Challenges
  • The Connecticut Department of Transportation was looking for consultant that could help design a rehabilitation plan for the aging bridge constructed in 1942 over the Wilbur Cross Highway.
  • The existing 96-foot bridge is a two-span cast-in-place concrete rigid frame structure founded on spread footings. Bridge fascias consist of reinforced concrete parapets, spandrel walls, and wingwalls with a natural stone façade.
  • Being located over the Wilbur Cross Highway (CT Route 5/15).
  • Detours, traffic signalization and other maintenance and protection of traffic measures required careful planning during construction.
Solutions
  • To maintain at least 13’-7” of vertical clearance over all four Route 5/15 travel lanes. The parapet repairs occurred within a temporary form support system and debris shield.
  • The existing 8-inch gas main and a 10-inch public water main were relocated to the west side of the bridge.
  • In order to retain the original stone façade, the new parapet walls were constructed using existing ashlar stone masonry and ring stones on the exterior of the parapets.
  • Key design aspects included full and partial depth concrete deck patching, removal and replacement of pavement and concrete sidewalks above the frame deck, patching and waterproofing membrane of frame top, repairs to the underside of the frame arches, gas and water main relocation, new sidewalks and curbs, a pedestrian fence mounted on top of the parapet walls, removal of existing stone covered knee walls along curbs, and the reuse of stones from existing parapets and knee walls.
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