MarkWest Energy Partners, LP (MWE)

Exhibit No.

Description of Exhibit

     99.1

Press release dated October 5, 2009, announcing decision regarding option to acquire equity interest in Midcontinent Express Pipeline.

Exhibit No.

Description of Exhibit

99.1

Press release dated September 15, 2009, announcing execution of agreements with Chesapeake Appalachia, L.L.C. and Statoil Natural Gas LLC and the planned construction of a second major processing complex in the Marcellus.

Exhibit No.

Description of Exhibit

99.1

Press release dated September 1, 2009, announcing sale of steam methane reformer.

Exhibit No.

Description of Exhibit

10.1

Executive Employment Agreement with Frank M. Semple dated September 5, 2007.

10.2

Form of Executive Employment Agreement with the named executive officers dated September 5, 2007.

4.2(1)

Unit Purchase Agreement dated April 9, 2007 by and among MarkWest Energy Partners, L.P., MarkWest Energy G.P., L.L.C., and each of Kayne Anderson MLP Investment Company, GPS Income Fund, L.P., GPS High Yield Equities Fund, L.P., GPS New Equity Fund, L.P., Agile Performance Fund, L.L.C., Tortoise Energy Infrastructure Corporation, Tortoise Energy Capital Corporation, Royal Bank of Canada, Structured Finance Americas, L.L.C., The Cushing MLP Opportunity Fund I, L.P., and ZLP Fund, L.P. as purchasers.

4.1(1)

Registration Rights Agreement dated April 9, 2007 by and between MarkWest Energy Partners, L.P., and each of Kayne Anderson MLP Investment Company, GPS Income Fund, L.P., GPS High Yield Equities Fund, L.P., GPS New Equity Fund, L.P., Agile Performance Fund, L.L.C., Tortoise Energy Infrastructure Corporation, Tortoise Energy Capital Corporation, Royal Bank of Canada, Structured Finance Americas, L.L.C., The Cushing MLP Opportunity Fund I, L.P., and ZLP Fund, L.P. as purchasers.

31.1

Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2

Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1

Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2

Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

10.1+

Construction, Operation and Gas Gathering Agreement dated as of September 21, 2006 between MarkWest Western Oklahoma Gas Company LLC and Newfield Exploration Mid-Continent Inc.

31.1

Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2

Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1

Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2

Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

MarkWest Energy Partners, L.P.
(Registrant)

By:

MarkWest Energy GP, L.L.C.,
Its General Partner

/s/ FRANK M. SEMPLE

Date: November 6, 2006

Frank M. Semple
President and Chief Executive Officer

/s/ NANCY K. BUESE

Date: November 6, 2006

 Nancy K. Buese
Chief Financial Officer

The exhibit identified below is filed as part of this report:

Exhibit 99.1

Javelina Conference Call Script — Dated September 22, 2005

31.1

Chief Executive Officer Certification pursuant to Rule 13a-14(a) of the Securities Exchange Act.

31.2

Chief Accounting Officer Certification pursuant to Rule 13a-14(a) of the Securities Exchange Act.

31.3

Chief Financial Officer Certification pursuant to Rule 13a-14(a) of the Securities Exchange Act.

32.1

Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2

Certification of the Chief Accounting Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.3

Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

31.1

Chief Executive Officer Certification pursuant to Rule 13a-14(a) of the Securities Exchange Act.

31.2

Chief Financial Officer Certification pursuant to Rule 13a-14(a) of the Securities Exchange Act.

31.3

Chief Accounting Officer Certification pursuant to Rule 13a-14(a) of the Securities Exchange Act.

32.1

Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2

Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.3

Certification of the Chief Accounting Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 99.1

Press Release of the American Stock Exchange Compliance Letter.

Exhibit 99.1

Press Release dated March 31, 2005.

Exhibit 10.1

Purchase and Sale Agreement effective as of January 1, 2005 between MarkWest Energy Partners L.P. and Enterprise Products Operating L.P.