Exhibit 3.35

                                                    STATE OF DELAWARE
                                                   SECRETARY OF STATE
                                                DIVISION OF CORPORATIONS
                                                FILED 09:00 AM 08/22/2002
                                                    020533414-3561696

                                STATE OF DELAWARE

                            LIMITED LIABILITY COMPANY
                            CERTIFICATE OF FORMATION

                                       OF

                             ESPERANZA COAL CO., LLC

FIRST:  The name of the limited liability company is:

        ESPERANZA COAL CO., LLC

SECOND: The address of its registered office in the State of Delaware is:

                                2711 Centerville Road, Suite 400
                                Wilmington, Delaware 19808

        The name of its Registered Agent at such address is:

                           Corporation Service Company

THIRD:  The name and address of the authorized person is:

                           Peggy Doeden
                           Bartlit Beck Herman Palenchar & Scott
                           1899 Wynkoop Street, Suite 800
                           Denver, Colorado  80202

      The undersigned has executed this Certificate of Formation of Esperanza
Coal Co., LLC on this 22nd day of August 2002.

                                                      /s/ Peggy Doeden
                                                      Peggy Doeden
                                                      Authorized Person