10.19(23) Amended and Restated Form of Indemnification

Exhibit Number
10.19(23)
Description
Amended and Restated Form of Indemnification Agreement dated October 26, 2007
by and between MarkWest Energy Partners, L.P. and each non-employee director
and executive officer of the General Partner, including the following named
executive officers: Frank Semple, President and Chief Executive Officer; Nancy
Buese, Senior Vice President and Chief Financial Officer; Randy Nickerson, Senior
Vice President and Chief Commercial Officer; John Mollenkopf, Senior Vice
President and Chief Operations Officer; C. Corwin Bromley, Senior Vice President,
General Counsel and Secretary and Andrew Schroeder, Vice President and
Treasurer.
10.20(27)+
Gas Processing Agreement dated as of November 1, 2007, by and between
MarkWest Javelina Company and CITGO Refining and Chemicals Company, L.P.
10.21(26)+
Amendment to Gas Processing Agreement dated as of December 11, 2007, by and
between MarkWest Javelina Company and CITGO Refining and Chemicals
Company, L.P.
10.22(24)
Amended Class B Membership Interest Contribution Agreement dated as of
October 26, 2007, to Agreement and Plan of Redemption and Merger by and among
the Partnership, MarkWest Hydrocarbon, Inc. and MWEP, L.L.C.
10.23(26)
Omnibus Termination Agreement dated as of November 16, 2007, by and between
MarkWest Energy Appalachia, L.L.C. and Equitable Production Company and
Equitable Gathering LLC.
10.24(27)+
Natural Gas Liquids Transportation, Fractionation, and Marketing Agreement dated
as of November 16, 2007, by and between MarkWest Energy Appalachia, L.L.C. and
Equitable Gathering LLC.
10.25(26)
Assignment and Bill of Sale and Assumption Agreement dated as of November 16,
2007, by and between MarkWest Energy Appalachia, L.L.C. and Equitable
Production Company and Equitable Gathering LLC.
10.26(26)
Second Amendment to the Gas Processing Agreement dated as of December 26,
2007, by and between MarkWest Energy Appalachia, L.L.C. and MarkWest
Hydrocarbon, Inc.
10.27(28)
Credit Agreement dated as of February 20, 2008 among MarkWest Energy
Partners, L.P., Royal Bank of Canada as Administrative Agent and Collateral Agent,
JPMorgan Chase Bank, N.A. and Wachovia Bank, National Association, as
Co-Syndication Agents, Fortis Capital Corp., SunTrust Bank and U.S. Bank National
Association, as Documentation Agents, RBC Capital Markets, as Sole Lead
Arrangers and Sole Book Running Manager, and the lenders party thereto.
10.28(29)
MarkWest Energy Partners, L.P. 2008 Long-Term Incentive Plan.
10.29(32)
Form of Second Amended and Restated Indemnification Agreement dated April 24,
2008 by and among MarkWest Energy Partners, L.P., MarkWest Energy GP, L.L.C.,
and each director and officer of MarkWest Energy GP, L.L.C., including the
following named executive officers: Frank Semple, President and Chief Executive
Officer; Nancy Buese, Senior Vice President and Chief Financial Officer; Randy
Nickerson, Senior Vice President and Chief Commercial Officer; John Mollenkopf,
Senior Vice President and Chief Operations Officer; and C. Corwin Bromley, Senior
Vice President, General Counsel and Secretary.
10.30(32)
1996 Stock Incentive Plan for MarkWest Hydrocarbon, Inc.
166