STR Sitio Royalties Corporation

POWER OF ATTORNEY REPORTS, SECURITIES TRANSACTIONS I, J T McManus, of 333 S State Street, SLC, UT 84145, as a Director of Questar Corporation (the "Company"), do hereby appoint Thomas C. Jepperson and Julie A Wray or each of them acting alone, my true and lawful attorney-in-fact to sign any Form 3, Form 4, Form 5, or Form 144 Reports that I am required to file with the Securities and Exchange Commission reporting transactions involving shares of the Company's common stock and derivative securities whose value is dependent on such shares, including option grants and phantom stock units allocated to my accounts under the terms of deferred compensation plans adopted by the Company and its subsidiaries. I acknowledge that Mr. Jepperson and Ms. Wray are not assuming any responsibility that I have to comply with federal securities laws, including compliance with Section 16 of the Securities and Exchange Act of 1934. This Power of Attorney shall remain in full force and effect with respect to my holdings of any transactions of securities issued by the Company as long as I am required to make reports of my transactions, unless I revoke it with a signed writing prior to such date. Date J T McManus 9/17/2014 /s/J T McManus State of Alabama ) County of Jefferson ) Subscribed and sworn to before me this 17th day of September, 2014. Notary Public /s/ Karen A Burton My commission expires: 07/25/2017