MARKWEST ENERGY PARTNERS, L.P. MARKWEST ENERGY FINANCE CORPORATION Underwriting AgreementUnderwriting Agreement • March 3rd, 2011 • 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 you (the “Underwriter”), $200,000,000 principal amount of their 6.5% Senior Notes due 2021 (the “Notes”). The Notes will be issued pursuant to an 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 includes the Base Indenture and the Second Supplemental Indenture dated February 24, 2011 (the “Second Supplemental Indenture”). The Notes constitute “Additional Notes” (as such term is defined in the Indenture) under the Indenture. The Com
