X0202 4 2004-08-13 0 0000751652 QUESTAR CORP STR 0001174637 HOLBROOK CONNIE C 180 EAST 100 SOUTH SALT LAKE CITY UT 84111 0 1 0 0 Sr. VP, Gen. Counsel, Corp Sec Common Stock and attached Common Stock Purchase Rights 2004-08-13 4 M 0 1545 17 A 129678 D Common Stock and attached Common Stock Purchase Rights 29978.4897 I Employee Investment Plan Common Stock and attached Common Stock Purchase Rights 2004-08-13 4 F 0 644 40.78 D 129034 D Common Stock and attached Common Stock Purchase Rights 17 2004-08-13 4 M 0 1545 17 D 2002-08-09 2009-02-09 Common Stock and attached Common Stock Purchase Rights 1545 134954 D Phantom Stock Units 0 Phantom Stock Units 0 7697.2328 D As of August 13, 2004, I have 29,978.4897 equivalent shares of stock in my account in Questar's Employee Investment Plan. 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 Ms. Holbrook includes installments of her 2001, 2002, and 2003 options that vested since the date of the last report. This date is unknown since I am only reflecting my total in phantom stock units at this time. I receive phantom stock units as a result of my participation in an excess benefit plan. This total includes 2,996.4022 units in such plan in addition to units held through my account balance in a deferred compensation plan. I exercised an option to purchase 1,545 shares of stock using 644 shares as consideration. Connie C. Holbrook 2004-08-16