International Bridge Fifth Lane Project

Lewiston-Queenston Bridge gets a major upgrade

  • Prime Consultant leading a bi-national consulting team for a major upgrade to the Lewiston-Queenston bridge, a 500-m bridge with a 330-m main-span hingeless steel arch with steel box-girder U.S. and Canadian approach spans
  • Provided preliminary design services and detailed design services for major redecking and widening
  • Developed a detailed probabilistic seismic hazard assessment and response spectra for the functional (500-year return period) and safety level (2500-year return period) earthquakes
  • Coordinated new lane control system, new bridge lighting, and new access and fall protection systems


  • seismic hazard assessment
  • preliminary design services
  • detailed design services for major redecking, widening and seismic retrofit
  • construction support services
  • Location: Fort Erie, Ontario – New York, U.S.A