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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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Gilmerton Lift Bridge Replacement

| View Projects: Chesapeake, VA

  • Client:

    Virginia Department of Transportation
  • Service:

    Movable Bridges
  • Status:

  • Award Winner
  • Overview

    YouTube Clip:  Over the Top - Ingenuity for Rebuilding America

    Part of Military Highway, the Henry G. Gilmerton Bridge carries approximately one million travelers every month while also being the most frequently opened. The Virginia Department of Transportation (VDOT) recognized the need to replace the aging bridge to accommodate future growth in an area becoming increasingly congested, and to facilitate better flow of marine traffic.

    VDOT embarked on a $134 million replacement project requiring the new bridge to be built on the exact same alignment. M&M completed preliminary and final design of the new 250-foot long and 89-foot wide lift span – one of the widest lift spans ever. Due to the exceptional width, four 15-foot diameter sheaves were needed on each tower. Eight 12-foot diameter drilled shafts were designed to reach 120 feet below ground and are some of the largest ever constructed using the oscillating method. With only 25 feet between the Gilmerton Bridge and an adjacent railroad bridge, seismic instruments were used to monitor potential settlement of the railroad bridge foundations during installation of the new drilled shafts.

    The Gilmerton Bridge replacement is currently in the final phases of construction, and featured the float-in of the lift span using accelerated bridge construction methods. It is predicted that the new lift bridge, featuring an improved vertical clearance of 35 feet in the closed position, will see 40% fewer openings each year, easing traffic and marine congestion alike.
  • Description

    Tasks Performed
    • Replacement Structure – Design (Preliminary & Final)
    • Structural/Electrical/Mechanical Design
    Bridge Geometry
    • Length of Main Span - 250 feet
    • Vertical Clearance - 135 feet (35 feet when closed)
    • Lanes on Structure - Six lanes
  • Testimonial

    "This bridge will be built to accommodate the future needs of the region. Virginians are closer to having a new bridge that will make it easier for workers to get to their jobs and for businesses to deliver their goods and products." - Victor Mendez, FHWA Administrator
  • Credits

    Dr. John M. Kulicki, PE, SE (Principal In Charge)
    Lance V. Borden, PE (Project Manager)
    Michael C. Irwin, PE (Design Supervisor)
    Kevin W. Johns, PE (Deputy Project Manager)
    Earl L. Seibert (Structural Technician)
    Randy L. Reed (Electrical Technician)
    Elizabeth A. Sample, PE (Mechanical Engineer)
    Nicholas D. Theofanis (Structural Engineer)
    Adnan Kurtovic, PE (Structural Engineer)
    Donald L. Miller, PE (Mechanical Engineer)