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The Milton-Madison Bridge Project is a unique effort to replace the deteriorating US 421 Ohio River bridge between Milton, Ky., and Madison, Ind. The bridge is open to traffic.
Through the use of innovative design and construction methods, the bridge remains open during construction, with the exception of a few days. Using a method called “truss sliding,” a new 2,427-foot-long truss bridge will “slide” into place atop the existing piers, which are being strengthened and reused. The new bridge will open to traffic in 2013.
The second “big lift” for the Milton-Madison Bridge Project was completed in September 2012. Time-lapse footage (at right) shows the 15-hour operation during which a 727-foot section of the new bridge was floated and lifted into place onto temporary piers. The span which weighs 2,067 tons, or 4.1 million pounds, was lifted to a height of 90 feet on Sept. 10, using special hydraulic jacks and bundled strands of steel cable. The last step in the lift process involved the intricate placement of a massive beam under the new span. This beam will be used in 2013 when the entire truss bridge is slid from the temporary piers to the existing piers, which are being rehabbed and reused. The new bridge is expected to open to traffic in 2013.
With a live Web camera, traffic alerts and frequently updated project news MiltonMadisonBridge.com is the best place to follow construction progress. The construction photo gallery offers a close-up perspective on the project. Click on the “Contact” tab to ask questions or make comments about the project. We always respond promptly.
A 150-foot section of the Madison approach to bridge was demolished on April 25, 2012 using controlled explosives. (Watch the video) Once the section was removed, workers connected the temporary ramps to the existing bridge. Click here to see another angle.