POWER OF ATTORNEY

	REPORTS, SECURITIES TRANSACTIONS


I, Bruce A. Williamson, of 1000 Louisiana, Suite 5800,Houston, TX 77002, as a
director of Questar Corporation (the "Company"), do hereby appoint Abigail L.
Jones and S. E. Parks, 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 Ms. Jones and Mr. Parks 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.

	04/14/2006				/s/Bruce A. Williamson