Caterpillar Inc. is preparing to fill its single largest oil and gas industry-related order in company history, with plans to deliver 39 natural gas compression engines for Energy Transfer Partners LP’s Rover Pipeline project.

Caterpillar said the engines would be capable of generating a combined 211,000 hp at nine planned compressor stations along Rover’s 711-mile path. Caterpillar Oil & Gas Account Manager Jeffery Elijah said “in terms of the amount of horsepower, the Rover Pipeline is one of the biggest projects we’ve been involved with.” Caterpillar is one of the largest manufacturers of construction equipment and diesel and natural gas engines in the world.

Announced in June 2014, the $4.22 billion pipeline would gather Marcellus and Utica shale natural gas from processing plants and interconnections in northwest West Virginia, eastern Ohio and western Pennsylvania for delivery to the Dawn Hub in Ontario, where it would be sent back to U.S. and Canadian markets.

Construction of the pipeline is expected to begin in 2016. Part of Rover is expected to be in service late next year, while the rest is expected to come online by mid-2017. Energy Transfer Senior Vice President Joey Mahmoud said the company has focused heavily on using American products and services. About 570 miles of Rover is planned to be built in Ohio. As a result, state companies Ohio Cat and Cleveland Brothers would provide post-sale service and support for the engines.

The engines are slated to be shipped and installed by the first quarter of 2016, when construction of the pipeline begins. The Cat engines feature improved combustion technology that helps lower emissions and reduces fuel consumption. They also feature longer maintenance intervals and easy assembly and dismantling features.