EXHIBIT A

Joint Filing Agreement

We, the undersigned, hereby express our agreement that the attached Schedule 13D is, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934.  This agreement may be terminated with respect to the obligations to jointly file future amendments to such statement on Schedule 13D as to any of the undersigned upon such person giving written notice thereof to each of the other persons signatory hereto, at the principal office thereof.

Dated: May 22, 2018

[Signature Page Follows]

EQT GP HOLDINGS, LP
By: EQT GP Services, LLC, its general partner
By:	/s/ Robert J. McNally
Name:	Robert J. McNally
Title:	Senior Vice President and Chief Financial Officer
EQT GP SERVICES, LLC
By:	/s/ Robert J. McNally
Name:	Robert J. McNally
Title:	Senior Vice President and Chief Financial Officer
EQT GATHERING HOLDINGS, LLC
By:	/s/ Jeremiah J. Ashcroft III
Name:	Jeremiah J. Ashcroft III
Title:	President
RICE MIDSTREAM HOLDINGS LLC
By:	/s/ Jeremiah J. Ashcroft III
Name:	Jeremiah J. Ashcroft III
Title:	President
RICE ENERGY OPERATING LLC
By:	/s/ David E. Schlosser, Jr.
Name:	David E. Schlosser Jr.
Title:	President
EQT RE, LLC
By:	/s/ David E. Schlosser, Jr.
Name:	David E. Schlosser, Jr.
Title:	President
EQT PRODUCTION COMPANY
By:	/s/ David E. Schlosser, Jr.
Name:	David E. Schlosser, Jr.
Title:	President

Signature Page to Joint Filing Agreement for EQT Midstream Partners, LP

EQT INVESTMENTS HOLDINGS, LLC
By:	/s/ Joshua C. Miller
Name:	Joshua C. Miller
Title:	Vice President
EQT CORPORATION
By:	/s/ Robert J. McNally
Name:	Robert J. McNally
Title:	Senior Vice President and Chief Financial Officer

Signature Page to Joint Filing Agreement for EQT Midstream Partners, LP