MarkWest Energy Offers 6M Units

MarkWest Energy Partners, L.P.

announced today that it is commencing a public offering of 6,000,000 common units. MarkWest intends to grant the underwriters a 30-day option to purchase a maximum of 900,000 additional common units to cover the underwriters' sale of additional common units, if any. MarkWest intends to use the net proceeds from the offering and from any exercise of the underwriters' option to purchase additional common units to fund its capital expenditure program, for general working capital and for other general partnership purposes.