Class B Membership Interest Contribution Agreement Sample Contracts

AMENDED AND RESTATED CLASS B MEMBERSHIP INTEREST CONTRIBUTION AGREEMENT dated as of October 26, 2007 by and among MARKWEST ENERGY PARTNERS, L.P., and THE SELLERS NAMED HEREIN

Class B Membership Interest Contribution Agreement • November 13th, 2007 • Markwest Energy Partners L P • Crude petroleum & natural gas • Colorado

• Contract Type
  Class B Membership Interest Contribution Agreement
• Filed
  November 13th, 2007
• Company
  Markwest Energy Partners L P
• Industry
  Crude petroleum & natural gas
• Jurisdiction
  Colorado

THIS AMENDED AND RESTATED CLASS B MEMBERSHIP INTEREST CONTRIBUTION AGREEMENT, dated as of October 26, 2007 (this “Agreement”), is entered into by and among each of the Sellers listed in Schedule 2.1 attached hereto (each referred to herein as a “Seller” and collectively, the “Sellers”), and MarkWest Energy Partners, L.P., a Delaware limited partnership (“Buyer”). The Sellers and the Buyer are collectively referred to herein as the “Parties,” with each a “Party.”

CLASS B MEMBERSHIP INTEREST CONTRIBUTION AGREEMENT dated as of September 5, 2007 by and among MARKWEST ENERGY PARTNERS, L.P., and THE SELLERS NAMED HEREIN

Class B Membership Interest Contribution Agreement • September 6th, 2007 • Markwest Energy Partners L P • Crude petroleum & natural gas • Colorado

• Contract Type
  Class B Membership Interest Contribution Agreement
• Filed
  September 6th, 2007
• Company
  Markwest Energy Partners L P
• Industry
  Crude petroleum & natural gas
• Jurisdiction
  Colorado

THIS CLASS B MEMBERSHIP INTEREST CONTRIBUTION AGREEMENT, dated as of September 5, 2007 (this "Agreement"), is entered into by and among each of the Sellers listed in Schedule 2.1 attached hereto (each referred to herein as a "Seller" and collectively, the "Sellers"), and MarkWest Energy Partners, L.P., a Delaware limited partnership ("Buyer"). The Sellers and the Buyer are collectively referred to herein as the "Parties," with each a "Party."

AMENDMENT NO. 4 TO AMENDED AND RESTATED CLASS B MEMBERSHIP INTEREST CONTRIBUTION AGREEMENT

Class B Membership Interest Contribution Agreement • March 3rd, 2008 • Markwest Energy Partners L P • Crude petroleum & natural gas

• Contract Type
  Class B Membership Interest Contribution Agreement
• Filed
  March 3rd, 2008
• Company
  Markwest Energy Partners L P
• Industry
  Crude petroleum & natural gas

This Amendment No. 4 to the Amended and Restated Class B Membership Interest Contribution Agreement dated as of October 26, 2007 (this “Amendment No. 4”) is dated effective February 19, 2008, and is by and between MarkWest Energy Partners, L.P. (“Buyer”), Frank M. Semple (“Semple”), John M. Fox (“Fox”), John C. Mollenkopf (“Mollenkopf”), Randy S. Nickerson (“Nickerson”), Kevin Kubat (“Kubat”), Jan Kindrick (“Kindrick”), and Nancy K. Buese (“Buese”).