UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:
July 3, 2008 4:00 P.M.
Form:
S-4
CIK:
0001166036
Company Name:
MARKWEST ENERGY PARTNERS L P
File Number:
333-151193
CIK:
0001315242
Company Name:
MarkWest Pipeline CO LLC
File Number:
333-151193-25
CIK:
0001315262
Company Name:
MarkWest Energy East Texas Gas CO LLC
File Number:
333-151193-24
CIK:
0001315263
Company Name:
MarkWest Energy Finance CORP
File Number:
333-151193-23
CIK:
0001292417
Company Name:
MarkWest Texas PNG Utility LLC
File Number:
333-151193-22
CIK:
0001292416
Company Name:
MarkWest PNG Utility LLC
File Number:
333-151193-21
CIK:
0001292414
Company Name:
MarkWest Power Tex LLC
File Number:
333-151193-20
CIK:
0001292413
Company Name:
MarkWest Oklahoma Gas CO LLC
File Number:
333-151193-19
CIK:
0001292415
Company Name:
MarkWest Pinnacle LLC
File Number:
333-151193-18
CIK:
0001292411
Company Name:
MarkWest Michigan Pipeline CO LLC
File Number:
333-151193-17
CIK:
0001292409
Company Name:
MarkWest Energy Appalachia LLC
File Number:
333-151193-16
CIK:
0001292408
Company Name:
West Shore Processing CO LLC
File Number:
333-151193-15
CIK:
0001292407
Company Name:
Basin Pipeline LLC
File Number:
333-151193-14
CIK:
0001292419
Company Name:
MarkWest New Mexico LLC
File Number:
333-151193-13
CIK:
0001292406
Company Name:
MarkWest Energy Operating CO LLC
File Number:
333-151193-12
CIK:
0001292418
Company Name:
MarkWest Blackhawk LLC
File Number:
333-151193-11
CIK:
0001349175
Company Name:
MarkWest Javelina CO LLC
File Number:
333-151193-10
CIK:
0001349174
Company Name:
Markwest Javelina Pipeline CO LLC
File Number:
333-151193-09
CIK:
0001019756
Company Name:
MARKWEST HYDROCARBON INC
File Number:
333-151193-08
CIK:
0001435921
Company Name:
Mason Pipeline LTD Liability CO
File Number:
333-151193-07
CIK:
0001435926
Company Name:
Matrex, L.L.C.
File Number:
333-151193-06
CIK:
0001435924
Company Name:
MarkWest Liberty Gas Gathering, L.L.C.
File Number:
333-151193-05
CIK:
0001435923
Company Name:
MarkWest Gas Services, L.L.C.
File Number:
333-151193-04
CIK:
0001435922
Company Name:
MarkWest Marketing, L.L.C.
File Number:
333-151193-03
CIK:
0001412304
Company Name:
MarkWest Energy GP, L.L.C.
File Number:
333-151193-02
CIK:
0001436012
Company Name:
MarkWest Pioneer, L.L.C.
File Number:
333-151193-01