Markwest New Mexico, L. L. C.

Second Revised Volume No. 1

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Effective Date: 08/01/2008, Docket: RP08-409-000, Status: Effective

Original Sheet No. 0 MarkWest New Mexico L.L.C.: Second Revised Volume No. 1

Original Sheet No. 0

FERC GAS TARIFF

SECOND REVISED VOLUME NO. 1

OF

MARKWEST NEW MEXICO, L.L.C.

FILED WITH THE

FEDERAL ENERGY REGULATORY COMMISSION

Communications Concerning This Tariff

Should Be Addressed To:

John C. Mollenkopf

Senior Vice President, Southwest Business Unit

MarkWest Energy Partners, L.P.

Telephone: (303) 925-9246

Facsimile: (303) 290-8769

MARKWEST NEW MEXICO, L.L.C.

1515 Arapahoe Street

Tower 2, Suite 700

Denver, CO 80202-2126