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S-1/A - S-1/A - CLOUD PEAK ENERGY INC.a2201382zs-1a.htm
EX-1.1 - EX-1.1 - CLOUD PEAK ENERGY INC.a2201382zex-1_1.htm
EX-23.2 - EX-23.2 - CLOUD PEAK ENERGY INC.a2201382zex-23_2.htm

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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We hereby consent to the incorporation by reference in this Registration Statement on Amendment No. 2 to Form S-1 of our report dated March 16, 2010 relating to the financial statements, which appears in Cloud Peak Energy Inc.'s Annual Report on Form 10-K for the year ended December 31, 2009. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

/s/ PricewaterhouseCoopers LLP
Denver, CO
December 13, 2010




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