MarkWest Energy Partners LP (NYSE: MWE) and its subsidiary, MarkWest Energy Finance Corp., have priced its public offering of $1 billion in aggregate principal amount of 4.5% senior unsecured notes due 2023.

Net proceeds will be used to fund the redemption of all of its outstanding 8.75% senior notes due 2018, and a portion of its 6.5% senior notes due 2021 and 6.25% senior notes due 2022, with the balance of such proceeds to be used to fund the Partnership’s capital expenditure program, for general working capital, and for other ...