“Big X” was a complex $24M bridge project over the mainline Burlington Northern Santa Fe railroad tracks. Located near the University of Nebraska, these tracks presented a very dangerous situation for students who crossed regularly for campus access. At 1,200 feet long and 100 feet wide, this massive steel girder bridge spans five sets of tracks and included 60,000 square yards of paving across four lanes, sewers, and utilities. We completed construction within very tight work windows of no more than three hours each day due to the heavy train traffic. We were also able to re-sequence the project and fast-track critical activities, resulting in completion 11 months ahead of schedule. This project, along with three legs of elevated overpass completed under a separate contract, allowed the closing of two very busy at-grade railroad crossings, and created a new arterial for traffic.