X0202 4 2004-12-13 0 0000751652 QUESTAR CORP STR 0001177840 ROBINSON GLENN H 180 E 100 S SALT LAKE CITY UT 84111 0 1 0 0 Vice President Common Stock and attached Common Stock Purchase Rights 19046 D Common Stock and attached Common Stock Purchase Rights 27720.8489 I Employee Investment Plan Phantom Stock Units 48.65 2004-12-13 4 A 0 20.2355 48.65 A Phantom Stock Units 20.2355 6117.2691 D Common Stock and attached Common Stock Purchase Rights 0 Common Stock and attached Common Stock Purchase Rights 0 98227 D As of December 13, 2004, I have 27,720.8489 equivalent shares of stock in my account in Questar's Employee Investment Plan. The number of equivalent shares will fluctuate as Questar's stock price changes, this fluctuation does not reflect any transactions that should be reported. 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 1,518.1695 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. Connie C. Holbrook Attorney in Fact for G.H. Robinson 2004-12-14