Case Study

I-579 Urban Open Space Cap

The construction of Interstate 579 (I-579) through Pittsburgh, PA, more than 60 years ago separated the Hill District from the downtown. With the help of federal grant money from the Transportation Investment Generating Economic Recovery program, the Urban Open Space Cap project creates a new modern park with room for outdoor events and reconnects the disenfranchised district to the city’s economic core.

The I-579 project functions as a “cap” over the interstate that provides a walkable link from the Hill District to the downtown. The new park includes art installations, story walls, outdoor classroom space, and an amphitheater, as well as bike and pedestrian pathways.

In the latest case study from the PCI Mid-Atlantic Chapter, see how the project team developed first-of-its-kind criteria to meet the complex demands associated with the intended use of the park area. They evaluated both the final in-service condition of the bridge and the construction loadings associated with placing the fill and amenities on the bridge.

Download the Case Study Now


  • The project’s key details, including the scope, team members, and challenges
  • The solution that overcame design, delivery, and construction obstacles
  • The walkable link from the Hill District to downtown Pittsburgh and new park amenities.


The PCI Mid-Atlantic Chapter is a trusted regional trade association, top business partner, and leading voice for the precast, prestressed concrete industry that promotes the growth, profitability, and positive perception of the Mid-Atlantic market by building awareness of precast benefits and use, supporting member success, and educating professionals in construction, design, and academia, to make precast, prestressed concrete building, and transportation products an early structural and enclosure choice for new projects.