William Waldheim

National Propane Gas Association engages in the retail marketing of propane gas and appliances. It produces and wholesales of propane equipment. The firm offers gas cylinders, tanks, and propane transporters. The company was founded in 1931 and is headquartered Nicholasville, KY.

Propane Education & Research Council provides research, safety, and consumer initiatives services. It promotes the safe, efficient use of odorized propane gas as a preferred energy resource through consumer and employee education and technology development and commercialization. The company was founded in 1999 and is headquartered in Washington, DC.

Enbridge Energy Partners LP owns and operates a portfolio of crude oil transportation systems. The company was founded in 1991 and is headquartered in Houston, TX.

Enbridge Energy Management LLC engages in transporting, generating, and distribution of energy and operates crude oil and liquids transportation systems. It operates through the following segments: Liquids, and Natural Gas. The Liquids segment includes the operations of Lakehead, North Dakota, and Mid-Continent systems. The Natural Gas segment is comprised of natural gas, natural gas liquids gathering and transportation pipeline systems, natural gas processing and treating facilities, condensate stabilizers and an natural gas liquids fractionation facility, as well as trucking, rail, and liquids marketing operations. The company was founded on May 14, 2002 and is headquartered in Houston, TX.

Enbridge Energy Co., Inc. provides crude and natural gas transportation business services. The company was founded on October 30, 2001 and is headquartered in Houston, TX.

DCP Midstream Partners LP processes natural gas and natural gas liquids. The company is based in Denver, DE.

Part of Targa Resources Corp., Southcross Energy Partners GP LLC is a private company that provides natural gas transportation services. The company is based in Dallas, TX.

Southcross Energy Partners LLC provided natural gas gathering, processing, treating, compression and transportation services, and natural gas liquids (NGL) fractionation and transportation services. It also sources, purchased, transported, and sold natural gas and NGL's to its power generation, industrial, and utility customers primarily under fixed-spread contracts. The company was founded in 2009 and is headquartered in Houston, TX.