EXHIBIT 4.17 FOURTH SUPPLEMENTAL SENIOR NOTE INDENTURE FOURTH SUPPLEMENTAL SENIOR NOTE INDENTURE (this "SUPPLEMENTAL SENIOR NOTE INDENTURE"), dated as of February 16, 2000 among Peabody Natural Gas, LLC, a Delaware limited liability company (the...Fourth Supplemental Senior Note Indenture • May 13th, 2002 • Peabody Energy Corp • Bituminous coal & lignite surface mining • New York
Exhibit 4.14 FOURTH SUPPLEMENTAL SENIOR NOTE INDENTURE FOURTH SUPPLEMENTAL SENIOR NOTE INDENTURE (this "Supplemental Senior Note Indenture"), dated as of February 16, 2000 among Peabody Natural Gas, LLC, a Delaware limited liability company (the...Fourth Supplemental Senior Note Indenture • August 10th, 2001 • Affinity Mining Co • Bituminous coal & lignite surface mining • New York
