-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, KhMBzWFgrVyQemgov64xIbBH0UNP/OcFfGWMW1yS3JGn49NJOhWspEiXzB2bY/jq 9cT7RR9aibtZKWc1byZ3KA== 0001104659-09-059263.txt : 20101213 0001104659-09-059263.hdr.sgml : 20101213 20091016171258 ACCESSION NUMBER: 0001104659-09-059263 CONFORMED SUBMISSION TYPE: CORRESP PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20091016 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MARKWEST HYDROCARBON INC CENTRAL INDEX KEY: 0001019756 STANDARD INDUSTRIAL CLASSIFICATION: CRUDE PETROLEUM & NATURAL GAS [1311] IRS NUMBER: 841352233 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MARKWEST ENERGY PARTNERS L P CENTRAL INDEX KEY: 0001166036 STANDARD INDUSTRIAL CLASSIFICATION: CRUDE PETROLEUM & NATURAL GAS [1311] IRS NUMBER: 270005456 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 1, SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 1, SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Energy Operating CO LLC CENTRAL INDEX KEY: 0001292406 IRS NUMBER: 270005448 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Basin Pipeline LLC CENTRAL INDEX KEY: 0001292407 IRS NUMBER: 383297919 STATE OF INCORPORATION: MI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: West Shore Processing CO LLC CENTRAL INDEX KEY: 0001292408 IRS NUMBER: 760501616 STATE OF INCORPORATION: MI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Energy Appalachia LLC CENTRAL INDEX KEY: 0001292409 IRS NUMBER: 470852385 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Michigan Pipeline CO LLC CENTRAL INDEX KEY: 0001292411 IRS NUMBER: 830375568 STATE OF INCORPORATION: MI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 70 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 70 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Oklahoma Gas CO LLC CENTRAL INDEX KEY: 0001292413 IRS NUMBER: 861089780 STATE OF INCORPORATION: OK FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Western Oklahoma Gas CO LLC DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Power Tex LLC CENTRAL INDEX KEY: 0001292414 IRS NUMBER: 450537840 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Power Tex LP DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Pinnacle LLC CENTRAL INDEX KEY: 0001292415 IRS NUMBER: 300157461 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Pinnacle LP DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest PNG Utility LLC CENTRAL INDEX KEY: 0001292416 IRS NUMBER: 300157467 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest PNG Utility LP DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Texas PNG Utility LLC CENTRAL INDEX KEY: 0001292417 IRS NUMBER: 300157468 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Texas PNG Utility LP DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Blackhawk LLC CENTRAL INDEX KEY: 0001292418 IRS NUMBER: 300157471 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Blackhawk LP DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest New Mexico LLC CENTRAL INDEX KEY: 0001292419 IRS NUMBER: 300157474 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest New Mexico LP DATE OF NAME CHANGE: 20040602 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Pipeline CO LLC CENTRAL INDEX KEY: 0001315242 IRS NUMBER: 000000000 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Pipeline CO LP DATE OF NAME CHANGE: 20050124 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Energy East Texas Gas CO LLC CENTRAL INDEX KEY: 0001315262 IRS NUMBER: 201311706 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Energy East Texas Gas CO LP DATE OF NAME CHANGE: 20050124 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Energy Finance CORP CENTRAL INDEX KEY: 0001315263 IRS NUMBER: 201805917 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Markwest Javelina Pipeline CO LLC CENTRAL INDEX KEY: 0001349174 IRS NUMBER: 382909338 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9278 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: Markwest Javelina Pipeline CO DATE OF NAME CHANGE: 20060109 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Javelina CO LLC CENTRAL INDEX KEY: 0001349175 IRS NUMBER: 760263770 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 FORMER COMPANY: FORMER CONFORMED NAME: MarkWest Javelina CO DATE OF NAME CHANGE: 20060109 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Energy GP, L.L.C. CENTRAL INDEX KEY: 0001412304 IRS NUMBER: 010636219 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Mason Pipeline LTD Liability CO CENTRAL INDEX KEY: 0001435921 IRS NUMBER: 000000000 STATE OF INCORPORATION: MI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 BUSINESS PHONE: 3039259200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Marketing, L.L.C. CENTRAL INDEX KEY: 0001435922 IRS NUMBER: 262430225 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 BUSINESS PHONE: 3039259200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Gas Services, L.L.C. CENTRAL INDEX KEY: 0001435923 IRS NUMBER: 261795927 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 BUSINESS PHONE: 3039259200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Liberty Gas Gathering, L.L.C. CENTRAL INDEX KEY: 0001435924 IRS NUMBER: 262368254 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 BUSINESS PHONE: 3039259200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: HOUSTON STATE: TX ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Matrex, L.L.C. CENTRAL INDEX KEY: 0001435926 IRS NUMBER: 841349848 STATE OF INCORPORATION: MI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: 3039259200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER II, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest McAlester, L.L.C. CENTRAL INDEX KEY: 0001457474 IRS NUMBER: 263195589 STATE OF INCORPORATION: OK FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202-2126 CORRESP 1 filename1.htm

[MarkWest Energy Partners, L.P. Letterhead]

October 16, 2009

Via FACSIMILE and EDGAR

United States Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E., Mail Stop 7010

Washington, D.C. 20549-0405

Fax: (202) 772-9220

Attn: Mr. H. Roger Schwall

Re: Registration Statement on Form S-4

Filed July 2, 2009

File No. 333-160420

Ladies and Gentlemen:

Pursuant to Rule 461 under the Securities Act of 1933, as amended, we hereby request that the effectiveness of the above-referenced Registration Statement (as amended, the “Registration Statement”) be accelerated so that such Registration Statement will become effective at 5:00 p.m. (Eastern Daylight Time) on October 19, 2009 or as soon thereafter as practicable.

In addition, we acknowledge the following:

· should the Securities and Exchange Commission (the “Commission”) or the staff, acting pursuant to delegated authority, declare the filing effective, it does not foreclose the Commission from taking any action with respect to the filing;

· the action of the Commission or the staff, acting pursuant to delegated authority, in declaring the filing effective, does not relieve us from our full responsibility for the adequacy and accuracy of the disclosure in the filing; and

· we may not assert staff comments and the declaration of effectiveness as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of the United States.

	Very truly yours,

	MarkWest Energy Partners, L.P.

	By:	MarkWest Energy GP, L.L.C.,
		its General Partner


	By:	/s/ C. Corwin Bromley
		C. Corwin Bromley
		Senior Vice President, General
		Counsel and Secretary

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