MarkWest Energy Partners Announces 2013 Schedule K-1 Availability

  MarkWest Energy Partners Announces 2013 Schedule K-1 Availability

Business Wire

DENVER -- February 19, 2014

MarkWest Energy Partners, L.P. (NYSE:MWE) (MarkWest) announced today that its
2013 tax package, which includes the Schedule K-1 (Form 1065), will be
available online on March 4, 2014 and may be accessed via MarkWest’s website
at under “Investor Relations/K-1 (Tax) Info”. MarkWest will
commence mailing the tax package on the same day.

For additional information, unitholders may call the toll free MarkWest Tax
Support Line at (800) 232-0011 on weekdays between 8 a.m. and 5 p.m. CST.

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 September 30, 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
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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