From Deseret News archives:
Three million pounds in motion along Utah's I-80
Moving the first bridge to be installed along I-80 begins a process of leap-frog construction that will take place between 1300 East and State Street. For months, crews have been casting the decks for seven bridges that will replace existing structures at Highland Drive, 900 East, 700 East, 600 East, 500 East and 300 East. The movement and placement of the bridges will run through the first week of August, Utah Department of Transportation officials estimate.
Crews were expecting to have the first bridge in place over the weekend, but because of concerns about a bend in the carrying beam, the project was delayed. On Sunday afternoon, crews were welding additional supports to the beam. Today, UDOT is hoping to place the bridge across the gap and begin lowering it into place.
"We're playing it safe and handling things with care," said John Montoya, project manager for the site. "It's not worth the chance. There isn't a second one."
Montoya is expecting the bridge to be resting in its final location Tuesday. Soon after the bridge is placed, crews will begin buttressing the underside of the structure so it can support other bridges as they move over Highland Drive.
To move the structures from the bridge "farm" located along the 1300 East westbound onramp, crews are using accelerated bridge construction methods that are a first for the industry. Previous bridge replacements in the state have used similar steps in the process, but the scale of the project and new approach to placing bridges is gaining attention around the nation.
UDOT officials say that the benefits from these new technologies have reduced the overall congestion of traffic through the construction process and saved both time and money for the department.
To move structures that weigh between 2 million and 3 million pounds to their designated place along I-80, crews use a self-propelled modular transport system, Montoya said. It crawls under the bridge and uses a hydraulic lift system to raise the bridge about 10 feet off the ground so it can be moved to its destination.
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