MarkWest Energy Partners and The Energy & Minerals Group Announce Major Expansion of Hopedale Fractionation Complex

  MarkWest Energy Partners and The Energy & Minerals Group Announce Major
  Expansion of Hopedale Fractionation Complex

Business Wire

DENVER -- June 4, 2014

MarkWest Energy Partners, L.P. (NYSE: MWE) (“MarkWest or “the Partnership”)
and The Energy & Minerals Group (“EMG”), today announced plans to add
additional capacity at their Hopedale fractionation and marketing complex
(“Hopedale complex”) in Harrison County, Ohio in order to meet growing natural
gas liquids (NGLs) production in the Utica and Marcellus Shales under new
contracted commitments from numerous producer customers. The Hopedale complex
is jointly owned by a subsidiary of MarkWest and MarkWest Utica EMG, L.L.C.
(“MarkWest Utica EMG”) a joint venture between the Partnership and EMG. The
expansion will double the propane and heavier fractionation capacity at the
Hopedale complex to 120,000 barrels per day (Bbl/d) and is expected to be
operational in the first quarter of 2015.

MarkWest and MarkWest Utica EMG are committed to developing world-class
fractionation capacity in the Northeast, as these facilities are critical for
producers achieving the highest price for their valuable NGLs. Once the
Hopedale expansion is complete, MarkWest will operate 300,000 Bbl/d of ethane
and heavier fractionation capacity at four complexes in the Northeast. The
Partnership also has an NGL gathering pipeline connecting its Hopedale complex
to its industry-leading NGL infrastructure in the Marcellus Shale. NGL
takeaway solutions to the Gulf Coast and international markets will be
complementary to existing fractionation infrastructure and will provide
producers with additional market outlets that are crucial to the long-term
development of the region.

“Together with EMG, our expansion of fractionation capacity in Ohio is a
resounding commitment to deliver exceptional midstream services and NGL
solutions in the Northeast,” stated Frank Semple, Chairman, President, and
Chief Executive Officer of MarkWest. “As Northeast NGL production continues to
grow, in-basin fractionation will be essential to support the ongoing
development plans of our producers in the Utica and Marcellus.”

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.

Source: MarkWest Energy Partners, L.P.

EMG is the management company for a series of specialized private equity
funds. The Firm was founded by John Raymond (majority owner and CEO) and John
Calvert in 2006. EMG focuses on investing across various facets of the global
natural resource industry including the upstream and midstream segments of the
energy complex. EMG has approximately $13.9 billion of regulatory assets under
management (RAUM) and approximately $6.5 billion in commitments have been
allocated across the energy sector since inception. For additional information
on EMG, please contact Alexandra Coolidge at713-579-5029.


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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