Gannett Fleming

Gannett Fleming. It is a global infrastructure firm specializing in engineering, construction, and environmental consulting. Founded in the early 20th century, the company has grown from a small Pennsylvania partnership into a major player involved in critical projects across North America and internationally. Its work spans the transportation, water, environmental, and facilities sectors, contributing to the resilience and functionality of public and private infrastructure.

History

The firm was established in 1915 by civil engineers John Gannett and John Fleming in Harrisburg, Pennsylvania. Early work focused on water supply and wastewater systems for municipalities across Pennsylvania and the Mid-Atlantic states. A significant early project was the design of the Spring Creek Dam for the city of Harrisburg. The company expanded its services through the mid-20th century, notably contributing to the Interstate Highway System and taking on major water resources projects like the Safe Drinking Water Act-era upgrades for utilities. Key growth came through strategic acquisitions, such as the engineering divisions of Day & Zimmermann in the 1990s and firms like Golder Associates' U.S. infrastructure unit in the 2010s, broadening its geographic and technical reach into construction management and tunneling.

Services

The company provides a comprehensive suite of professional services primarily within the infrastructure lifecycle. Its core offerings include transportation engineering for highways, bridges, railroads, and transit systems, and water resources engineering encompassing hydrology, dam safety, and stormwater management. The firm also delivers extensive environmental engineering services, such as site remediation and compliance for Superfund sites, and robust construction management and program management for large-scale public works. Additional specialized services include geotechnical engineering, structural engineering, and facilities design for clients like state departments of transportation, the United States Army Corps of Engineers, and major utility companies.

Notable projects

Gannett Fleming has been involved in numerous high-profile infrastructure endeavors. In transportation, key projects include the design and construction management for the E-ZPass electronic toll collection system across several northeastern states, major improvements to the George Washington Memorial Parkway in Virginia, and significant work on Amtrak's Northeast Corridor. For water resources, landmark work includes the design of the Central Utah Project's Jordanelle Dam and ongoing dam safety and rehabilitation work for the Tennessee Valley Authority. The firm provided critical tunnel engineering for the Allegheny County Sanitary Authority's wet weather management program in Pittsburgh and has executed large-scale environmental remediation at former industrial sites for the United States Environmental Protection Agency.

Company structure

Headquartered in Camp Hill, Pennsylvania, the firm operates as an employee-owned corporation, a structure adopted to promote long-term stability and align employee interests with client success. It maintains a decentralized operational model with numerous regional offices across the United States and Canada, including major hubs in Valley Forge, Pennsylvania, New York City, and Toronto. The organization is typically divided into market-focused business lines such as Transportation, Water, Environmental, and Construction Services, each led by senior vice presidents. This structure supports integrated project delivery for complex programs, often in joint venture with other firms like AECOM or STV Incorporated.

Awards and recognition

The company and its projects have received extensive industry accolades. It has consistently been ranked among the top design firms by publications like Engineering News-Record, particularly in categories for Transportation, Sewer and Waste, and Hazardous Waste. Project-specific honors include numerous American Council of Engineering Companies (ACEC) Engineering Excellence Awards for projects such as the Reston Station parking garage in Virginia and the Poplar Street Bridge rehabilitation. The firm has also been recognized by the American Public Works Association and has received safety awards from organizations like the National Safety Council for its outstanding record on construction sites.