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Compressed Natural Gas Station P3 Program Management and Construction Management Oversight

Innovative public-private partnership brings cleaner fuel to Pennsylvanians.
  • View of ribbon-cutting ceremony at York CNG fueling station - Gannett Fleming.

    Opened in June 2017, Rabbittransit’s CNG fueling station in York features public access. 

  • Side view of CNG bus at Mid Mon Valley Transit Authority station - Gannett Fleming.

    CNG buses offer fuel savings and reduced maintenance costs for transit agencies.

  • Outside view of CamTran CNG fueling station in Johnstown - Gannett Fleming.

    The new Johnstown station is a key resource for Cambria County as it converts its bus fleet to CNG.

Pennsylvania Department of Transportation

Trillium CNG

28 counties in Pennsylvania

Our Role
Program Management, Construction Management

29 CNG fueling stations
Construction Cost
$84.5 million
In progress
New Construction
  • 29 CNG fueling stations for 25 transit agencies
  • 1,600 CNG buses put into service
  • Estimated $10 million annual savings in fuel costs after conversion to CNG.

The second-largest producer of natural gas in the country, Pennsylvania sought ways to provide access to compressed natural gas (CNG) as an alternative fuel to its citizens, especially in rural areas. In 2013, the Pennsylvania Department of Transportation (PennDOT) embarked on a three-year effort to establish a plan to achieve this goal. The result was a public-private partnership (P3) between PennDOT and Trillium CNG to build 29 CNG fueling stations for 25 transit agencies across the state. The project will put an estimated 1,600 CNG buses into service, reducing fuel and maintenance costs for the agencies and eliminating a projected 20 million pounds of carbon dioxide emissions each year.

As the project moves forward, PennDOT serves as a single source of contact for Trillium, responsible for all project coordination, management, and oversight, including contracting. This role also enables PennDOT to offer Trillium clear communication and direction for all 29 station sites. 

What We Did

Gannett Fleming was contracted to be part of the PennDOT team, providing necessary constructability reviews and construction management oversight as well as initial operations and maintenance oversight as the fueling stations are built. Gannett Fleming also provided a program manager and document control specialist co-located within PennDOT offices, along with other experts working as an extension of the PennDOT staff.

With Gannett Fleming on its team, PennDOT can assure the transit agencies that controls are in place to build and run each fueling station to specification. As the project heads toward completion in 2021, the results of this innovative P3—cleaner air, fuel savings, reduced costs, and local jobs—will benefit Pennsylvanians throughout the commonwealth.

Key Features

  • Six fueling stations open to the public, with the option to add more as needed
  • Fuel provided for an estimated 1,600 CNG buses replacing aging fleets
  • CNG-related upgrades made to existing transit maintenance facilities.

Sustainability Features & Outcomes

  • 20 million pounds of carbon dioxide emissions will be eliminated each year
  • $2.3 million in royalties from public fuel sales support project costs, creating a sustainable revenue source
  • $10 million in fuel savings for regional transit agencies enables project to pay for itself after 10 years
  • CNG offers cleaner engine combustion that will prolong the buses’ engine life and reduce maintenance and replacement costs.

Awards & Recognition

  • Diamond Award, 2019, American Council of Engineering Companies (ACEC) Pennsylvania, Diamond Awards for Engineering Excellence
  • Innovative Project of the Year, 2017, Engineers’ Society of Western Pennsylvania, 2017 Awards of Distinction

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