Pipeline powerhouse TC Energy is selling its Appalachian Basin assets to UGI Energy Services for $1.275 billion. : Canada-based TC Energy Corporation has entered into an agreement to sell its U.S. midstream assets to UGI Energy Services, LLC for $1.275 billion (USD), the company announced Tuesday. The assets are held by TC Energy (formerly known as TransCanada) subsidiary Columbia Midstream Group and will be sold to UGI Corporation’s subsidiary. Columbia Midstream Group operates in the Appalachian Basin and owns four natural gas gathering systems and an interest in a company with gathering, processing and liquids assets.