MWP Markwest Hydrocarbon,

Reminder - MarkWest Hydrocarbon, Inc. Invites You to Join Their Conference Call on the Web DENVER, Nov. 9 /PRNewswire-FirstCall/ -- In conjunction with MarkWest Hydrocarbon, Inc.'s (AMEX:MWP) third quarter earnings release, you are invited to listen to their conference call that will be broadcast live over the Internet on Tuesday, November 9, at 4 p.m. EST with Frank Semple, President & CEO; Jim Ivey, Chief Financial Officer; Ted Smith, VP & Chief Accounting Officer; and Andy Schroeder, VP of Finance & Treasurer. What: MarkWest Hydrocarbon, Inc. Third Quarter Conference Call When: Tuesday, November 9, at 4 p.m. EST Where: http://www.markwest.com/ How: Live over the Internet -- Simply log on to the web site address above. Live call via telephone: 1-800-257-7063 Contact: Rhonda Bowling of MarkWest Hydrocarbon, Inc., +1-303-925-9241 If you are unable to participate during the live webcast, the call will be archived on the Web site above. Alternatively, a replay will be available through Tuesday, November 16 at 800-405-2236, Passcode: 11014489#. The call will also be archived on http://www.prnewswire.com/. MarkWest Hydrocarbon, Inc. (AMEX:MWP), owns and controls the general partner of, and owns a 23% limited partner interest in, MarkWest Energy Partners, L.P. (AMEX:MWE). MarkWest Energy Partners, L.P. is engaged in the gathering, transmission, processing, fractionation and marketing of hydrocarbons. MarkWest Hydrocarbon, Inc. is also engaged in the marketing of natural gas and natural gas liquids. DATASOURCE: MarkWest Hydrocarbon, Inc. CONTACT: Rhonda Bowling of MarkWest Hydrocarbon, Inc., +1-303-925-9241 Web site: http://www.markwest.com/

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