MarkWest Energy Partners L.P.

Public Company, Headquarters Location
1515 Arapahoe St., Tower 2, Ste. 700, Denver, CO 80202-3150, United States
(800)730-8388, (303)925-9200, (303)290-8769 fax, http://www.markwest.com

Primary SIC: Crude Petroleum And Natural Gas, Primary NAICS: Crude Petroleum and Natural Gas Extraction
Description: MarkWest Energy Partners LP is a publicly-traded Delaware limited partnership formed on January 25, 2002. It is a master limited partnership engaged in the gathering, compressing, treating, processing and transportation of natural gas; the transportation, fractionation, storage and marketing of natural gas liquids (NGLs); and the gathering and transportation of crude oil. The partnership conducts its operations in three geographical operating segments: the Southwest, the Northeast and the Gulf Coast. On February 21, 2008, MarkWest Energy Partners completed its plan of redemption and merger with MarkWest Hydrocarbon Inc. and MWEP LLC, a wholly-owned subsidiary of the partnership, pursuant to which MarkWest Hydrocarbon Inc. was merged into the partnership. On January 22, 2009, the company entered into an agreement to form a joint venture with an affiliate of NGP Midstream and Resources LP. Additionally, during the year ended December 31, 2008, the company acquired the subsidiary of PetroQuest Energy LLC. MarkWest Energy Partners is headquartered in Denver, Colo.Mining: Exploration and production of natural gas.