Exhibit 24 - Power of Attorney

LIMITED POWER OF ATTORNEY ? SECURITIES LAW COMPLIANCE


            The undersigned, as an officer, director, or employee of
Equitrans Midstream Corporation, or its subsidiaries or affiliates
(the ?Company?), hereby constitutes Tobin M. Nelson, Nathaniel D. DeRose,
Lisa M. Lind, Mary Krejsa and Kelly Fritz or any one of them the
undersigned?s true and lawful attorney-in-fact and agent to complete
and execute such Form ID Uniform Applications for Access Codes to
File On Edgar, Forms 144, Forms 3, 4 and 5, Schedules 13D and 13G
and other forms and schedules as any attorney shall in his or her
discretion determine to be required or advisable pursuant to Rule
144 promulgated under the Securities Act of 1933 (as amended),
Sections 13 and 16 of the Securities Exchange Act of 1934
(as amended) and the rules and regulations promulgated thereunder,
or any successor laws and regulations, as a consequence of the
undersigned?s ownership, acquisition, or disposition of securities
of the Company, and to do all acts necessary in order to file such
forms with the Securities and Exchange Commission, any securities
exchange or national association, the Company and such other person
or agency as the attorney shall deem appropriate.  The undersigned
hereby ratifies and confirms all that said attorneys-in-fact and
agents shall do or cause to be done by virtue hereof.

            This Limited Power of Attorney shall remain in effect
until the undersigned is no longer required to make filings pursuant
to Rule 144 promulgated under the Securities Act of 1933 (as amended),
Sections 13 and 16 of the Securities Exchange Act of 1934 (as amended)
and the rules and regulations promulgated thereunder, or any successor
laws and regulations, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing attorneys-in-fact.

            This Limited Power of Attorney is executed in New Mexico as of
the date set forth below.


  	/s/ Patricia K. Collawn
Signature

       Patricia K. Collawn
Type or Print Name

Date:	3/25/20