X0202 4 2004-05-03 0 0000751652 QUESTAR CORP STR 0001179477 CASH R D 1 0 0 0 Common Stock and attached Common Stock Purchase Rights 33137 I Private Foundation Common Stock and attached Common Stock Purchase Rights 328710 D Phantom Stock Units 35.47 2004-05-03 4 D 0 15243.6535 35.47 D 2004-05-03 2004-05-03 Phantom Stock Units 15243.6535 41485.4345 D Common Stock and attached Common Stock Purchase Rights 0 Common Stock and attached Common Stock Purchase Rights 0 580696 D This total does not include 7,534 shares held indirectly through family trusts for which I have voting and investment control. This total reflects payment made on 5/3/2004 for 15,243.6535 phantom stock units that was paid in cash and calculated using 4/30/2004's closing price of $35.47 a share. It also includes 24,512.3646 phantom stock units held in an excess benefits plan as well as phantom stock units attributable to deferred director's fees. This is the second of four cash payments installments for the value of my phantom stock units (exclusive of deferred director's fees). This date is unknown since I am only reflecting my total in common stock and attached common stock purchase rights at this time. Connie C. Holbrook Attorney in Fact for R.D. Cash 2004-05-03