MarkWest Energy Partners Announces Release Date for Second Quarter 2013 Financial Results

  MarkWest Energy Partners Announces Release Date for Second Quarter 2013
  Financial Results

Business Wire

DENVER -- July 14, 2013

MarkWest Energy Partners, L.P. (NYSE: MWE) (MarkWest) will announce second
quarter 2013 financial results after market close on Wednesday, August 7,
2013, and will host a conference call to discuss the results at 12:00 p.m. ET
on Thursday, August 8, 2013.

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

A replay of the conference call will be accessible on the MarkWest website or
by dialing (866) 454-1418 (no passcode required).

MarkWest Energy Partners, L.P. is a master limited partnership engaged in the
gathering, processing and transportation of natural gas; the gathering,
transportation, fractionation, storage and marketing of natural gas liquids;
and the gathering and transportation of crude oil. MarkWest has a leading
presence in many unconventional gas plays including the Marcellus Shale, Utica
Shale, Huron/Berea Shale, Haynesville Shale, Woodford Shale and Granite Wash

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 MarkWest believes that the expectations
reflected in the forward-looking statements are reasonable, MarkWest can give
no assurance that such expectations will prove to be correct. The
forward-looking statements involve risks and uncertainties that affect
operations, financial performance, and other factors as discussed in filings
with the Securities and Exchange Commission (SEC). Among the factors that
could cause results to differ materially are those risks discussed in the
periodic reports filed with the SEC, including MarkWest’s Annual Report on
Form 10-K for the year ended December 31, 2012 and our Quarterly Report on
Form 10-Q for the quarter ended March 31, 2013. 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.” MarkWest
does not undertake any duty to update any forward-looking statement except as
required by law.


MarkWest Energy Partners, L.P.
Frank Semple, 866-858-0482
Chairman, President & CEO
Nancy Buese, 866-858-0482
Senior VP & CFO
Josh Hallenbeck, 866-858-0482
VP of Finance & Treasurer
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