83/4% SENIOR NOTES DUE 2018Third Supplemental Indenture • March 2nd, 2009 • Markwest Energy Partners L P • Crude petroleum & natural gas • New York
Contract Type FiledMarch 2nd, 2009 Company Industry JurisdictionThis THIRD SUPPLEMENTAL INDENTURE, dated as of September 15, 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 2016Third Supplemental Indenture • March 2nd, 2009 • Markwest Energy Partners L P • Crude petroleum & natural gas • New York
Contract Type FiledMarch 2nd, 2009 Company Industry JurisdictionThis THIRD SUPPLEMENTAL INDENTURE, dated as of August 4, 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.