2012 News Releases

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MarkWest Energy Partners, L.P. at NAPTP MLP Investor Conference (Live)
05/23/12 at 4:30 p.m. ET
MarkWest Energy Partners, L.P. at NAPTP MLP Investor Conference
Wednesday, May 23, 2012 4:30 p.m. ET  
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05/17/12MarkWest Energy Partners to Present at the National Association of Publicly Traded Partnerships 2012 MLP Investor Conference
DENVER--(BUSINESS WIRE)--May. 17, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today that Frank Semple, Chairman, President and CEO, will present at the National Association of Publicly Traded Partnerships (NAPTP) 2012 Master Limited Partnership Investor Conference at 4:30 p.m. Eastern Time on Wednesday, May 23, 2012, at the Hyatt Regency Greenwich in Old Greenwich, Connecticut. Interested parties can listen to a live we... 
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05/14/12MarkWest Energy Partners Announces Closing of Public Offering of Common Units
DENVER--(BUSINESS WIRE)--May. 14, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today the closing of its previously announced public offering of 8,000,000 common units at $55.28 per common unit. MarkWest has granted the underwriters a 30-day option to purchase up to 1,200,000 additional common units. MarkWest intends to use the net proceeds from the offering, after deducting underwriting discounts, commissions and offering expenses, of ... 
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05/09/12MarkWest Energy Partners Announces Pricing of Public Offering of Common Units
DENVER--(BUSINESS WIRE)--May. 9, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today that it priced a public offering of 8,000,000 common units at $55.28 per common unit. MarkWest has granted the underwriters a 30-day option to purchase up to 1,200,000 additional common units to cover the underwriters’ sale of additional common units, if any. MarkWest intends to use the net proceeds from the offering, after deducting underwriting discou... 
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05/08/12MarkWest Energy Partners Announces Public Offering of Common Units
DENVER--(BUSINESS WIRE)--May. 8, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today that it is commencing a public offering of 8,000,000 common units. MarkWest intends to grant the underwriters a 30-day option to purchase a maximum of 1,200,000 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’ ... 
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05/07/12MarkWest Energy Partners Reports Record Quarterly Distributable Cash Flow, Increases Quarterly Common Unit Distribution by 17.9 Percent
DENVER--(BUSINESS WIRE)--May. 7, 2012-- MarkWest Energy Partners, LP (NYSE: MWE) (the Partnership) today reported record quarterly cash available for distribution to common unitholders, or distributable cash flow (DCF), of $109.2 million for the three months ended March 31, 2012, compared to $76.1 million for the three months ended March 31, 2011. DCF for the three months ended March 31, 2012 represents 135 percent coverage of the first quarter ... 
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05/07/12MarkWest Energy Partners Revises Date for First Quarter 2012 Earnings Conference Call. The Conference Call Will Include a Discussion of the Keystone Midstream Acquisition.
DENVER--(BUSINESS WIRE)--May. 7, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) has revised the date it will issue first quarter 2012 financial results earnings release from Wednesday, May 9, 2012 to after market close on Monday, May 7, 2012. The date and time of the conference call were also revised, and MarkWest will now host a conference call to discuss its quarterly results and the Keystone acquisition at 12:00 p.m. ET on Tuesday, May 8, 2012.... 
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05/07/12MarkWest Energy Partners Announces Acquisition of Keystone Midstream Services in Liquids Rich Area of Marcellus Shale, Extension of its NGL Gathering Network, and Utica Shale Letter Agreement
DENVER--(BUSINESS WIRE)--May. 7, 2012-- MarkWest Energy Partners, L.P. (MarkWest) (NYSE: MWE) today announced that it is acquiring 100% of the ownership interests of Keystone Midstream Services, LLC (Keystone), for consideration of $512 million. The transaction is expected to close during the second quarter of 2012. Keystone is owned by Stonehenge Energy Resources, LP, and affiliates of Rex Energy Corporation (Rex Energy) (NASDAQ: REXX) and S... 
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05/04/12MarkWest Energy Partners Announces Significant Long-Term Fee-Based Agreements with Chesapeake Energy and Antero Resources to Expand its Marcellus Shale Midstream Facilities in West Virginia
DENVER--(BUSINESS WIRE)--May. 4, 2012-- MarkWest Energy Partners, L.P. (MarkWest) (NYSE: MWE) today announced the execution of two major agreements related to its ongoing development of the hydrocarbon-rich area of the Marcellus shale. The first agreement is a long-term fee-based arrangement with affiliates of Chesapeake Energy Corporation (NYSE:CHK) to expand its Marcellus gas processing capacity to support Chesapeake’s rapidly growing rich natural ... 
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05/01/12MarkWest Announces Annual Meeting of Common Unitholders and Investor Conference
DENVER--(BUSINESS WIRE)--May. 1, 2012-- MarkWest Energy Partners, L.P. (NYSE:MWE) announced today that its 2012 Annual Meeting of Common Unitholders will be held on Friday, June 1, 2011, at 9:00 a.m. Eastern time at the Jumeirah Essex House located at 160 Central Park South in New York. The record date for determination of unitholders entitled to vote at the meeting was April 4, 2012. Additional information, including details of the bu... 
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04/26/12MarkWest Energy Partners Increases Quarterly Cash Distribution
DENVER, Apr 26, 2012 (BUSINESS WIRE) --MarkWest Energy Partners, L.P. (NYSE: MWE) today announced that the Board of Directors of the General Partner of MarkWest Energy Partners, L.P., declared a cash distribution of $0.79 per common unit for the first quarter of 2012, for an implied annual rate of $3.16 per common unit. The first quarter 2012 distribution represents an increase of $0.12 per common unit, or 17.9 percent, compared to the first quarter ... 
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04/24/12MarkWest Energy Partners Announces Release Date for First Quarter 2012 Financial Results
DENVER, Apr 24, 2012 (BUSINESS WIRE) --MarkWest Energy Partners, L.P. (NYSE: MWE) will announce first quarter 2012 financial results after market close on Wednesday, May 9, 2012, and will host a conference call to discuss the results at 4:00 p.m. ET on Thursday, May 10, 2012. The conference call can be accessed by dialing (800) 475-0218 (passcode "MarkWest") or via webcast by accessing the "Investor Relations" page of the MarkWest website at www.markwes... 
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03/19/12MarkWest Announces Significant Producer Agreement to Support East Texas Processing Expansion
DENVER--(BUSINESS WIRE)--Mar. 19, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) today announced the execution of long-term gathering and processing agreements with Anadarko Petroleum Corporation (NYSE: APC) that will support the recently announced 120 million cubic feet per day (MMcf/d) expansion of the Partnership’s cryogenic processing capacity in East Texas. MarkWest will provide gathering and processing services to support Anadarko’s liquids-... 
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03/16/12MarkWest Energy Partners Announces Closing of Public Offering of Common Units
DENVER--(BUSINESS WIRE)--Mar. 16, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today the closing of its previously announced public offering of 6,785,000 common units at $59.54 per common unit, which includes 885,000 common units purchased pursuant to the full exercise of the underwriters’ option to purchase additional common units. MarkWest intends to use the approximately $388.0 million in net proceeds from the offering, after deduct... 
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03/13/12MarkWest Energy Partners Announces Pricing of Public Offering of Common Units
DENVER--(BUSINESS WIRE)--Mar. 13, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today that it priced a public offering of 5,900,000 common units at $59.54 per common unit. MarkWest has granted the underwriters a 30-day option to purchase up to 885,000 additional common units to cover the underwriters’ sale of additional common units, if any. MarkWest intends to use the net proceeds from the offering, after deducting underwriting discoun... 
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03/12/12MarkWest Energy Partners Announces Public Offering of Common Units
DENVER -- (BUSINESS WIRE) -- Mar. 12, 2012 -- MarkWest Energy Partners, L.P. (NYSE: MWE) announced today that it is commencing a public offering of 5,900,000 common units. MarkWest intends to grant the underwriters a 30-day option to purchase a maximum of 885,000 additional common units to cover the underwriters' sale of additional common units, if any. MarkWest intends to use a portion of the net proceeds from the offering and from any exercise of the underwriters' option to partially fund its ... 
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03/06/12MarkWest Utica Announces Letter of Intent to Develop Significant Midstream Infrastructure in the Utica Shale
DENVER--(BUSINESS WIRE)--Mar. 6, 2012-- MarkWest Utica EMG, L.L.C. (MarkWest Utica), a joint venture between MarkWest Energy Partners, L.P. (NYSE: MWE) and The Energy and Minerals Group (EMG) focused on the development of significant natural gas gathering, transportation, and processing and natural gas liquid (NGL) transportation, fractionation, and marketing infrastructure in the Utica shale in eastern Ohio, today announced the execution of a letter... 
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02/28/12MarkWest Energy Partners Reports Record Fourth Quarter and Full Year 2011 Financial Results
DENVER--(BUSINESS WIRE)--Feb. 28, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) (the Partnership) today reported record quarterly cash available for distribution to common unitholders, or distributable cash flow (DCF), of $88.4 million for the three months ended December 31, 2011, and $332.8 million for the year ended December 31, 2011. Distributable cash flow for the three months and year ended December 31, 2011, represents distribution coverage... 
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01/31/12MarkWest Announces Significant Processing and Fractionation Infrastructure for the Marcellus and Utica Shales
DENVER--(BUSINESS WIRE)--Jan. 31, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) today announced expansion plans for the Marcellus and Utica shales that include more than 600 million cubic feet per day (MMcf/d) of additional processing capacity and 140,000 barrels per day (Bbl/d) of incremental fractionation capacity. Once complete, MarkWest will operate approximately 2.3 billion cubic feet per day (Bcf/d) of processing capacity and nearly 300,0... 
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01/26/12MarkWest Energy Partners Increases Quarterly Cash Distribution
DENVER--(BUSINESS WIRE)--Jan. 26, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) today announced that the Board of Directors of the General Partner of MarkWest Energy Partners, L.P., declared a cash distribution of $0.76 per common unit for the fourth quarter of 2011, for an implied annual rate of $3.04 per common unit. The fourth quarter 2011 distribution represents an increase of $0.11 per common unit, or 16.9 percent, compared to the fourth qua... 
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01/12/12MarkWest Energy Partners Announces Release Date for Fourth Quarter and Full Year 2011 Financial Results
DENVER--(BUSINESS WIRE)--Jan. 12, 2012-- MarkWest Energy Partners, L.P. (NYSE: MWE) will announce fourth quarter and full year 2011 financial results after market close on Tuesday, February 28, 2012, and will host a conference call to discuss the results at 4:00 p.m. ET on Wednesday, February 29, 2012. The conference call can be accessed by dialing (800) 475-0218 (passcode “MarkWest”) or via webcast by accessing the “Investor Relations” page ... 
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