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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated March 1, 2011 relating to the financial statements, which appears in Cloud Peak Energy Resources LLC's Annual Report on Form 10-K for the year ended December 31, 2010. We also consent to the reference to us under the heading "Experts" in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Denver, CO
October 7, 2011
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM