THIRD SUPPLEMENTAL INDENTURE DATED AS OF MARCH 6, 2008Markwest Energy Partners L P • March 2nd, 2009 • Crude petroleum & natural gas • New York
Company FiledMarch 2nd, 2009 Industry JurisdictionThis THIRD SUPPLEMENTAL INDENTURE, dated as of March 6, 2008 is among MarkWest Energy Partners, L.P., a Delaware limited partnership (the "Partnership"), MarkWest Energy Finance Corporation, a Delaware corporation ("MarkWest Finance" and, together with the Partnership, the "Issuers"), each of the parties identified under the caption "Subsidiary Guarantors" on the signature page hereto (the "Subsidiary Guarantors") and Wells Fargo Bank, National Association, a national banking association, as Trustee.
81/2% SENIOR NOTES DUE 2016Markwest Energy Partners L P • March 2nd, 2009 • Crude petroleum & natural gas • New York
Company FiledMarch 2nd, 2009 Industry JurisdictionThis FIRST SUPPLEMENTAL INDENTURE, dated as of March 6, 2008 is among MarkWest Energy Partners, L.P., a Delaware limited partnership (the "Partnership"), MarkWest Energy Finance Corporation, a Delaware corporation ("MarkWest Finance" and, together with the Partnership, the "Issuers"), each of the parties identified under the caption "Subsidiary Guarantors" on the signature page hereto (the "Subsidiary Guarantors") and Wells Fargo Bank, National Association, a national banking association, as Trustee.