EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 (No. 333-113775) of our report dated February 28, 2005 relating to the financial statements, management’s assessment of the effectiveness of internal controls over financial reporting and the effectiveness of internal controls over financial reporting, which appears in CONSOL Energy Inc.’s Annual Report on Form 10-K for the year ended December 31, 2004. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/  PricewaterhouseCoopers LLP

Pittsburgh, Pennsylvania

February 28, 2005