Where is hg energy llc located? HG Energy, LLC. HG Energy, LLC is a leading independent producer of natural gas and oil proudly supporting economic growth and development in the Appalachian Basin. Privately owned and headquartered in Parkersburg, West Virginia, HG Energy owns and operates approximately 1,300 oil and gas wells in Ohio and West Virginia.What does hg energy do? HG Energy, LLC is a leading independent producer of natural gas and oil and proudly supports economic growth and development in the Appalachian Basin. Privately owned and headquartered in Parkersburg, West Virginia, HG Energy owns and operates oil and gas wells in Ohio, Pennsylvania, and West Virginia.How do i contact hge? We are proud to be your neighbors! Learn more about HG&E or contact us at (413) 536-9300. See all news...How do i contact the energy department by phone? By Phone: 202-586-5000 (Main Switchboard) For Hearing and/or Speech Impaired: 1-800-877-8339. By Fax: 202-586-4403. *By Mail: U.S. Department of Energy. 1000 Independence Ave., SW. Washington, DC 20585. *Please note: mail may take up to 3 weeks to arrive.