Exhibit 24

                            POWER OF ATTORNEY

	The undersigned hereby constitutes and appoints each of Carter M. Reid,
Karen W. Doggett, and Charlotte B. Anderson, signing singly, the undersigned's
true and lawful attorney-in-fact to:

        (1)  execute for and on behalf of the undersigned, with respect to
             the units and any other equity securities of Dominion Midstream
             Partners, LP, Form 144, in accordance with the Securities Act of
             1933 and the rules thereunder; and Forms 3, 4, and 5 in
             accordance with Section 16(a) of the Securities Exchange Act of
             1934 and the rules thereunder;

        (2)  do and perform any and all acts for and on behalf of the
	     undersigned which may be necessary or desirable to complete and execute
             any Forms 144, 3, 4, or 5 and timely file such form with the United
             States Securities and Exchange Commission and any stock exchange or
             similar authority; and

	(3)  take any other action of any type whatsoever in connection with the
             foregoing which, in the opinion of such attorney-in-fact, may be of
             benefit to, in the best interest of, or legally required by, the
             undersigned, it being understood that the documents executed by
	     such attorney-in-fact on behalf of the undersigned pursuant to this
	     Power of Attorney shall be in such form and shall contain such
             terms and conditions as such attorney-in-fact may approve in such
             attorney-in-fact's discretion.

      The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney
and the rights and powers herein granted.  The undersigned acknowledges that
the foregoing attorneys-in-fact, in serving in such capacity at the request
of the undersigned, are not assuming, nor is the Company assuming, any of
the undersigned's responsibilities to comply with the Securities Act of
1933 or Section 16(a) of the Securities Exchange Act of 1934.

      This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 144, 3, 4, and 5 with respect
to the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 30th day of December, 2015.


					      	   /s/Paul E. Ruppert
						      Paul E. Ruppert