X0306 4 2015-08-20 0001603286 Dominion Midstream Partners, LP DM 0001164770 MCGETTRICK MARK F 120 TREDEGAR STREET RICHMOND VA 23219 1 1 EVP and CFO Common Units (Limited Partner Interests) 2015-08-20 4 P 0 5000.0000 34.9511 A 64900.0000 D Price reflects the weighted average purchase price. Units were purchased at prices ranging from $34.78 to $35.00. The filer undertakes to provide upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of units purchased at each separate price. The Reporting Person is an officer and director of Dominion Midstream GP, LLC, the general partner of the Issuer. The Issuer is managed by the directors and officers of Dominion Midstream GP, LLC. /s/Charlotte B. Anderson, Power Of Attorney 2015-08-24