Alliance Pipeline Limited Partnership
Alyeska Pipeline Service Company
ANR Pipeline Company
Atlas Pipeline Partners, L.P. [APL]

Blueknight Energy Partners, L.P. [BKEP]
Boardwalk Pipeline Partners, LP [BWP]
Bridgeline Holdings, L.P.
British Pipeline Agency Ltd.
Buckeye Partners, L.P. [BPL]
Buckeye Pipe Line Company, L.P.

Cheniere Energy Partners, L.P. [CQP]
China Resources Gas Group Limited
Colonial Pipeline Company
Colorado Interstate Gas Company
Columbia Gas Transmission, LLC
Columbia Gulf Transmission Co.
Companhia de Gás de São Paulo
Companhia Logística de Combustíveis, S.A.
Copano Energy, L.L.C.

DCP Midstream Partners, LP [DPM]
Dominion Transmission, Inc.

E.ON Ruhrgas AG
El Paso Pipeline Partners, L.P. [EPB]
Enagás, S.A.
Enbridge Energy Partners, L.P. [EEP]
Enbridge Inc. [ENB]
Energy Transfer Equity, L.P. [ETE]
Energy Transfer Partners, L.P. [ETP]
Enogex LLC
ExxonMobil Pipeline Company

Florida Gas Transmission Company, LLC
Fluxys SA

Gas Transmission Northwest Corporation
Gateway Energy Corporation [GNRG]
Gendis Inc.
Genesis Energy, L.P. [GEL]
Great Lakes Gas Transmission Company
Gulf South Pipeline Company, LP
Gulf United Energy, Inc. [GLFE]
Gulfstream Natural Gas System, L.L.C.

Holly Energy Partners, L.P. [HEP]

Inergy Midstream, L.P. [NRGM]
Inergy, L.P. [NRGY]
Iroquois Gas Transmission System L.P.
Iroquois Pipeline Operating Company

Jayhawk Pipeline, L.L.C.

Kinder Morgan Canada Inc.
Kinder Morgan Energy Partners, L.P. [KMP]
Kinder Morgan Management, LLC [KMR]
Kinder Morgan, Inc. [KMI]

Magellan Midstream Partners, L.P. [MMP]
Martin Midstream Partners L.P. [MMLP]
MPLX LP [MPLX]

N.V. Nederlandse Gasunie
North Baja Pipeline LLC
Northern Natural Gas Company
Northwest Pipeline Corporation
NuStar Energy L.P. [NS]
NuStar GP Holdings, LLC [NSH]

Oiltanking Partners, L.P. [OILT]
Olympic Pipe Line Company
ONEOK Partners, L.P. [OKS]

Panhandle Eastern Pipe Line Company, LP
Panhandle Energy
Pembina Pipeline Corporation
Plains All American Pipeline, L.P. [PAA]
Plantation Pipe Line Company

Questar Pipeline Company

Regency Energy Partners LP

SemGroup Corporation [SEMG]
Shell Pipeline Company, LP
Southern Natural Gas Company
Southern Union Company
Spectra Energy Corp [SE]
Spectra Energy Partners, LP [SEP]
Star Gas Partners, L.P. [SGU]
Sunoco Logistics Partners L.P. [SXL]

Targa Resources Corp. [TRGP]
Targa Resources Partners LP [NGLS]
TC PipeLines, LP
Tesoro Logistics LP [TLLP]
Texas Gas Transmission, LLC
The Williams Companies, Inc. [WMB]
Transcontinental Gas Pipe Line Corporation
TransMontaigne Partners L.P. [TLP]
Transneft
Transportadora Brasileira Gasoduto Bolívia-Brasil S.A.

U.S. Transmission

Vector Pipeline L.P.
Veresen Inc.

Western Gas Partners, LP [WES]
Williams Gas Pipeline Company, LLC
Williston Basin Interstate Pipeline Company
Wolverine Pipe Line Company