SR 1001-A37 Freeport Road Bridge

This structure replacement project was located at the border of Sharpsburg Borough and O’Hara Township in Allegheny County.  SR 1001 (Freeport Road) is a heavily travelled east-west road with a traffic volume of 13,000 vehicles per day. The existing fracture-critical Freeport Road Bridge was considered structurally deficient and functionally obsolete. The bridge needed to be replaced to maintain a safe crossing over a single railroad spur operated by the Norfolk Southern Railway Company.

The bridge was situated immediately to the west of the Highland Park Bridge interchange, with the existing interchange ramps extending slightly onto the east end of the bridge. It became evident early in Preliminary Engineering that any replacement alternative would impact the Highland Park Bridge interchange.

Key project features included:

  • Coordinating with the railroad to reduce the bridge span at this location from 134 feet to 79 feet.
  • Implementing an engineered embankment to protect an adjacent business.
  • Utilizing innovative A+Bx bidding in order accelerate construction and reduce the length of the road closure.
  • Including temporary accommodations for pedestrians and a large gas line.

The project was completed in the Fall of 2018.

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Gibson-Thomas is a multi-discipline consulting engineering firm established in 1916 in Latrobe, Pennsylvania. Our past experience, key staff and commitment to total client satisfaction are the major factors that our clients consider when contracting with Gibson-Thomas.

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