Fast-track bridge replacement

On I-80, the old bridge was moved out via self-propelled modular transporters (SPMTs). To move the new bridge into place, operators drove the transporters under the new bridge, lifted the bridge off of the temporary abutments, drove it to the final location, and lowered it onto the new permanent abutments.

The old I-80 bridge prior to being moved. You can see the temporary abutment for the old bridge in the background.

The old I-80 bridge being moved.

On I-80, the old bridge is being moved onto a temporary abutment for demolition. In the background, two new bridges are waiting to be set in place.

UDOT’s bridge replacement project on State Route 66 over the Weber River incorporated an incentive/disincentive associated with the calculated user cost of a detour to the next bridge upstream (see page 36). The contractor built the new bridge at a different location and then used bridge-jacking with rollers to move it to the bridge site, thus minimizing the bridge closure time.

Workers check the rollers prior to moving the newly constructed SR-66 bridge to its permanent location.

A jack pulls the SR-66 bridge.

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