MWP Markwest Hydrocarbon,

MarkWest Hydrocarbon Announces Closing of the Sale of Its Wholly Owned Subsidiary, MarkWest Resources Canada DENVER, Dec. 2 /PRNewswire-FirstCall/ -- MarkWest Hydrocarbon, Inc. , today announced it closed the sale of its wholly owned subsidiary, MarkWest Resources Canada Corp., to Advantage Energy Income Fund for CDN $102.5 million less debt and other liabilities assumed by Advantage. MarkWest previously announced on November 12, 2003, that it had entered into a Purchase and Sale Agreement with Advantage Energy Income Fund for sale of the subsidiary. MarkWest Hydrocarbon also announced it has entered into an agreement to sell its subsidiary, MarkWest Canadian Midstream Services Inc. for CDN $2.6 million. Upon closing of the sale of this subsidiary, MarkWest Hydrocarbon will no longer own any Canadian oil and gas properties. MarkWest Hydrocarbon, Inc. (AMEX:MWP), operates in two business segments: exploration and production of natural gas, and midstream services. The exploration and production segment produces natural gas in Alberta, Canada, and in Michigan. In the midstream services segment, which is principally conducted through our 43.6 percent-owned affiliate, MarkWest Energy Partners, L.P. (AMEX:MWE), we gather natural gas from the wellhead and process the natural gas to remove impurities and the valuable natural gas liquids (NGLs). MarkWest Hydrocarbon markets the NGLs. This press release includes "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical facts included or incorporated herein may constitute forward-looking statements. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we can give no assurance that such expectations will prove to be correct. The forward-looking statements involve risks and uncertainties that affect our operations, financial performance and other factors as discussed in our filings with the Securities and Exchange Commission. Among the factors that could cause results to differ materially are those risks discussed in our Form 10-K for the year ended December 31, 2002, and our SEC filings for 2003. DATASOURCE: MarkWest Hydrocarbon, Inc. CONTACT: John Fox, CEO, or Frank Semple, President, or Donald Heppermann, Exec. VP and CFO, all of MarkWest Hydrocarbon, Inc., +1-800-730-8388, or +1-303-290-8700, or fax, +1-303-290-8769, Web site: http://www.markwest.com/

Copyright