I-84/I-87 Interchange

Erdman Anthony served as a subconsultant for this I-84/I-87 Interchange Project, located in Newburgh, NY that provides a direct connection between Interstate I-84 (east/westbound) and Interstate I-87 (north/southbound). Prior to the construction motorists were required to exit the interstate system and utilize the state highway system to travel between these two major interstate highways. This project connected I-84 and I-87 using numerous entrance ramps, exit ramps, fly-over ramps, and toll collection facilities all incorporated into a grade separated interchange site which also includes a NYS Police facility, a NYS Thruway Office Building, and a NYS Thruway maintenance facility . Erdman Anthony's bridge design incorporates a steel plate girder and concrete isotropic deck acting as a composite superstructure. The two-span continuous design utilizes the center pier located with the existing median of Route I-84. Abutment and pier footings were designed as spread footings, with the abutment footing built on a structural fill system that is supported by the mechanically stabilized earth structure (MSES) wall system. The (MSES) wall systems designed reduced slope construction and right-of-way acquisition costs for the sprawling interchange. In addition, Erdman Anthony's 3-Phase Erosion & Sediment Control Plans provided erosion and pollution control resulting from the large project area. The 3-Phase Erosion & Sediment Control Plans were design to work in conjunction with the proposed three-phase construction sequence and Traffic Control Plans. The water and sewer mains and appurtenances were designed to serve the new site and buildings sited within the interchange area. 

Project Accolades

  • Project Awards
  • 2010 Top 10 Roads Award - "Roads and Bridges" Magazine

Project Details


Newburgh, NY


New York State Thruway Authority

Construction Cost


Project Contact

William McCormick, PE
  • William McCormick, PE
  • 585-427-8888 x 1080
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