MarkWest Energy Partners to Present at Upcoming Conferences

DENVER--(Business Wire)--
MarkWest Energy Partners, L.P. (NYSE: MWE) today announced that representatives
from MarkWest will present at the following conferences.

* Bank of America Merrill Lynch Energy Conference in New York on November 17,
2009.
* RBC Capital Markets MLP Conference in Dallas on November 19, 2009.
* Bank of America Merrill Lynch 2009 Credit Conference in New York on December
2, 2009.
* J.P. Morgan SMid Cap Conference in New York on December 3, 2009.
* Wells Fargo Securities 8th Annual Pipeline & MLP Symposium in New York on
December 8, 2009.

The presentation materials will be available on MarkWest`s website at
www.markwest.com under "Investor Relations / Presentations."

MarkWest Energy Partners, L.P. is a master limited partnership engaged in the
gathering, transportation, and processing of natural gas; the transportation,
fractionation, marketing, and storage of natural gas liquids; and the gathering
and transportation of crude oil. MarkWest has extensive natural gas gathering,
processing, and transmission operations in the southwest, Gulf Coast, and
northeast regions of the United States, including the Marcellus Shale, and is
the largest natural gas processor in the Appalachian region.

This press release includes "forward-looking statements."All statements other
than statements of historical facts included or incorporated herein may
constitute forward-looking statements.Actual results could vary significantly
from those expressed or implied in such statements and are subject to a number
of risks and uncertainties.Although we believe that the expectations reflected
in the forward-looking statements are reasonable, we can give no assurance that
such expectations will prove to be correct.The forward-looking statements
involve risks and uncertainties that affect our operations, financial
performance, and other factors as discussed in our filings with the Securities
and Exchange Commission.Among the factors that could cause results to differ
materially are those risks discussed in the periodic reports we file with the
SEC, including our Annual Report on Form 10-K for the year ended December 31,
2008, and our Quarterly Report on Form 10-Q for the quarter ended September 30,
2009.You are urged to carefully review and consider the cautionary statements
and other disclosures made in those filings, specifically those under the
heading "Risk Factors."We do not undertake any duty to update any
forward-looking statement except as required by law.

MarkWest Energy Partners, L.P.
Frank Semple, Chairman, 866-858-0482
President & CEO
or
Nancy Buese, 866-858-0482
Senior VP and CFO
or
Dan Campbell, 866-858-0482
Treasurer & IR Officer
investorrelations@markwest.com

Copyright Business Wire 2009