POWER OF ATTORNEY We, the undersigned directors of Questar Corporation, hereby severally constitute R. D. Cash and W. F. Edwards, and each of them acting alone, our true and lawful attorneys, with full power to them and each of them to sign for us, and in our names in the capacities indicated below, the Annual Report on Form 10-K for 1993 and any and all amendments to be filed with the Securities and Exchange Commission by Questar Corporation, hereby ratifying and confirming our signatures as they may be signed by the attorneys appointed herein to the Annual Report on Form 10-K for 1993 and any and all amendments to such Report. Witness our hands on the respective dates set forth below. Signature Title Date /s/ R. D. Cash Chairman of the Board, 2-8-94 R. D. Cash President & Chief Executive Officer /s/ R. H. Bischoff Director 2-8-94 R. H. Bischoff /s/ U. Edwin Garrison Director 2-8-94 U. Edwin Garrison /s/ J. A. Harmon Director 2-8-94 J. A. Harmon /s/ W. Whitley Hawkins Director 2-8-94 W. Whitley Hawkins /s/ William N. Jones Director 2-8-94 William N. Jones /s/ R. E. Kadlec Director 2-8-94 R. E. Kadlec /s/ Dixie L. Leavitt Director 2-8-94 Dixie L. Leavitt /s/ Neal A. Maxwell Director 2-8-94 Neal A. Maxwell /s/ Mary Mead Director 2-8-94 Mary Mead /s/ Gary G. Michael Director 2-8-94 Gary G. Michael /s/ D. N. Rose Director 2-8-94 D. N. Rose /s/ Harris H. Simmons Director 2-8-94 Harris H. Simmons