MARKWEST ENERGY PARTNERS, L.P. MARKWEST ENERGY FINANCE CORPORATION Underwriting AgreementUnderwriting Agreement • March 3rd, 2015 • Markwest Energy Partners L P • Crude petroleum & natural gas • New York
MarkWest Energy Partners, L.P., a Delaware limited partnership (the “Partnership”), and MarkWest Energy Finance Corporation, a Delaware corporation (“Finance Corp” and, together with the Partnership, the “Issuers”), propose to issue and sell to the several underwriters listed in Schedule III hereto (the “Underwriters”), for whom you are acting as representative (the “Representative”), $650,000,000 aggregate principal amount of their 4.875% Senior Notes due 2024 (the “Notes”). The Notes will be issued pursuant to the Indenture (the “Base Indenture”) dated as of November 2, 2010 among the Issuers, the Guarantors (as defined below) and Wells Fargo Bank, National Association, as trustee (the “Trustee”), and will be guaranteed on an unsecured senior basis by each of the Guarantors (the “Guarantees” and, together with the Notes, the “Securities”). The term “Indenture,” as used herein means the Base Indenture, as amended and supplemented by the Thirteenth Supplemental Indenture (the “Thirteen
