Tappan Zee Bridge Replacement

GPI is providing independent quality assurance services for design and construction on this $3.14 billion bridge replacement project of the Tappan Zee Bridge over the Hudson River. More »

Shippensburg University Student Housing

As a part of a design build development team , GPI provided all engineering services for a two phase 1,850 bed student housing project on the campus of Shippensburg University in southwest Pennsylvania. More »

North Bank Pedestrian Bridge at Night in Boston, MA

As part of a joint venture team, GPI served as the lead firm overseeing the design and construction of the 2013 ACEC award winning North Bank Bridge and Park project. More »

First Coast Expressway, Northeast Florida

The First Coast Expressway is a new multi-lane limited access toll facility that will eventually connect Interstate 95 in northern St. Johns County to Interstate 10 in western Duval County. More »

Bayonne Bridge Navigational Clearance Program

GPI is providing construction management services for the $743-million Bayonne Bridge Navigational Clearance Program (BBNCP). More »


Featured Project

Rehabilitation/Replacement of American Falls Bridges

Niagara’s Goat Island Bridge

GPI has been developing preliminary design alternatives to address the deterioration of two historic Niagara Falls State Park bridges, located in the Niagara River rapids about 1000 feet above the brink of the American Falls.  Read More.

Company News

Design Firm of the year


Construction on the new Tappan Zee Bridge

Coinciding with our 50 year anniversary, Engineering News Record (ENR) New York selected Greenman-Pedersen, Inc. as the 2016 Design Firm of the Year. Read More.