Prior to the development of this 39,000-seat baseball stadium on the North Shore of Pittsburgh, GAI’s involvement in this project began with the demolition of the old North Side neighborhood, including determining detour routes, relocating utilities, and NPDES permitting for future construction.

During the design development phase, GAI provided site and utility engineering design of the River Bulkhead Wall,  Sewage Facilities Planning Module; conducted a flood risk assessment, including hydrological and hydrogeological studies; coordinated all field surveying activities with the Project Surveyor; and designed a reliable and cost-effective 1,110-ft-long anchored sheet pile wall to support an attractive Riverwalk area between the ballpark and the Allegheny River. During the final design phase, GAI provided design modifications to two existing ALCOSAN diversion chambers to accommodate the construction of the new ballpark, and designed the underdrain system and flood control vault. GAI implemented green infrastructure techniques during the Individual NPDES permitting process by designing scour and fish habitat restoration within the Allegheny River. GAI reduced the overall impervious surface footprint of the area where PNC Park is located, and developed a flood protection/drainage system that collects stormwater runoff after it infiltrates the natural grass playing field, and is then pumped to the Allegheny River via an underground vault and variable speed pumping system. The stormwater drains through a 3-ft-thick layer of soil, sand, and crushed clay mixtures, providing water quality improvements before it enters the collection system.