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Scammell Bridge Replacement

Location:
Dover, NH
Completed:
1999

Scope of Work

Cianbro removed an existing 660 linear foot draw span bridge over the Bellamy River and replaced it with a 1,132 linear foot, 70 foot wide concrete bridge with 13 fixed spans.

Project Details

  • Demolished the existing draw span bridge and overhead counterweight, with a hydraulic hammer and excavator
  • Deployed an underwater hydraulic shear to remove the concrete piling
  • Constructed the westbound lane of the new bridge, switched traffic from the old structure to the new, and then constructed the eastbound lane
  • Drove 26 inch and 36-inch diameter pipe pile—filled and encased in concrete—to construct the bridge substructure
  • Constructed the superstructure with concrete AASHTO girders and a cast-in-place concrete deck
  • Installed nearly one mile of detailed concrete parapet walls
  • Constructed a new intersection with full traffic signals and new turnpike ramps.