Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in Amendment No. 1 to the Registration Statement on Form S-4 and related Prospectus of Arch Coal, Inc. for the exchange of up to $600,000,000 of its 8 ³/4% senior notes and to the incorporation by reference therein of our reports dated March 1, 2010, with respect to the consolidated financial statements and schedule of Arch Coal, Inc., and the effectiveness of internal control over financial reporting of Arch Coal, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 2009, filed with the Securities and Exchange Commission.

St. Louis, Missouri

May 13, 2010