MARKWEST ENERGY PARTNERS, L.P. AND MARKWEST ENERGY FINANCE CORPORATION AND THE SUBSIDIARY GUARANTORS NAMED HEREIN, AND WELLS FARGO BANK, NATIONAL ASSOCIATION, as TrusteeSixth Supplemental Indenture • November 15th, 2011 • Markwest Energy Partners L P • Crude petroleum & natural gas • New York
THIS SIXTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of November 10, 2011, is by and among MarkWest Energy Partners, L.P., a Delaware limited partnership (the “Company”), MarkWest Energy Finance Corporation, a Delaware corporation (“Finance Corp.” and, together with the Company, the “Issuers”), the Subsidiary Guarantors (as defined in the Indenture referred to herein), and Wells Fargo Bank, National Association, as trustee (the “Trustee”).
