Ergon plans to invest over $78m to increase the capacity of the refinery’s processing units and improve the supporting infrastructure.

The expansion project is a part of the company’s strategy to manage the growing local crude oil production to handle the increased drilling activities across the Marcellus and Utica Shale areas.

Ergon West Virginia president Don Davis said, "This expansion will provide our customers with even greater reliability, higher quality fuels and an improved customer experience."

Most of the upgrade work is expected to be completed during the second quarter of 2013, while the remaining work will be completed in 2014.