The grant of $1.15 million will be given to the Port of Pittsburgh Commission to help fund the repowering of four marine towing vessels with new, more efficient diesel engines and generators.
New engines "will reduce air pollution, improve air quality and lessen overall environmental impacts," the EPA said.
The Port of Pittsburgh Commission and three participating companies will provide $1.9 million for the repowering project.
David Arnold, Air Protection deputy director, EPA mid-Atlantic Region, will present the grant to the Port of Pittsburgh Commission on Wednesday, July 28.
Pittsburgh, Pennsylvania is the second-largest inland port in the US, and moves more than 44 million metric tonnes (mt) of cargo annually along its three major waterways – the Allegheny, Monongahela and Ohio Rivers.
The city sits at the northeastern end of the nation's 9,000-mile inland waterway system, giving access to markets as far west as Sioux City and as far south as New Orleans.