New York, February 01, 2016 -- Moody's Investors Service, ("Moody's") placed the Prime-1 short-term commercial paper rating of Questar Corporation (Questar) on review for downgrade. At the same time, Moody's affirmed the ratings of Questar's two principal subsidiaries: Questar Gas (A2 senior unsecured) and Questar Pipeline (A3 senior unsecured). The rating outlooks for Questar Gas and Questar Pipeline are stable.

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