9999999995-12-003145.txt : 20121105 9999999995-12-003145.hdr.sgml : 20121105 20121105001517 ACCESSION NUMBER: 9999999995-12-003145 CONFORMED SUBMISSION TYPE: EFFECT PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20121102 DATE AS OF CHANGE: 20121105 EFFECTIVENESS DATE: 20121102 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-02 FILM NUMBER: 121178411 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482 FILM NUMBER: 121178409 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-27 FILM NUMBER: 121178441 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-26 FILM NUMBER: 121178440 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-25 FILM NUMBER: 121178439 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-23 FILM NUMBER: 121178437 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-22 FILM NUMBER: 121178435 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-16 FILM NUMBER: 121178431 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-20 FILM NUMBER: 121178433 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-19 FILM NUMBER: 121178432 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-18 FILM NUMBER: 121178416 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-17 FILM NUMBER: 121178415 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-21 FILM NUMBER: 121178434 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-15 FILM NUMBER: 121178430 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-14 FILM NUMBER: 121178429 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 STANDARD INDUSTRIAL CLASSIFICATION: CRUDE PETROLEUM & NATURAL GAS [1311] IRS NUMBER: 201805917 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-28 FILM NUMBER: 121178442 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-12 FILM NUMBER: 121178427 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-13 FILM NUMBER: 121178428 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-03 FILM NUMBER: 121178422 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-24 FILM NUMBER: 121178438 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-01 FILM NUMBER: 121178412 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-04 FILM NUMBER: 121178418 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-10 FILM NUMBER: 121178425 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-11 FILM NUMBER: 121178426 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 Gas Marketing, L.L.C. CENTRAL INDEX KEY: 0001457473 IRS NUMBER: 262827902 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-09 FILM NUMBER: 121178424 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 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: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-08 FILM NUMBER: 121178423 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 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Ranger Pipeline Company, L.L.C. CENTRAL INDEX KEY: 0001512400 IRS NUMBER: 274613260 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-07 FILM NUMBER: 121178421 BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 1, SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202-2137 BUSINESS PHONE: (303) 925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 1, SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202-2137 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Mountaineer Pipeline Company, L.L.C. CENTRAL INDEX KEY: 0001533090 IRS NUMBER: 453160452 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-06 FILM NUMBER: 121178420 BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER I, STE. 1600 CITY: DENVER STATE: CO ZIP: 80202-2137 BUSINESS PHONE: (303) 925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER I, STE. 1600 CITY: DENVER STATE: CO ZIP: 80202-2137 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MarkWest Utica Operating Company, L.L.C. CENTRAL INDEX KEY: 0001555528 IRS NUMBER: 800773356 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: EFFECT SEC ACT: 1933 Act SEC FILE NUMBER: 333-184482-05 FILM NUMBER: 121178419 BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 1 STREET 2: SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: (303) 925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET, TOWER 1 STREET 2: SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202 EFFECT 1 primary_doc.xml X0101 EFFECT 33 LIVE 2012-11-02 12:00:00

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0001166036 MARKWEST ENERGY PARTNERS L P 333-184482 0001315263 MarkWest Energy Finance CORP 333-184482-28 0001292406 MarkWest Energy Operating CO LLC 333-184482-27 0001292408 West Shore Processing CO LLC 333-184482-26 0001292409 MarkWest Energy Appalachia LLC 333-184482-25 0001435921 Mason Pipeline LTD Liability CO 333-184482-24 0001292411 MarkWest Michigan Pipeline CO LLC 333-184482-23 0001292413 MarkWest Oklahoma Gas CO LLC 333-184482-22 0001292419 MarkWest New Mexico LLC 333-184482-21 0001292415 MarkWest Pinnacle LLC 333-184482-20 0001292416 MarkWest PNG Utility LLC 333-184482-19 0001292417 MarkWest Texas PNG Utility LLC 333-184482-18 0001292418 MarkWest Blackhawk LLC 333-184482-17 0001292414 MarkWest Power Tex LLC 333-184482-16 0001315242 MarkWest Pipeline CO LLC 333-184482-15 0001315262 MarkWest Energy East Texas Gas CO LLC 333-184482-14 0001349175 MarkWest Javelina CO LLC 333-184482-13 0001349174 Markwest Javelina Pipeline CO LLC 333-184482-12 0001435926 Matrex, L.L.C. 333-184482-11 0001435924 MarkWest Liberty Gas Gathering, L.L.C. 333-184482-10 0001457473 MarkWest Gas Marketing, L.L.C. 333-184482-09 0001457474 MarkWest McAlester, L.L.C. 333-184482-08 0001512400 MarkWest Ranger Pipeline Company, L.L.C. 333-184482-07 0001533090 MarkWest Mountaineer Pipeline Company, L.L.C. 333-184482-06 0001555528 MarkWest Utica Operating Company, L.L.C. 333-184482-05 0001435923 MarkWest Gas Services, L.L.C. 333-184482-04 0001412304 MarkWest Energy GP, L.L.C. 333-184482-03 0001019756 MARKWEST HYDROCARBON INC 333-184482-02 0001435922 MarkWest Marketing, L.L.C. 333-184482-01