QUESTAR TO EXTEND STOCK-REPURCHASE PROGRAM

SALT LAKE CITY — Questar Corp. (NYSE:STR) today announced plans to extend its stock-repurchase program by acquiring up to an additional $25 million of its outstanding common shares over the next 12 months.

     The stock will be repurchased on the open market or in privately negotiated transactions. Questar has repurchased almost 3 million shares under the original $50 million program announced in April 1999.

     R.D. Cash, Questar chairman, president and chief executive officer, said that the extension of the stock-repurchase program "reflects our continuing belief that Questar stock is an attractive investment, especially with higher natural gas prices and our company's record gas-production levels."

     Cash said funding for the extended repurchase program will come from sales of stock Questar owns in various telecommunication companies. "These stocks continue to appreciate in value, allowing us to fund the repurchase program without diverting funds from our 2000 capital-expenditure program," he said.

     Questar is a $2.2 billion integrated energy resources and services company headquartered in Salt Lake City. Through subsidiaries, it engages in energy development and production; gas gathering and processing; wholesale gas, electricity and liquids trading; retail energy services; interstate gas transmission and storage; retail gas distribution; and information systems and technologies.

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