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Alliance Pipeline View Letter May 2008
AltaGas Ltd. View Letter Aug 2011
Atlas Pipeline View Letter Jan 2011
Belle Fourche/Bridger Pipeline View Letter Jul 2008
BP Pipelines & Logistics View Letter Mar 2002
Buckeye Partners, LP View Letter Mar 2002
Caiman Energy, LLC View Letter Mar 2011
Chevron Pipe Line Company View Letter Sep 2004
Colonial Pipeline Company View Letter Jan 2002
ConocoPhillips Transportation View Letter May 2002
Copano Energy View Letter Dec 2011
DCP Midstream View Letter
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Mar 2011
Dow Pipeline View Letter Aug 2003
Eagle Rock Energy Partners View Letter Jun 2011
El Paso Pipelines View Letter Feb 2009
Enbridge Gas Transportation View Letter Oct 2006
Enbridge Pipelines Inc. View Letter Apr 2002
Energy Transfer Company View Letter Aug 2007
Enterprise Products View Letter Jan 2002
Explorer Pipeline View Letter Nov 2001
ExxonMobil Pipeline Company View Letter Apr 2002
Holly Energy Partners View Letter Aug 2007
Keyera Energy View Letter Oct 2008
Kinder Morgan View Letter Jan 2002
Koch Pipeline Company, L.P. - Corporate View Letter Mar 2001
LDH Energy View Letter Aug 2004
LOOP (Louisiana Offshore Oil Port), LLC View Letter Jun 2003
NCRA/Jayhawk Pipeline View Letter Nov 2006
NuStar Energy L.P. View Letter
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Jun 2002
NuStar Terminals Limited View Letter
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Jun 2010
ONEOK Distribution View Letter Jan 2010
ONEOK NGL Pipeline View Letter Sep 2004
ONEOK Services Company View Letter Mar 2006
Pembina Pipeline Corporation View Letter May 2011
PEMEX View Letter Oct 2009
Plains All American Pipeline View Letter Mar 2002
Plains Midstream Canada ULC View Letter Aug 2008
PVR Midstream View Letter Jun 2011
SemGroup Corp View Letter Aug 2011
Shell Pipeline Co. LP View Letter Jan 2002
Southern Union Company View Letter Oct 2008
Spectra Energy View Letter Dec 2008
Sunoco Logistics Partners, LP View Letter Jan 2003
Targa Resources View Letter Feb 2008
TransCanada View Letter Feb 2008
Williams Midstream View Letter Feb 2003
Wolverine Pipe Line Company View Letter Jun 2003
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Apache Canada Ltd View Letter Apr 2006
BHP Billiton Petroleum - Petrohawk View Letter Sep 2011
BP Canada View Letter
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Mar 2010
BP Exploration & Production (United States) View Letter Sep 2007
Cabot Oil & Gas View Letter May 2011
Cenovus Energy Inc View Letter Jul 2008
Chaparral Energy View Letter Sep 2010
Chesapeake Energy View Letter Oct 2009
Chevron AMBU View Letter Jan 2011
Chevron Australia Pty. Ltd. View Letter Dec 2008
Chevron Canada Resources View Letter May 2006
Chevron Mid-Continent Business Unit View Letter Sep 2004
Chinook Energy Inc. View Letter Mar 2011
Cimarex Energy View Letter Jun 2011
Connacher Oil & Gas Limited View Letter Apr 2008
ConocoPhillips Alaska View Letter Sep 2007
ConocoPhillips Canada View Letter Dec 2006
ConocoPhillips Company (Lower 48) View Letter Mar 2004
ConocoPhillips Services View Letter Dec 2008
Denbury Resources Inc. View Letter Feb 2002
Devon Canada Corporation View Letter May 2007
Devon Energy Corporation View Letter Feb 2004
Direct Energy View Letter Sep 2011
Dover Operating Corp. View Letter Aug 2011
EF Energy View Letter May 2011
El Paso E&P Company, L.P. View Letter Dec 2005
Encana Corporation [Canadian Division] View Letter Jul 2008
Enerplus View Letter Jan 2011
Eni Petroleum View Letter Dec 2010
EOG Resources Canada, Inc. View Letter Feb 2007
EXCO Resources View Letter Sep 2009
Hess Exploration and Production View Letter
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May 2011
Husky Energy View Letter Nov 2006
JX Nippon Oil Exploration U.S.A. Limited View Letter Sep 2007
KM LNG Operating General Partnership View Letter Nov 2010
Koch Mineral Services LLC View Letter Mar 2006
Marathon Oil Corporation View Letter
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Sep 2010
McMoRan Oil & Gas View Letter Jan 2006
Murphy Exploration and Production Company View Letter Oct 2009
Nexen Inc. [Canadian Division] View Letter Jun 2006
Noble Energy View Letter Dec 2005
Northern Blizzard Resources Inc. View Letter Aug 2010
Osum Oil Sands Corp View Letter Aug 2009
OXY USA Inc. View Letter Sep 2004
Penn West Petroleum Ltd. View Letter Aug 2009
Pennsylvania General Energy View Letter Nov 2011
Plains Exploration and Production Company View Letter Aug 2003
Quantum Resources Management, LLC View Letter Oct 2011
Range Resources View Letter Sep 2009
Repsol Services Company and Affiliates View Letter Dec 2006
REX Energy View Letter Jun 2010
Samson Resources View Letter Nov 2011
SandRidge Energy View Letter Oct 2011
Seneca Resources Corporation View Letter Mar 2011
Shell Distribution and Downstream View Letter Aug 2008
Shell Upstream Americas View Letter Oct 2004
SM Energy Company View Letter Apr 2008
Southern Pacific Resource Corp View Letter May 2011
Southwestern Energy Company View Letter Apr 2010
Statoil View Letter Feb 2007
Talisman Energy Inc View Letter Jan 2010
Talisman Energy USA Inc. View Letter Apr 2010
T-C Oil Company, LLC View Letter Jul 2010
The Rumaila Operating Organisation (ROO) View Letter
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May 2011
The Shell Company of Australia Limited View Letter Apr 2010
Ultra Resources View Letter May 2010
W&T Offshore View Letter Apr 2007
XTO Energy View Letter Feb 2006
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