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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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Philadelphia Navy Yard Lift Bridge Rehabilitation

| View Projects: Philadelphia, PA

  • Client:

    Philadelphia Industrial Development Corporation
  • Service:

    Movable Bridges
  • Status:

  • Overview

    The history of the Philadelphia Navy Yard is the history of the American Navy. It outfitted the first American fleet in 1775 and constructed some of the U.S. battleships, including the New Jersey and Wisconsin. But despite two centuries of dedication to shipbuilding and technological innovation, the Navy Yard was closed in 1996 as part of an effort to reduce federal expenditures. With the exception of certain Navy-retained properties including the Reserve Basin, the ownership of the Navy Yard was transferred to the Philadelphia Authority for Industrial Development (PAID) in 2000 with the Philadelphia Industrial Development Corporation (PIDC) given the responsibility for planning and development. The master plan for the Navy Yard divides the property into a mixed use facility. A main focus of the planned development was to lure a modern commercial shipbuilder to the Navy Yard and retaining the vertical lift bridge at the mouth of the Reserve Basin would make the Navy Yard more attractive for this pursuit. However, the United States Coast Guard (USCG) deemed the bridge an unreasonable obstruction to navigation and-commissioned the alteration of the bridge to remove the feature(s) responsible for the obstruction.<br /> <br /> The PIDC and the USCG turned to a trusted leader in the design and rehabilitation of movable bridges &ndash; Modjeski and Masters (M&amp;M). Our highly experienced engineers completed a study and prepared a report which provided feasible and economical solutions for the alteration of the bridge. To improve navigation at the bridge, our problem-solvers developed a design to increase the vertical clearance from the existing 135 feet to 150 feet. Our report was well received and we continued with a $20 million structural, electrical and mechanical rehabilitation of the bridge.<br /> <br /> The $20 million rehabilitation project exceeded everyone&rsquo;s expectations. It helped secure Aker Philadelphia Shipyard, one of the most modern commercial shipbuilding and repair facilities in the United States, as the anchor for the industrial campus. And recently, staying true to our commitment beyond completion, M&amp;M was awarded the Year 2010 Biennial Inspection of the bridge. <br />
  • Description

    <b>Tasks Performed</b> <ul> <li>Rehabilitation - Design (Preliminary and Final)</li> <li>Electrical/Mechanical Inspection and Rehabilitation</li> <li>Structural Analysis</li> <li>Construction Engineering</li> <li>NBIS Inspection</li> <li>Electrical/Mechanical Inspection</li> <li>Gusset Plate Evaluation</li> <li>Load Capacity Rating</li> </ul> <b>Bridge Geometry </b> <ul> <li>Length of Lift Span &ndash; 240 feet</li> <li>Total Project Length &ndash; 406 feet</li> <li># Lanes on Structure &ndash; One lane in each direction</li> </ul>
  • Testimonial

    The $20 million rehabilitation of the bridge helped secure Aker Philadelphia Shipyard, one of the most modern commercial shipbuilding and repair facilities in the United States, as the anchor for the industrial campus.
  • Credits

    Leon K. Huang, PE (Principal-In-Charge)<br /> Jeffrey W. Newman, PE (Lead Mechanical Engineer)<br /> Lance V. Borden, PE (Lead Electrical Engineer)<br /> Michael C. Irwin, PE (Lead Structural Engineer)<br /> Richard A. Little, PE (Field Services Engineer)