June 15, 2006

Barrie McKay

Questar Gas Company

180 East 100 South

P.O. Box 45360

Salt Lake City, UT 84145

RE: Tariff 2006-05- Docket No. 05-057-T01            The purpose of this filing is for the approval of the Conservation Enabling Tariff Adjustment Option and Accounting Orders

Dear Mr. McKay:

                        The Commission has reviewed the proposed tariff revisions transmitted with your Advice Letter No. 2006-05, dated June 2, 2006.

                        The Division has recommended that the Commission accept the revisions in the above named tariff. Now therefore, the revisions, with an effective date of June , 2006, have hereby been approved by the Commission.

Sincerely, 

/s/Julie Orchard

Commission Secretary

JPO/tab