Bridge Rehabilitation and Replacement

SAI was responsible for the in-depth inspection and analysis; preliminary and final design of bridge rehabilitation; consultation during construction; and shop drawing review. SAI, working with PennDOT District 9-0, has right-sized this project to a bridge rehabilitation project instead of the bridge replacement/widening project it was previously scoped for. SAI performed detailed analysis of the substructure units along with performing an in-depth inspection to show that the existing structure is capable of supporting the heavier permanent loads than what it was designed for. This resulted in substantial construction savings and design cost savings, as well as advancing the project to construction two years sooner, which will also result in a cost savings to the Department.

Physical Features: 
  • 1,000' five-span two-girder bridge over the Juniata River, Norfolk & Southern Railroad Mainline, and S.R. 1010.
Other Features: 
  • In-depth inspection and load ratings.
  • Redecking and minor widening.
  • Seismic retrofit of bearings.
  • Fatigue analysis.
  • Bracket replacement.
  • Stringer replacement.
  • Girder repairs.
  • Back-wall strengthening.
  • Substructure modifications.
  • Phased construction.
  • Extensive railroad coordination (45+ trains per day).
  • Public involvement.
  • Traffic analysis.
  • Traffic maintained during construction
  • Temporary traffic signal - utilized only at night to provide two lanes of construction during the day and then to allow for an additional lane at night for contractor use.
  • 2008 ABCD Outstanding Rehabilitated Bridge Award.