bridge connects Milton, Kentucky to Madison, Indiana and carries US 421 over the Ohio River. The historic two-lane Cantilever was rehabilitated in 1997, but was deemed to be in poor structural condition by 2006. Rehabilitation options were considered for the crossing, which would have extended the life of the bridge another ten years before needing additional work. Ultimately, the Kentucky Transportation Cabinet (KYTC) and the Indiana Department of Transportation (INDOT) agreed to replace the aging span in the summer of 2008. A construction contract was awarded to Walsh Construction for $103.9 million in September 2010 and ground was broken on November 30. Construction began two months later which involved strengthening the existing piers and constructing temporary approach spans to allow for the replacement of the original approaches. Construction on a 600-f00t truss began along the banks of the river, and was floated upstream and lifted into place onto temporary piers adjacent to the existing bridge. A second truss, 727-foot long, was then constructed and lifted onto temporary piers. The remaining components for the bridge were constructed on top of the temporary piers using conventional cranes. Traffic was rerouted onto the new bridge via temporary ramps in April 2012, and on June 3, 2013, vehicles were switched to the new trusses, allowing for the removal of the bridge decks on the old spans. On July 23, a 700-foot span over the main navigational channel was demolished with small explosive charges from Advanced Explosives Demolition. The use of temporary piers and ramps will lead to a total bridge closure time of less than ten days, less than an earlier projected closure date of one year. The new bridge, which will include a pedestrian sidewalk and bike lanes, is expected to open by September 2013. Below: The demolition of the main span of the Milton-Madison Bridge on July 23. More on the Milton-Madison Bridge »
July 25, 201311 yr Well, that's that. "You don't just walk into a bar and mix it up by calling a girl fat" - buildingcincinnati speaking about new forumers
July 25, 201311 yr Nice photos! Was that last piece supposed to break off or was that intentional to keep the steel from sinking/floating away?
July 25, 201311 yr I believe it was supposed to break off, but it's a fairly easy sheering job for that. The cleanup took less than 24 hours, which is amazing. There are six more blasts to occur.
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