Type	Name	Date
Merger agreement	Agreement and Plan of Redemption and Merger, by and among MarkWest Hydrocarbon, Inc., MarkWest Energy Partners, L.P. and MWEP, L.L.C	09/06/2007
Exchange agreement	Exchange Agreement, by and among MarkWest Hydrocarbon, Inc., MarkWest Energy Partners, L.P. and MarkWest Energy, GP L.L.C	09/06/2007
Voting agreement	Voting Agreement, by and among MarkWest Energy Partners, L.P., John M. Fox and MWHC Holding, Inc	09/06/2007
Contribution agreement	Class B Membership Interest Contribution Agreement, by and among MarkWest Energy Partners, L.P. and the sellers name therein	09/06/2007
Acquisition / asset purchase agreement	Asset and Sale Agreement, among MarkWest Energy Partners and El Paso Corporation	09/21/2005
Acquisition / asset purchase agreement	Asset and Sale Agreement, among MarkWest Energy Partners and Valero Energy Corp	09/21/2005
Acquisition / asset purchase agreement	Purchase and Sale Agreement effective as of January 1, 2005 between MarkWest Energy Partners L.P. and Enterprise Products Operating L.P	04/06/2005
Acquisition / asset purchase agreement	Asset Purchase and Sale Agreement and Addendum, thereto, by and between American Central Eastern Texas Gas Company Limited Partnership, ACGC Gathering Company, L.L.C. and MarkWest Energy East Texas Gas Company L.P	10/12/2004
Acquisition / asset purchase agreement	Unit Purchase Agreement among MarkWest Energy Partners, L.P., and MarkWest Energy GP, L.L.C. and each of Kayne Anderson Energy Fund II, L.P., Kayne Anderson Capital Income Partners, L.P., Kayne Anderson MLP Fund, L.P., Kayne Anderson Capital Income Fund, LTD., Kayne Anderson Income Partners, L.P., HFR RV Performance Master Trust, Tortoise Energy Infrastructure Corporation and Energy Income and Growth Fund, as Purchasers	10/12/2004
Acquisition / asset purchase agreement	Clarification and Amending Agreement re: Share Purchase Agreement, between MarkWest Hydrocarbon, Inc. and Advantage Oil & Gas Ltd	12/17/2003
Acquisition / asset purchase agreement	Share Purchase Agreement, by and among MarkWest Hydrocarbon, Inc. and Advantage Oil & Gas Ltd	12/17/2003
Acquisition / asset purchase agreement	Purchase and Sale Agreement, by and among MarkWest Hydrocarbon, Inc., MarkWest Resources, Inc. and XTO Energy Inc	07/15/2003