United States securities and exchange commission logo August 24, 2023 Thomas F. Karam Chief Executive Officer Equitrans Midstream Corporation 2200 Energy Drive Canonsburg, Pennsylvania 15317 Re: Equitrans Midstream Corporation Definitive Proxy Statement on Schedule 14A Filed February 23, 2023 File No. 001-38629 Dear Thomas F. Karam: We have completed our review of your filing. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Sincerely, Division of Corporation Finance Disclosure Review Program