Reminder - MarkWest Hydrocarbon, Inc. Invites You to Join Their Conference Call on the Web

DENVER, May 8  /PRNewswire-FirstCall/ -- You are invited to listen to MarkWest Hydrocarbon, Inc.'s 2006 first quarter earnings conference call that will be broadcast live over the Internet on Tuesday, May 9, 2006, at 2:00 p.m. (MDT) with Frank Semple, President and Chief Executive Officer; James Ivey, Chief Financial Officer; Nancy Masten, Sr. Vice President and Chief Accounting Officer; Randy Nickerson, Sr. Vice President Corporate Development; and Andrew Schroeder, Vice President Finance and Treasurer.

  What:       MarkWest Hydrocarbon, Inc.'s 2006 First Quarter Earnings
              Conference Call

  When:       Tuesday, May 9, 2006, at 2:00 p.m. (MDT)

  Where:      http://www.markwest.com/

  How:        Live over the Internet -- Simply log on to the web site
              address above.

  Live Call:  Via telephone at [phone]

  Contact:    Valerie Lewis of MarkWest Hydrocarbon, Inc.
              [phone]



If you are unable to participate during the live Webcast, the call will be archived on the website above.  Alternatively, a replay will be available through May 16, 2006 at [phone], Passcode: 11059923#.  The call will also be archived on http://www.prnewswire.com/.

MarkWest Hydrocarbon, Inc. (AMEX:MWP) controls and operates MarkWest Energy Partners, L.P. (AMEX:MWE), a publicly traded limited partnership engaged in the gathering, processing and transmission of natural gas; the transportation, fractionation and storage of natural gas liquids; and the gathering and transportation of crude oil.  We also market natural gas and NGLs. 

DATASOURCE: MarkWest Hydrocarbon, Inc.



CONTACT:  Valerie Lewis of MarkWest Hydrocarbon, Inc., [phone]



Web site:  http://www.markwest.com/

Copyright