EXHIBIT 32.2

                   CERTIFICATION OF PERIODIC FINANCIAL REPORTS

I, Richard A. Navarre, Executive Vice President and Chief Financial Officer of
Peabody Energy Corporation, certify, pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)   the Quarterly Report on Form 10-Q for the quarter ended June 30, 2006 (the
      "Periodic Report") which this statement accompanies fully complies with
      the requirements of Section 13(a) or 15(d) of the Securities Exchange Act
      of 1934; and

(2)   information contained in the Periodic Report fairly presents, in all
      material respects, the financial condition and results of operations of
      Peabody Energy Corporation.

Dated: August 7, 2006

                              /s/ Richard A. Navarre
                             ---------------------------------------------------
                             Richard A. Navarre
                             Chief Financial Officer and
                             Executive Vice President of Corporate Development