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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 re-decking 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