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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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back buttonMedium and Short Span Bridges

Big Conewago Creek Bridge Replacement

| View Projects: Strinestown, PA

  • Client:

    Pennsylvania Department of Transportation
  • Service:

    Medium and Short Span Bridges
  • Status:

    Completed
  • Overview

    Originally cleared by the Susquehanna Indian tribe, the “Susquehanna Trail” has been serving the region for centuries. Communities along the Susquehanna Trail have relied on this road to move crops and goods out of the area. Many bridges were later built along this road, including the Big Conewago Creek Bridge (also known as the "Ganoga Bridge" and the "Susquehanna Trail Bridge"). Built in 1926, the once-stately medium span bridge was a five span reinforced concrete arch bridge which carried thousands of vehicles daily between the 1920s and the 1950s. However, the construction of Interstate 83 replaced the old Susquehanna Trail as the main north-south thoroughfare in the county in the late 1950s. Consequently, as with most bridges, the condition of the Big Conewago Creek Bridge steadily declined over time.

    The Pennsylvania Department of Transportation (PennDOT) recognized the need to replace the medium span bridge and selected the trusted firm of Modjeski and Masters, to develop the preliminary and final design. Working with the public and affected stakeholders, our creative bridge engineers developed several design alternatives that blended aesthetics with PennDOT’s functional requirements. The selected replacement structure is a two-lane, three-span prestressed concrete I-beam bridge, on a new alignment. Our technical experts developed a comprehensive solution to meet current engineering standards and improve safety. Modjeski and Masters provided construction consultation services including review of fabrication details and answering construction-related questions.

    Construction for the medium span bridge replacement was completed within schedule at a cost that did not exceed our engineer’s estimate. We’ve helped maintain this important infrastructure link that will continue to serve the region for years to come and, in the process, stayed true to the Susquehanna Indian tribe’s intent to connect communities along the Susquehanna Trail.
  • Description

    Tasks Performed
    • Replacement Structure – Design (Preliminary & Final)
    • Highway/Interchange Design
    • Hydraulics & Hydrology
    • Scour Analysis
    • Drainage Improvements
    • Construction Support

    Bridge Geometry
    • Length of Main Span – 150 feet
    • Total Project Length – 450 feet
    • Lanes on Structure – Two lanes
  • Testimonial

    “…They have quality people, and anytime I ask them to look into things, they do a good job. I even feel like they go the extra mile sometimes.” - Mr. Baby Thottakara, PE, Project Manager, PennDOT
  • Credits

    John M. Kulicki, PhD, PE, SE (Principal-In-Charge)
    Scott R. Eshenaur, PE (Project Manager)
    Daniel E. McCaffrey, PE (Project Engineer)