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Form S-4/A - Registration of securities, business combinations: [Amend]
SEC Accession No. 0001047469-09-008981
Filing Date
2009-10-16
Accepted
2009-10-16 17:05:53
Documents
5

Document Format Files

Seq Description Document Type Size
1 S-4/A a2194310zs-4a.htm S-4/A 760360
2 EX-12.1 a2194310zex-12_1.htm EX-12.1 21202
3 EX-23.1 a2194310zex-23_1.htm EX-23.1 3008
4 filename4.htm COVER 8422
5 filename5.htm CORRESP 8928
  Complete submission text file 0001047469-09-008981.txt   820298
Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MARKWEST HYDROCARBON INC (Filer) CIK: 0001019756 (see all company filings)

IRS No.: 841352233 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-08 | Film No.: 091124004
SIC: 1311 Crude Petroleum & Natural Gas

Mailing Address 1515 ARAPAHOE STREET TOWER 1, SUITE 1600 DENVER CO 80202
Business Address 1515 ARAPAHOE STREET TOWER 1, SUITE 1600 DENVER CO 80202 303-925-9200
MARKWEST ENERGY PARTNERS L P (Filer) CIK: 0001166036 (see all company filings)

IRS No.: 270005456 | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420 | Film No.: 091123979
SIC: 1311 Crude Petroleum & Natural Gas

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Energy Operating CO LLC (Filer) CIK: 0001292406 (see all company filings)

IRS No.: 270005448 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-13 | Film No.: 091124003

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
Basin Pipeline LLC (Filer) CIK: 0001292407 (see all company filings)

IRS No.: 383297919 | State of Incorp.: MI | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-15 | Film No.: 091124002

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
West Shore Processing CO LLC (Filer) CIK: 0001292408 (see all company filings)

IRS No.: 760501616 | State of Incorp.: MI | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-16 | Film No.: 091124001

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Energy Appalachia LLC (Filer) CIK: 0001292409 (see all company filings)

IRS No.: 470852385 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-17 | Film No.: 091124000

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 70 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 70 DENVER CO 80202-2126 303-925-9200
MarkWest Michigan Pipeline CO LLC (Filer) CIK: 0001292411 (see all company filings)

IRS No.: 830375568 | State of Incorp.: MI | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-18 | Film No.: 091123999

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Oklahoma Gas CO LLC (Filer) CIK: 0001292413 (see all company filings)

IRS No.: 861089780 | State of Incorp.: OK | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-20 | Film No.: 091123998

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Power Tex LLC (Filer) CIK: 0001292414 (see all company filings)

IRS No.: 450537840 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-12 | Film No.: 091123997

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Pinnacle LLC (Filer) CIK: 0001292415 (see all company filings)

IRS No.: 300157461 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-19 | Film No.: 091123996

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202 303-925-9200
MarkWest PNG Utility LLC (Filer) CIK: 0001292416 (see all company filings)

IRS No.: 300157467 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-21 | Film No.: 091123995

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Texas PNG Utility LLC (Filer) CIK: 0001292417 (see all company filings)

IRS No.: 300157468 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-22 | Film No.: 091123994

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Blackhawk LLC (Filer) CIK: 0001292418 (see all company filings)

IRS No.: 300157471 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-11 | Film No.: 091123993

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest New Mexico LLC (Filer) CIK: 0001292419 (see all company filings)

IRS No.: 300157474 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-14 | Film No.: 091123992

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Pipeline CO LLC (Filer) CIK: 0001315242 (see all company filings)

IRS No.: 000000000 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-25 | Film No.: 091123991

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Energy East Texas Gas CO LLC (Filer) CIK: 0001315262 (see all company filings)

IRS No.: 201311706 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-24 | Film No.: 091123990

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Energy Finance CORP (Filer) CIK: 0001315263 (see all company filings)

IRS No.: 201805917 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-23 | Film No.: 091123989

Mailing Address 1515 ARAPAHOE STREET TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9278
Markwest Javelina Pipeline CO LLC (Filer) CIK: 0001349174 (see all company filings)

IRS No.: 382909338 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-09 | Film No.: 091123988

Mailing Address 1515 ARAPAHOE STREET TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest Javelina CO LLC (Filer) CIK: 0001349175 (see all company filings)

IRS No.: 760263770 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-10 | Film No.: 091123987

Mailing Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202
Business Address 1515 ARAPAHOE STREET, TOWER 2, SUITE 700 DENVER CO 80202 303-925-9200
MarkWest Energy GP, L.L.C. (Filer) CIK: 0001412304 (see all company filings)

IRS No.: 010636219
Type: S-4/A | Act: 33 | File No.: 333-160420-01 | Film No.: 091123986

Mailing Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202
Business Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202 3039259200
Mason Pipeline LTD Liability CO (Filer) CIK: 0001435921 (see all company filings)

IRS No.: 000000000 | State of Incorp.: MI | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-07 | Film No.: 091123985

Mailing Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202
Business Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202 3039259200
MarkWest Marketing, L.L.C. (Filer) CIK: 0001435922 (see all company filings)

IRS No.: 262430225 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-03 | Film No.: 091123984

Mailing Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202
Business Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202 3039259200
MarkWest Gas Services, L.L.C. (Filer) CIK: 0001435923 (see all company filings)

IRS No.: 261795927 | State of Incorp.: TX | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-04 | Film No.: 091123983

Mailing Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202
Business Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 HOUSTON TX 80202 3039259200
MarkWest Liberty Gas Gathering, L.L.C. (Filer) CIK: 0001435924 (see all company filings)

IRS No.: 262368254 | State of Incorp.: DE | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-05 | Film No.: 091123982

Mailing Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 DENVER CO 80202
Business Address 1515 ARAPAHOE STREET TOWER II, SUITE 700 DENVER CO 80202 3039259200
Matrex, L.L.C. (Filer) CIK: 0001435926 (see all company filings)

IRS No.: 841349848 | State of Incorp.: MI | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-06 | Film No.: 091123981

Mailing Address 1515 ARAPAHOE STREET TOWER 2, SUITE 700 DENVER CO 80202-2126
Business Address 1515 ARAPAHOE STREET TOWER 2, SUITE 700 DENVER CO 80202-2126 303-925-9200
MarkWest McAlester, L.L.C. (Filer) CIK: 0001457474 (see all company filings)

IRS No.: 263195589 | State of Incorp.: OK | Fiscal Year End: 1231
Type: S-4/A | Act: 33 | File No.: 333-160420-02 | Film No.: 091123980