Rockland County - Westchester County, NY
  • Design-Build
  • Cable-Stayed
  • Plate Girder

Governor Mario M Cuomo Bridge

  • Design-Build
  • Cable-Stayed
  • Plate Girder


The Largest Project in High Steel's History

High Steel Structures LLC, was one of three fabricators who combined to provide more than 110,000 tons of structural steel plate girders for New York’s new Governor Mario M. Cuomo Bridge, which replaced the Tappan Zee Bridge. The "New NY Bridge Project" is one of the largest transportation design-build projects to date in the United States.

High Steel provided over 50,000 tons of steel for half of the 20 approach spans on the bridge.  Steel deliveries began in October of 2014. Both Grade 50 and 70 High Performance Steel (HPS) plate steel was employed in the design.

The majority of the girders are over 100,000 pounds and crossframes are up to 5,000 pounds each. Most of the girders are approaching 12 feet in depth, which required that they be shipped in the horizontal position.

The Governor Mario M. Cuomo Bridge carries the Thruway, Interstate 87, and Interstate 287 over the Hudson River between South Nyack, Rockland County, New York and Tarrytown, Westchester County, New York. The new bridge was opened to traffic in 2018 and was designed and constructed to last 100 years without major structural maintenance.

Download PDF - High Steel Project Brochure

Photo Credit: All jobsite photos courtesy New York State Thruway Authority

Steel Fabrication

  • Scope: 1/2 Approach Spans
  • Steel Members Plate Girders, Crossframes

  • 2020 NSBA Prize Bridge Award - National Award, Major Span

Project Details:

Project Specs

  • Bridge Type: Plate Girder / Cable Stay
  • Steel Tonnage: 50,000 Tons (Half of the Approach Spans)
  • Steel Type: Grade 50 and Grade 70
  • Coating: Three-Coat Paint System


Project Team

  • Project Owner: New York State Thruway Authority
  • Contractor: Tappan Zee Constructors
  • Design Consultant: HDR, Buckland & Taylor, URS, and GZA.
  • Detailer: High Steel Structures LLC