Modjeski and Masters was retained by the Pennsylvania Department of Transportation to design a replacement bridge for the existing Passyunk Avenue Bridge. The existing bascule bridge had been in service since 1911 but could no longer meet the demands of traffic in the area. We determined that a newer double-leaf bascule bridge would better serve the vehicular and marine traffic.
Construction would start in 1981 on the new bridge substructure. This included nearly 4,000-feet of elevated approach structures, roadways, and intersection improvements. Shown here is construction progress on the bascule pier as of early 1981.
With construction on the substructure units completed, work started on the bridge superstructure. Shown here is the lift-in operation of one of the bascule leaves in April 1982. Notice the existing Passyunk Avenue Bridge is still in operation in the background.
The New Passyunk Avenue Bridge is completed and opened to traffic in early 1983. The bridge is one of only 3 movable highway bridges located entirely within the state of Pennsylvania and is the last new movable bridge built in the state.
Modjeski and Masters was asked to provide PennDOT with a comprehensive structural, mechanical, and electrical peer review for the recent rehabilitation project. Our services ensured that any design errors were addressed before construction commenced.