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Big Conewago Creek Bridge Replacement

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Built in 1926, the once-stately medium span bridge, known as the Big Conewago Creek Bridge (also known as the "Ganoga Bridge" and the "Susquehanna Trail 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. After its steadily declined over time, PennDOT recognized the need to replace the medium span bridge.

Working with the public and affected stakeholders, Modjeski and Masters' (M&M) 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. M&M provided construction consultation services including review of fabrication details and answering construction-related questions.


Bridge Geometry
Length of Main Span 150 Feet
Total Project Length 450 feet
Lanes on Structure Two Lanes

…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