MADISON, Indiana – The new Milton-Madison Bridge opened to traffic yesterday, April 17, 2014, following the historic truss slide that took place last week.
On April 10, 2014, the bridge made history when its new steel truss superstructure was moved 55 feet from temporary bridge piers onto its permanent, rehabilitated piers using a technique called truss sliding. The 2,428-foot-long structure was slid along steel rails and plates into place, making it the longest bridge slide in North America.
The team of Walsh Construction, Burgess & Niple and Buckland & Taylor designed and constructed the new bridge using the innovative truss sliding technique.
The new bridge truss superstructure was constructed downstream of the existing bridge on temporary piers. While the new superstructure was being built, the existing bridge piers were encased in concrete, strengthened and modernized to current bridge standards. Once the pier rehabilitation was complete, the old bridge superstructure was demolished and the new truss superstructure was moved into place.
The truss sliding technique allowed traffic to be maintained across this important bi-state connection with minimal closures – a few weeks compared to the 365 days that were originally estimated. The technique also helped secure Federal funding which required the new bridge to be built on the same alignment as the existing span.
The Milton-Madison Bridge project has already received national recognition, including a 2012 Best of What’s New Award from Popular Science magazine and being named one of Roads & Bridges magazine’s Top 10 Bridge Projects in the country.
Click here for more information on the engineering of this historic truss slide.