Pennsylvania Turnpike Total Roadway Reconstruction

This project consists of the design for the total reconstruction of the Pennsylvania Turnpike Mainline between Milepost 199.3 to 213.83 in Franklin and Cumberland Counties.  As a subconsultant to KCI Technologies, Inc., Gibson-Thomas provided hydrologic & hydraulic analysis and stream surveys for 25 structures; 3 stream relocation designs, drainage design; stormwater management design; erosion & sedimentation control plan preparation; PADEP joint permit and NPDEPS permit preparation for 7 miles of roadway; structural design for the extension or replacement of 20 reinforced concrete arch culverts and one slab bridge; DARWin pavement design and utility coordination for the 15 miles of roadway reconstruction.  The existing 10-foot median was reconstructed to 46 feet to incorporate a 3rd travel lane in each direction.  The last section Milepost 201.74 to Milepost 206.89 is currently under construction.


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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.

Corporate Office
    • 1004 Ligonier Street
      Latrobe, PA 15650
    • P: 724-539-8562
Pennsylvania Offices
  • Fayette Office
    • Lemont Furnace, PA
    • P: 724-323-8020
  • Harrisburg Office
    • Camp Hill, PA
    • P: 717-612-9880
  • Indiana Office
    • Indiana, PA
    • P: 724-471-2246
  • Pittsburgh Office
    • Wexford, PA
    • P: 724-935-8188
  • Washington Office
    • Eighty Four, PA
    • P: 724-249-2603
Florida Office
    • Fort Myers, FL
    • P: 239-776-2908