Flatiron removed and replaced the eastbound and westbound structures over the Weber River on I-80 at Mile Post 168.5, near Echo Junction, UT. The $5 million design-build project was Flatiron’s first Accelerated Bridge Construction project.

Accelerated Bridge Construction dramatically minimizes inconvenience to the public. In traditional construction, a bridge is partially or completely closed for weeks or months to allow for new construction, which often means traffic headaches for the public. With ABC, the highway remains open, closing for only a few hours, usually overnight, while the new bridge is moved into place.

Crews constructed a new bridge next to the existing bridges that needed replacement. Once the new structures were complete, in two separate operations, crews demolished each bridge and moved the new bridge into place. The new bridges are wider and longer than the older structures to accommodate 12 foot emergency lanes. Flatiron also made minor roadway improvements and widened the road to match the new width of the bridge. In addition, the project included installation of permanent barrier rail, backfilling and dressing slopes, installation of signage and lighting, and reshaping of the river channel.