MarkWest Energy Partners Announces Retirement of Keith E. Bailey and Nomination of William A. Bruckmann III to Board of

  MarkWest Energy Partners Announces Retirement of Keith E. Bailey and
  Nomination of William A. Bruckmann III to Board of Directors

Business Wire

DENVER -- April 25, 2014

MarkWest Energy Partners, L.P. (NYSE: MWE) (“MarkWest” and “the Partnership”)
today announced that Keith E. Bailey has elected to retire from the Board of
Directors of the Partnership’s General Partner, MarkWest Energy GP, LLC,
effective June 6, 2014, the date of the Partnership’s 2014 Annual Meeting of
Common Unitholders. Mr. Bailey has served as a member of the Board of
Directors since January 2005. Mr. Bailey is currently serving as Chairman of
the Board’s Compensation Committee and is also on the Board’s Nominating and
Corporate Governance Committee.

“On behalf of MarkWest, I would like to thank Keith for his service over the
past nine years. His guidance and leadership has played an influential role in
establishing MarkWest as a leading growth-oriented master limited
partnership,” stated Frank Semple, Chairman, President and Chief Executive
Officer of MarkWest. “He served a key role in the ongoing development of our
strategic vision to deliver top-tier midstream services and innovative
customer-focused solutions. We wish Keith the best in his future endeavors.”

In conjunction with Mr. Bailey’s upcoming retirement, the Partnership is
pleased to announce that William A. Bruckmann III has been nominated to stand
for election to serve as a member of the General Partner’s Board of Directors
at the Partnership’s Annual Meeting of Common Unitholders on June 6, 2014. Mr.
Bruckmann’s professional career consists of extensive energy and
investment-related experience. He has served as Director of Duncan Energy
Partners, L.P. from February 2007 to September 2011 and Director of Williams
Energy Partners, L.P. (now Magellan Midstream Partners, L.P.) from March 2001
to June 2003. He has been self-employed as a consultant since October 2000 and
previously held positions in investment and corporate banking with
Manufacturers Hanover, Chemical Securities, and Chase Securities.

“We are very excited to offer Bill the opportunity to be elected as the newest
member of our board,” commented Frank Semple. “His prior natural gas pipeline
and midstream experience, coupled with strong capital markets expertise, will
be instrumental as we continue to execute on our growth strategy and deploy
capital investments to support producers in many of America’s most productive
and exciting resource plays.”

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, 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
Executive VP & CFO
Josh Hallenbeck, 866-858-0482
VP of Finance & Treasurer
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