Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the reference to our firm under the caption “Experts” in the Registration Statement (Form S-3) and related Prospectus of Questar Pipeline Company for the registration of debt securities and to the incorporation by reference therein of our report dated February 28, 2011 with respect to the consolidated financial statements and schedule of Questar Pipeline Company included in its Annual Report (Form 10-K) for the year ended December 31, 2010, filed with the Securities and Exchange Commission.
/s/Ernst & Young LLP
Salt Lake City, Utah
June 13, 2011