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Life-Cycle Engineering Services | EXPANDED

Modjeski and Masters is pleased to announce the acquisition of structural engineering firm Summit Engineering Group, Inc. Our combined engineering prowess and respective technical skillsets will enable us to provide streamlined design and construction solutions to best meet client needs.

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back buttonMedium and Short Span Bridges

Stonington Railroad Bridge Accelerated Construction

| Stonington, CT

  • Client:

    Amtrak
  • Service:

    Medium and Short Span Bridges
  • Status:

    Completed
  • Overview

    YouTube Clip: The Fast Track - Rolling-In A Lasting Impression

    As a critical link along Amtrak’s Northeast Corridor, Stonington harbor lays claim to two century-old single span bridges on a causeway that were in need of replacement. Amtrak faced a unique challenge with these bridges because they needed to be replaced with minimal disruption to rail traffic while also being sensitive to the needs of the community. Amtrak sought a firm with proven experience who could meet these challenges. They found the answer in their long-term partner, Modjeski and Masters (M&M).

    M&M determined that the most cost effective and efficient way to replace both bridges was to use a “Roll-Out/Roll-In” accelerated construction technique. This required the new M&M-designed thru-girder superstructures to be constructed on temporary rail platforms parallel to the existing bridges. Once substructure modifications were completed, the old bridges’ superstructures were “rolled-out” and the new ones were “rolled-in” successfully with minimal rail traffic outage.

    M&M’s superstructure design brought an added benefit to the community –the shallow depth of the replacement structure provided a slight increase in vertical clearance. This allowed a new class of boats to pass underneath the bridges, thereby driving new business to local docks and growing the local economy. Ultimately, we helped Amtrak improve the end user experience of the travelling public and the local citizenry for years to come.
  • Description

    Tasks Performed
    • Replacement Structure – Design (Preliminary & Final)
    • Railroad Services
    • Accelerated Bridge Construction
    • Structural Analysis
    • Construction Support

    Bridge Geometry
    • Length of Main Span – 98 feet (East Br.), 86 feet (West Br.)
    • Total Project Length – 975 feet
    • Tracks on Structures – 2 tracks
  • Testimonial

    “Modjeski and Masters was the only design engineering firm that came down and spent time with the community." - Bryan Chesebrough, Bridge Proponent
  • Credits

    Todd McMeans, PE (Project Principal)
    Chad Clancy, PE (Project Manager)
    Kurtovic, Adnan, PE (Lead Design Engineer)
    Smith, Christopher, PE (Design Engineer)
    Michael Irwin, PE (Technical Advisor)
    Kevin Johns, PE (Technical Advisor)