DENVER, Jul 06, 2011 (BUSINESS WIRE) --
MarkWest Energy Partners, L.P. (NYSE: MWE) will announce second quarter
2011 financial results after market close on Monday, August 8, 2011, and
will host a conference call to discuss the results at 4:00 p.m. ET on
Tuesday, August 9, 2011.
The conference call can be accessed by dialing (800) 475-0218 (passcode
"MarkWest") or via webcast by accessing the "Investor Relations" page of
the MarkWest website at www.markwest.com.
A replay of the conference call will be accessible on the MarkWest
website or by dialing (866) 516-0668 (no passcode required).
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 and fractionator 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, 2010. 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.

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