MarkWest Hydrocarbon, Inc. and MarkWest Energy Partners, L.P. Conference Call and Webcast

In conjunction with MarkWest Hydrocarbon, Inc.'s (Amex: MWP - News) and MarkWest Energy Partners, L.P.'s (Amex: MWE - News) second quarter earnings release, you are invited to listen to their conference call that will be broadcast live over the Internet on Thursday, August 5, at 4 p.m. EDT.

The Second Quarter Conference Call and webcast will be on Thursday, August 5, at 4 p.m. EDT at the company website or live call via telephone 1-888-515-2781 access code 291963.

To listen live via webcast simply log on to the web site.

If you are unable to participate during the live webcast, the call will be archived on the Web site above.