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We consent to the incorporation by reference in this Amendment No. 1 to the Registration Statement No. 333-174693 on Form S-3 of our report dated February 28, 2011 relating to the financial statements and financial statement schedule of Southwestern Public Service Company appearing in the Annual Report on Form 10-K of Southwestern Public Service Company for the year ended December 31, 2010, and to the reference to us under the heading "Experts" in the Prospectus, which is part of this Registration Statement.