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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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Northbound 14th Street Bridge Emergency Response

| Next Project View Projects: Washington, DC

  • Client:

    District Department of Transportation
  • Service:

    Emergency Response
  • Status:

    Completed
  • Overview

    The Northbound 14th Street Bridge, which carries Interstate 395 over the Potomac River, is a vital transportation link between Arlington, Virginia and the nation’s capital. On January 13, 1982 Air Florida Flight 90 crashed into the structure, resulting in 78 fatalities. One of those was passenger Arland Williams, who died saving others from the freezing water moments after the crash. The bridge was renamed the Arland D. Williams Jr. Memorial Bridge in 1983 to honor his heroic efforts.  During a routine bridge inspection by another consultant after the accident, severe deterioration in the metalwork of the movable span was observed. Modjeski and Masters was contacted immediately to provide bridge emergency response services.
     
    Within 24 hours our engineers were at the bridge to determine more precisely the condition of the metalwork. As a result of our observations, temporary supports were constructed immediately. At the same time, we developed and delivered repair details for implementation. First, we sent sketches to the District and the on-call contractor to give them an idea of the magnitude of the work, allowing the contractor to identify needed equipment and mobilize his forces. As more detailed drawings were developed, we sent them for implementation. Due to the urgency of the required repairs, we circumvented the usual procedures of developing contract documents. We developed the needed repairs so they could be constructed easily in a confined space. Our efforts were motivated by a goal shared by all participants: no more headlines about a tragedy at the Arland D. Williams Jr Memorial Bridge.  
     
    Our relationship with the District of Columbia Department of Transportation dates back to the early 1930s with our design of the Connecticut Avenue, Calvert Street and Chain Bridges. Today, we are the District’s consultant for the citywide bridge inspection contract which continues through 2010. Our services extend to all highway bridges in their inventory. We are also completing an assignment for the rehabilitation of the Northbound and Southbound 14th Street Bridges over the Potomac River as well as a redesign of the 16th Street Bridge over Military Road.  
  • Description

    Tasks Performed
    • Emergency Response and Engineering
    • In-Depth Inspection
    • Rehabilitation - Design (Preliminary and Final)
    • Construction Engineering
    Bridge Geometry
    • Typical Span Length – 165 feet
    • Total Project Length – 2,265 feet (southbound structure); 2,430 feet (northbound structure)
    • Lanes on Structure – four lanes (southbound structure); four lanes (northbound structure)
  • Testimonial

    Within 24 hours our engineers were at the bridge to determine more precisely the condition of the metalwork. As a result of our observations, temporary supports were constructed immediately. At the same time, we developed and delivered repair details for implementation.
  • Credits

    Leon K. Huang, PE (Principal In Charge)
    Dr. Wagdy G. Wassef, PE (Project Manager)
    Richard A. Little, PE (Field Services Manager)