Ameresco Evansville LLC
Atmos Gathering Company LLC
Aurora Utilities
Bainbridge Utilities
Batesville Water and Gas
Boonville / Chandler Natural Gas Corporation
BP Pipelines
Breitburn Operating LP
Buckeye Partners, LP
Chrisney Municipal Utilities
CITGO Petroleum Corporation
Citizens Gas & Coke Utility
Citizens Gas of Westfield
Community Natural Gas Co. Inc
Country Mark
Crossroads Pipeline Company
Enbridge Energy
Enterprise Products Operating LLC
Explorer Pipeline Company
Fountaintown Gas Company, Inc.
Grandview Municipal Utilities
Granger Energy of Indiana
Heartland Gas Pipeline
Hoosier Energy Rec, Inc
Huntingburg Municipal Utilities
Indiana 811
Indiana Natural Gas Corporation
Indiana Utilities Corporation
Jasonville Utilities
Jasper Municipal Gas & Water
Kinder Morgan,Cochin LLC
Lapel (Town of)
Linton Municipal Utilities
Louisville Gas & Electric Company
Marathon Pipeline LLC
Midwest Natural Gas Corporation
Midwestern Gas Transmission
Montezuma Municipal Gas Utility
Natural Gas Pipeline Company
New Harmony (Town of) Gas Utilities
NIPSCO (Northern Indiana Public Service Company)
Northern Border Pipeline Company
Nustar Pipeline Operating Partnership LP
Ohio Valley Gas Corporation
Oneok North System LLC
Osgood (Town of) Gas Utility
Panhandle Eastern Pipeline Company
Pittsboro (Town of)
Poseyville Municipal Gas Company
Praxair
Rensselaer (City of) Gas Utility
Riverside Petroleum Indiana LLC
Roachdale (Town of) Municipal Utility
South Eastern Indiana Natural Gas Co. Inc.
Spectra Energy
Switzerland County Natural Gas
Sycamore Gas Company
Tallgrass Energy Partners/Rockies Express
Texas Gas Transmission LLC
Toro Energy of Indiana, LLC
TransCanada
Trunkline Gas Company
Valero
Valley Rural Utility Company
Vector Pipeline
CenterPoint Energy
West Shore Pipeline Company
Wolverine Pipe Line Company