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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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Freeport Truss Bridge Rehabilitation

| View Projects: Freeport, PA

  • Client:

    Pennsylvania Department of Transportation
  • Service:

    Truss Bridges
  • Status:

    Completed
  • Award Winner
  • Overview

    The Freeport Bridge, also known as the Donald R. Lobaugh Bridge, was constructed in 1965 to carry PA Route 356 traffic over the Allegheny River and to connect the Freeport Borough area to Westmoreland County. The 1,074 foot long 3-span continuous truss with 1,369 foot of approach spans are a vital link in the Alle-Kiski Valley transportation corridor. Based primarily on the findings of a recent bridge inspection and years of heavy use, PennDOT decided that a major rehabilitation was necessary. They needed a firm with a proven portfolio of lifecycle truss bridge engineering experience. The choice was obvious – Modjeski and Masters.

    Our problem solvers commenced the rehabilitation process with an in-depth bridge inspection and 3-D structural analysis of the continuous trusses and gusset plate analyses. Our use of advanced structural analysis yielded findings that minimized the construction effort and impact on the traveling public.

    Next, Modjeski and Masters continued to provide preliminary engineering and final design services for rehabilitation and redecking of the truss spans and complete replacement of the North and South elevated approach spans. Our lifecycle solution included significant truss bridge rehabilitation design of the river spans, including: extensive truss member, crossbeam and floorbeam strengthening; gusset plate strengthening; seismic retrofits of truss bearings; and rocker bearing replacements. During the rehabilitation process, bi-directional traffic flow will be maintained at all times. Our experienced problem solvers are currently providing support services during the entire construction process.

    Our expertise in a full range of bridge engineering services helped PennDOT extend the life of this vital bridge while maintaining traffic flow at all times. Time and again, our clients place their trust in us to maintain their infrastructure. However, the Freeport Bridge rehabilitation project represents more than an update to a piece of transportation infrastructure; it strengthens the connection between communities, states and geographic regions.
  • Description

    Tasks Performed
    • Rehabilitation – Design (Preliminary & Final)
    • Highway/Interchange Design
    • Fatigue/Fracture Studies
    • NBIS Inspection
    • Gusset Plate Evaluation
    • Seismic Analysis

    Bridge Geometry
    • Length of Main Span – 452 feet
    • Total Project Length – 3,700 feet
    • Lanes on Structure – Four lanes plus a pedestrian sidewalk
  • Credits

    Todd B. McMeans, PE (Principal-In-Charge)
    Michael C. Irwin, PE (Project Manager)
    Christopher P. Ahlskog, PE (Lead Structural Engineer)
    Christopher W. Smith, PE (Lead Structural Engineer)
    Adnan Kurtovic, PE (Lead Structural Engineer)
    Lance V. Borden, PE (Lead Electrical Engineer)
    Betsy M. Reiner, PE (Gusset Plate Analyst)