The new dual bridges span a wetland, river and three
railroad tracks. To maximize effi ciency of the bridge
design, the team chose a modifi ed 77-in.-deep bulb-tee,
prestressed concrete girder for all concrete spans. To
eliminate the need for bridge overhang falsework, the
team implemented a special “edge girder” that also served
as the formwork for the deck slab overhang. The team
discovered by slightly widening the median of the bridge
to 70 ft that a single work bridge could be constructed in
the center median, reducing project cost, timeframe and
environmental impacts.
