X0202 4 2004-09-07 0 0000751652 QUESTAR CORP STR 0001179019 PARKS S E 0 1 0 0 Sr. VP, and CFO Common Stock and attached Common Stock Purchase Rights 82712 D Common Stock and attached Common Stock Purchase Rights 22437.1886 I Employee Investment Plan Phantom Stock Units 40.65 2004-09-07 4 A 0 5.3137 40.65 A Phantom Stock Units 5.3137 3905.6403 D Common Stock and attached Common Stock Purchase Rights 0 Common Stock and attached Common Stock Purchase Rights 0 229748 D As of September 6, 2004, I have 22,437.1886 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 2,332.8621 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 option. 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. The total reported for Mr. Park includes installments of his 2001, 2002, and 2003 options that vested since the date of the last report. Connie C. Holbrook Attorney in Fact for S.E. Parks 2004-09-08