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| Chandeleur Pipe Line Company Provider of business services of transporting natural gas in interstate commerce for the accounts of natural gas shippers. |   |
| Great Lakes Gas Transmission operates a 2100-mile pipeline system that transports Canadian natural gas for delivery to customers in the midwestern and northeastern United States and eastern Canada, as well as storage fields in Michigan. |   | |
| Enron Operates the pipeline companies Northern Natural Gas, Northern Border Pipeline, Transwestern Pipeline, Florida Gas Transmission Company, Houston Pipe Line |   | |
| Paiute Pipeline Company owns and operates a common carrier products pipeline system and three products terminals in Abilene, Texas, San Angelo, Texas, and Aledo, Texas, which are used to market conventional gasoline, low sulfur diesel fuel, and mi. Pride Companies, L.P. |   | |
| PG&E Gas Transmission Northwest owns and operates a common carrier products pipeline system and three products terminals in Abilene, Texas, San Angelo, Texas, and Aledo, Texas, which are used to market conventional gasoline, low sulfur diesel fuel, and mi. Pride Companies, L.P. |   | |
| PG&E Gas Transmission-Northwest Corporation owns and operates a common carrier products pipeline system and three products terminals in Abilene, Texas, San Angelo, Texas, and Aledo, Texas, which are used to market conventional gasoline, low sulfur diesel fuel, and mi. Pride Companies, L.P. |   | |
| Crossroads Pipeline Company Provider of operation services in natural gas transmission, power generation, gas and oil production, merchant energy services, gas gathering and processing and international project development. |   | |
| Niagara Mohawk Energy Marketing, Inc. An unregulated subsidiary of the Niagara Mohawk Power Corporation, providing electric and natural gas energy and services. |   | |
| Williams Energy Natural gas services include exploration, gathering, production and transportation. |   | |
| Questar Pipeline Company Less than three years ago, the company was primarily a regional electric utility with . Reliant Energy is an international energy delivery and energy services company with $15.3 billion in annual revenue and assets totaling more than $26 billion. |   | |
| CMS Panhandle Eastern Pipeline Company CMS Panhandle Eastern Pipe Line Company operates a 6300-mile pipeline system with access to diverse supply sources and can deliver 2.7 Bcf/d of natural gas to Midwest and East Coast markets. |   | |
| Transwestern Pipeline Company Subsidiary of Enron providing approximately 2,700 miles of natural gas pipeline with combined east-west delivery capability of 1.7 Bcf/day. |   | |
| Lone Star Pipeline Company TXU Lone Star Pipeline is the 14th largest natural gas pipeline in the U.S., with over 7,746 miles of gathering and transmission lines in its Texas intrastate system. TXU Lone Star Pipeline is a division of TXU Gas Company, a subsidiary of TXU. |   | |
| MAPSearch Services Provide paper map or digital data on crude oil, finished petroleum products and natural gas pipelines. This comprehensive database provides system information featuring pipeline and facility interconnections. |   | |
| Tuscarora Gas Transmission Company Natural gas gathering, storage and distribution, processing, transportation and distribution, as well as electric power generation. |   | |
| Westcoast Energy Inc. Natural gas gathering, storage and distribution, processing, transportation and distribution, as well as electric power generation. |   | |
| Transcontinental Gas Pipe Line Corporation Subsidiary of Enron providing approximately 2,700 miles of natural gas pipeline with combined east-west delivery capability of 1.7 Bcf/day. |   | |
| Florida Gas Transmission Company Provider of natural gas services for third parties, through dual pipeline systems extending from South Texas to Florida. |   | |
| Colorado Interstate Gas Company Providers of natural gas production, transportation and storage to customers in the Rocky Mountain region. |   | |
| Koch Industries A diversified energy company involved in all aspects of the energy industry: petroleum, mineral services, gas liquids, chemical technology, chemicals and financial services. |   | |
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