X0202 4 2004-09-13 0 0000751652 QUESTAR CORP STR 0001178565 STANLEY CHARLES B 180 EAST 100 SOUTH PO BOX 45601 SALT LAKE CITY UT 84145-0601 0 1 0 0 Executive Vice President Common Stock and attached Common Stock Purchase Rights 41125 D Common Stock and attached Common Stock Purchase Rights 2271.3359 I Employee Investment Plan Phantom Stock Units 40.34 2004-09-13 4 A 0 0.3788 40.34 A Phantom Stock Units 0.3788 2830.8994 D Common Stock and attached Common Stock Purchase Rights 0 Common Stock and attached Common Stock Purchase Rights 0 168750 D As of September 13, 2004, I have 2,271.3359 equivalent shares of stock in Questar's Employee Investment Plan. Phantom stock units will be converted to cash beginning at retirement; my retirement date is unknown. I receive phantom stock units as a result of my participation in an excess benefit plan. This total includes 2,759.8634 units in such Plan in addition to units held through my account balance in a deferred compensation Plan. The question about dates is irrelevant since I am not reporting any changes in my stock options. As previously reported, the options granted in February of 2001, February of 2002 and February of 2003 vest in four equal annual installments beginning six months after grant. My total reported includes installments of my 2001, 2002, and 2003 options that vested since the date of the last report. Connie C. Holbrook Attorney in Fact for C.B. Stanley 2004-09-14