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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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Macombs Dam Swing Bridge Rehabilitation

| View Projects:USA New York, NY

  • Client:

    New York City Department of Transportation
  • Service:

    Movable Bridges
  • Status:

  • Overview

    It is New York City’s oldest movable swing bridge. Only the George Washington and Brooklyn Bridges are older. Built in 1895, the existing bridge supersedes Robert Macomb’s 1814 Harlem River lock and dam, and its 1861 replacement bridge. Located in the shadows of Yankee Stadium, the historic Macombs Dam Bridge continues to serve as a vital connection for the Bronx and upper Manhattan. In recent times, the swing bridge was designated an official New York City landmark. And to ensure that the bridge remained in service and operational for years to come, the New York City Department of Transportation embarked on an ambitious multimillion dollar rehabilitation project. To help with this undertaking, City transportation officials sought a trusted design firm with a proven portfolio of swing bridge experience – they chose Modjeski and Masters.

    To begin, our experienced field personnel performed an in-depth structural, electrical and mechanical inspection of the swing span, the approach camelback truss over the Metro-North Railroad, deck truss over the CSX Railroad, and the viaducts over I-87. The entire bridge was then analyzed and load-rated by our technical experts. Next, Modjeski and Masters provided preliminary and final design for the rehabilitation of the structure, including redecking of the approach and main spans, and traffic signage and signal systems design. To maintain the bridge’s iconic status, details to restore original decorative aesthetics were carefully incorporated into the final design.

    During construction, Modjeski and Masters developed an innovative means of keeping the project on schedule. A shop drawing database was developed to track the checking and approval details. This database contained over 8,000 records with over 50 data entries associated with each record. And to ensure that fan-faithful visitors to Yankee Stadium would not be impacted, a construction work schedule was developed around the Yankees baseball season. As active partners, Modjeski and Masters successfully worked with the City and local stakeholders to help breathe new life back into the historic swing bridge. It’s part of what we do best – we help build and maintain great bridges.
  • Description

    Tasks Performed
    • In-depth Structural/Electrical/Mechanical Inspection
    • Structural/Electrical/Mechanical Rehabilitation
    • Construction Support & Inspection
    • Load Capacity Rating
    • Instrumentation and Testing

    Bridge Geometry
    • Main Span – 415-ft.
    • Total Length – 2,540-ft.
    • Lanes on Structure – Four lanes , two sidewalks
  • Testimonial

    As active partners, Modjeski and Masters successfully worked with the City and local stakeholders to help breathe new life back into the historic swing bridge.
  • Credits

    Leon K. Huang, PE (Principal-In-Charge)
    Lance V. Borden, PE (Project Manager | Electrical Lead)
    Jeffrey W. Newman, PE (Mechanical Lead)
    Nancy E. Kauhl, PE (Project Engineer)
    Christopher P. Ahlskog, PE (Project Engineer)
    John L. McKenney, PE (Resident Engineer)

    Photography by Mario Burger