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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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South Market Street Bascule Bridge Rehabilitation

| View Projects:USA Wilmington, DE

  • Client:

    Delaware Department of Transportation
  • Service:

    Movable Bridges
  • Status:

    Completed
  • Overview

    The South Market Street Bridge plays an important role in Wilmington’s past, present and future. This landmark bascule bridge, known officially as the John E. Reilly, Sr. Bridge, has seen heavy use carrying U.S. Route 13 traffic over the Christina River since it opened in 1927. When the Delaware Department of Transportation determined it was time to rehabilitate the aging structure, they also decided they needed a bridge design firm with both expertise in bascule bridge engineering and sensitivity to historic rehabilitation. They chose Modjeski and Masters.
     
    In addition to the engineering and design challenges, the bridge rehabilitation strategy had to meet several other criteria: it needed to adhere to both AASHTO and DelDOT standards, and it had to satisfy standards of the City of Wilmington’s urban renewal plans for the Christina River waterfront.   After a careful analysis of all requirements, we began to bring the historic movable bridge up to current– and projected future– standards.
     
    Modjeski and Masters provided both preliminary and final design services for structural, mechanical, and electrical rehabilitation. The project included complete replacement of the bridge operating machinery and electrical control system, structural steel repair and a seismic retrofit of the movable span. With our experience in highway/interchange design and engineering, we were able to provide recommendations for traffic control and staging, a detour, and approach roadway improvements. 
     
    By including many aesthetic enhancements, our bascule bridge design successfully accomplished all historic rehabilitation goals. We completed our work on the South Market Street Bridge project, knowing that it would continue to serve generations making the Christina River crossing.
  • Description

    Tasks Performed
    • Electrical/Mechanical Inspection & Rehabilitation
    • Rehabilitation Inspection
    • Rehabilitation – Design (Preliminary & Final)
    • Construction Engineering

    Bridge Geometry
    • Length of Movable Span – 229 feet
    • Total Project Length – 229 feet
    • Lanes on Structure – three lanes 
  • Testimonial

    In addition to the engineering and design challenges, the bridge rehabilitation strategy had to satisfy standards of the City of Wilmington’s urban renewal plans for the Christina River waterfront.
  • Credits

    Richard A. Martino, PE (Project Manager)
    John F. Bergman, PE (Deputy Project Manager)
    Lance V. Borden, PE (Lead Electrical Engineer)
    Jeffrey W. Newman, PE (Lead Mechanical Engineer)