MarkWest Energy Partners, L.P. (MWE) announced the closing of its previously announced public offering of 6,900,000 common units at $50.72 per common unit, which includes 900,000 common units purchased pursuant to the full exercise of the underwriters’ option to purchase additional common units.

MarkWest intends to use the net proceeds from the offering, after deducting underwriting discounts, commissions and offering expenses, of approximately $338.3 million to fund its capital expenditure program, for general working capital and for other general partnership purposes.

Barclays, BofA Merrill Lynch, Citigroup, Goldman, Sachs & Co., UBS Investment Bank, J.P. Morgan and RBC Capital Markets are acting as joint book-running managers for the offering. The offering is being made only by means of a prospectus supplement and accompanying base prospectus.