Storage is a keystone in the Keystone State’s fast-developing Marcellus shale-gas play. At a recent Marcellus Midstream conference held in Pittsburgh, John Shelton, director of storage for NiSource Gas Transmission & Storage, discussed the company’s experiences to date in solving storage issues, and looked at the opportunities presented by the wide-spread Marcellus. He termed this a “balancing act.”

NGT&S’ assets have annual deliveries of 1.4 trillion cubic feet over 15,500 miles of pipeline, with operations in 16 states. It owns 37 storage fields with total capacity of 640 billion cubic ...