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Filing Detail
Form 424B2 - Prospectus [Rule 424(b)(2)]:
SEC Accession No. 0001047469-11-001651
Filing Date
2011-03-02
Accepted
2011-03-02 08:07:26
Documents
6

Document Format Files

Seq Description Document Type Size
1 424B2 a2202160z424b2.htm 424B2 947727
2 G655799.JPG g655799.jpg GRAPHIC 14649
3 G530758.JPG g530758.jpg GRAPHIC 235347
4 G199847.JPG g199847.jpg GRAPHIC 32767
5 G675283.JPG g675283.jpg GRAPHIC 48849
6 G506681.JPG g506681.jpg GRAPHIC 28632
  Complete submission text file 0001047469-11-001651.txt   1463041
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: 424B2 | Act: 33 | File No.: 333-164323-25 | Film No.: 11654471
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: 424B2 | Act: 33 | File No.: 333-164323 | Film No.: 11654449
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: 424B2 | Act: 33 | File No.: 333-164323-24 | Film No.: 11654470

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: 424B2 | Act: 33 | File No.: 333-164323-23 | Film No.: 11654469

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: 424B2 | Act: 33 | File No.: 333-164323-22 | Film No.: 11654468

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: 424B2 | Act: 33 | File No.: 333-164323-21 | Film No.: 11654467

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: 424B2 | Act: 33 | File No.: 333-164323-20 | Film No.: 11654466

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: 424B2 | Act: 33 | File No.: 333-164323-19 | Film No.: 11654465

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: 424B2 | Act: 33 | File No.: 333-164323-18 | Film No.: 11654464

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: 424B2 | Act: 33 | File No.: 333-164323-17 | Film No.: 11654463

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: 424B2 | Act: 33 | File No.: 333-164323-16 | Film No.: 11654462

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: 424B2 | Act: 33 | File No.: 333-164323-15 | Film No.: 11654461

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: 424B2 | Act: 33 | File No.: 333-164323-14 | Film No.: 11654460

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: 424B2 | Act: 33 | File No.: 333-164323-13 | Film No.: 11654459

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: 424B2 | Act: 33 | File No.: 333-164323-12 | Film No.: 11654458

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: 424B2 | Act: 33 | File No.: 333-164323-01 | Film No.: 11654447
SIC: 6189 Asset-Backed Securities

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: 424B2 | Act: 33 | File No.: 333-164323-11 | Film No.: 11654457

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: 424B2 | Act: 33 | File No.: 333-164323-10 | Film No.: 11654456

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: 424B2 | Act: 33 | File No.: 333-164323-09 | Film No.: 11654455

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: 424B2 | Act: 33 | File No.: 333-164323-08 | Film No.: 11654472

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: 424B2 | Act: 33 | File No.: 333-164323-07 | Film No.: 11654453

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: 424B2 | Act: 33 | File No.: 333-164323-05 | Film No.: 11654452

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: 424B2 | Act: 33 | File No.: 333-164323-04 | Film No.: 11654451

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: 424B2 | Act: 33 | File No.: 333-164323-03 | Film No.: 11654450

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 Gas Marketing, L.L.C. (Filer) CIK: 0001457473 (see all company filings)

IRS No.: 262827902 | State of Incorp.: TX | Fiscal Year End: 1231
Type: 424B2 | Act: 33 | File No.: 333-164323-06 | Film No.: 11654448

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: 424B2 | Act: 33 | File No.: 333-164323-02 | Film No.: 11654454

Mailing Address 1515 ARAPAHOE STREET TOWER 1, SUITE 1600 DENVER CO 80202-2137
Business Address 1515 ARAPAHOE STREET TOWER 1, SUITE 1600 DENVER CO 80202-2137 (303) 925-9200
MarkWest Ranger Pipeline Company, L.L.C. (Filer) CIK: 0001512400 (see all company filings)

IRS No.: 274613260 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 424B2 | Act: 33 | File No.: 333-164323-26 | Film No.: 11654446