After years of anticipation, St. Louis-area residents and travelers in the region are starting to see physical signs of the land bridge that will connect the Gateway Arch to the downtown area. The Missouri Department of Transportation (MoDOT) closed I-44 on Friday evening (July 11), as workers worked around the clock to erect 46 girders across the highway to serve as the base of the bridge. By Sunday evening all of the girders had been placed and the Interstate re-opened to traffic.
“We designed the main girders without splices to allow for quick placement. The exterior girders are just over 100 feet long, weigh 14 tons and were delivered to the job site in one piece,” said Josh Joliff, project engineer from Crawford, Murphy & Tilly (CMT.)
CMT is serving as project manager and design engineer for the Park Over the Highway portion of the CityArchRiver 2015 development program that will revitalize the downtown area. Minimizing impacts to traffic during construction has been a goal throughout the project.
“Stay-in-place forms are being utilized to form the deck slab. This allows the Interstate below to remain open during deck construction and provides a safe working platform for the workers,” Joliff added.
MoDOT expects to begin pouring concrete over the deck by the end of August. The structure is scheduled to be completed by the end of the year.
To learn more about Park Over the Highway and its progress, click here for the MoDOT project page.