Hercules Offshore, Inc., together with its subsidiaries, provides shallow-water drilling and marine services to the oil and natural gas exploration and production industry in the U.S. Gulf of Mexico and internationally. Hercules Offshore, Inc. serves integrated energy companies, independent oil and natural gas operators, and national oil companies. As of March 31, 2009, the company owned a fleet of 31 jackup rigs, 17 barge rigs, 3 submersible rigs, 1 platform rig, and a fleet of marine support vessels operated through Delta Towing, a wholly owned subsidiary, as well as 60 liftboat vessels and 5 liftboat vessels owned by a third party. In addition, Hercules Offshore, Inc. owns 4 retired jackup rigs and 10 retired inland barges located in the U.S. Gulf of Mexico. Hercules Offshore, Inc. was formerly known as Hercules Offshore, LLC and changed its name to Hercules Offshore, Inc. in November 2005. Hercules Offshore, Inc. was founded in 2004 and is based in Houston, Texas.

ERHC Energy Inc. was founded in 1986 and is based in Houston, Texas. ERHC Energy Inc. engages in the exploration and exploitation of oil and gas reserves in the Gulf of Guinea offshore of central west Africa. ERHC Energy Inc. has rights to working interests in exploration acreage in the Joint Development Zone between the Democratic Republic of Sao Tome and Principe and the Federal Republic of Nigeria, as well as in the territorial waters of Sao Tome. ERHC Energy Inc. also involves in the supply and trade of oil and natural gas.

XTO Energy was founded in 1986 and is headquartered in Fort Worth, Texas. XTO Energy Inc., together with its subsidiaries, engages in the acquisition, development, exploitation, and exploration of producing oil and gas properties in the United States. XTO Energy Inc. also engages in the production, processing, marketing, and transportation of oil and natural gas. The company's properties are concentrated in Texas, Arkansas, Montana, Louisiana, Oklahoma, New Mexico, Utah, Kansas, West Virginia, Colorado, Wyoming, Pennsylvania, and North Dakota. As of December 31, 2008, XTO Energy Inc. had estimated proved reserves of 11.80 trillion cubic feet of natural gas, 76 million barrels of natural gas liquids, and 268 million barrels of oil; and owned interests in 18,235.7 net producing wells. XTO Energy markets its gas to brokers, local distribution companies, and end-users. XTO Energy Inc. was formerly known as Cross Timbers Oil Company and changed its name to XTO Energy Inc. in June 2001.

Shell Canada Limited is one of Canada's largest integrated oil companies. Shell Canada explores for and produces oil and natural gas. Shell Canada Limited also refines oil and markets it as gasoline and other refined products at 2,100 service stations. Shell Canada Limited is a major producer of natural gas liquids, bitumen, and sulfur. Shell Canada owns 60% of Alberta's Athabasca Oil Sands Project, which produces 155,000 barrels of bitumen per day, and explores and produces natural gas in Nova Scotia where it holds 31% of the Sable Offshore Energy Project. Shell Canada Limited is a wholly-owned subsidiary of Royal Dutch Shell.

Heading up petroleum transportation around the Great Lakes is Enbridge Energy Partners, which owns the 1,900-mile US portion of the world's longest liquid petroleum pipeline. When combined with the Canadian segment (owned and operated by Enbridge Inc.), the pipeline system spans some 3,500 miles across North America. Other midstream assets include 5,300 miles of crude oil gathering and transportation lines and 28.9 million barrels of crude oil storage and terminaling capacity, and 11,700 miles of natural gas gathering and transportation pipelines. Enbridge Energy Management owns a 14% stake in the company. In 2008 Enbridge Inc. boosted its overall stake in the partnership to 27%.

Panda Energy has a twenty-five year track record of success in building large-scale, state-of-the-art power generation facilities.Panda Energy International develops, owns, and operates clean, low-cost power plants. The company has built more than 9,000 MW of electric generation capacity in the US. Panda Energy has sold its interests in four gas-fueled power plants in Arkansas, Arizona, and Texas to TECO Energy, and its stakes in projects in China and Nepal. Panda Energy has built the two largest gas-fueled, combined-cycle independent electric generation facilities in the US, totaling 4,500 MW of generating capacity. CEO Bob Carter and his wife, EVP Janice Carter, own a controlling stake in Panda Energy, which they founded in 1982.

APS Energy Services Company, Inc. (APS Energy Services) is the full-service energy services provider and competitive electricity subsidiary of Pinnacle West Capital Corporation (NYSE: PNW), an Arizona-based company with consolidated assets of approximately $11.6 Billion and annual revenues of $3.4 Billion. APS Energy Services was incorporated in the State of Arizona in 1998 and, as part of the Pinnacle West family of companies, energy customers benefit from a cumulative knowledge and experience in energy usage, generation, transmission and distribution. APS Energy Services has engineered, constructed and/or provided guaranteed savings for numerous Arizona-based energy service projects. APS Energy Services is a leading provider of innovative integrated energy efficient and renewable energy solutions in the Southwest. We empower customers by enabling them to meet their business goals while they manage risk, save energy and money, meet sustainability goals and preserve the environment. We seek to promote and implement the efficient use of energy, reduction in carbon footprint and develop comprehensive energy solutions. We are constantly seeking renewable energy alternatives where applicable and conducting work in a sustainable and environmentally responsible manner.

Chesapeake Energy Corporation was founded in 1989 and is based in Oklahoma City, Oklahoma.Chesapeake Energy Corporation, an oil and natural gas exploration and production company, engages in the acquisition, exploration, and development of properties for the production of crude oil and natural gas from underground reservoirs. It also provides marketing and midstream services for natural gas and oil for other working interest owners in properties it operate. Chesapeake Energy Corporation properties are located in Oklahoma, Texas, Alabama, Arkansas, Louisiana, Kansas, Montana, Colorado, North Dakota, Nebraska, New Mexico, West Virginia, Kentucky, Ohio, New York, Maryland, Michigan, Mississippi, Pennsylvania, Tennessee, Utah, Virginia, and Wyoming. As of December 31, 2008, it owned interests in approximately 41,200 producing natural gas and oil wells; and had 12.051 trillion cubic feet equivalent of proved reserves.

TC PipeLines, LP is a United States growth-oriented Master Limited Partnership (MLP). It was formed by TransCanada PipeLines Limited to acquire, own and actively participate in the management of United States based natural gas pipelines and related assets. TC PipeLines, LP owns a 46.45 per cent interest in Great Lakes Gas Transmission Limited Partnership, which owns a 2,115-mile interstate pipeline system that transports gas from Emerson on the Manitoba-Minnesota border to St. Clair on the Michigan-Ontario border. It also owns a 50 per cent interest in Northern Border Pipeline Company, which owns a 1,249-mile interstate pipeline system that transports natural gas from the Montana-Saskatchewan border to markets in the midwestern United States. The third investment is a 100 per cent interest in Tuscarora Gas Transmission Company, which owns a 240-mile interstate pipeline system that transports natural gas from Oregon, where it interconnects with TransCanada's Gas Transmission Northwest System, to northern Nevada. The fourth investment is a 100 per cent interest in North Baja Pipeline, LLC, which owns an 80-mile pipeline system that transports natural gas from Southwestern Arizona to a point on the California/Mexico border and connects with a natural gas pipeline system in Mexico. Our general partner is TC PipeLines GP, Inc., an indirect wholly-owned subsidiary of TransCanada Corporation. TransCanada is a leader in the responsible development and reliable operation of North American energy infrastructure including natural gas pipelines, power generation, gas storage facilities, and projects related to oil pipelines. TransCanada's network of wholly owned pipelines extends more than 36,500 miles, tapping into virtually all major gas supply basins in North America. TransCanada is one of the continent's largest providers of gas storage and related services with approximately 370 billion cubic feet of storage capacity. A growing independent power producer, TransCanada owns, or has interests in, over 10,900 megawatts of power generation in Canada and the United States. TransCanada's common shares trade on the Toronto and New York stock exchanges under the symbol TRP. TransCanada is the operator of all four of our pipeline systems.

True Energy Trust is generating oil and gas profits from its assets Western Canada. True Energy Trust has interests in oil and gas exploration and production properties (about 375,000 net undeveloped acres) in Alberta, British Columbia, and Saskatchewan. In 2008 True Energy reported proved and probable reserves of 39.3 million barrels of oil equivalent (of which natural gas accounted for 55%, heavy oil, 34%, and light oil and natural gas liquids, 11%). That year True Energy Trust also reported production of about 11,900 barrels of oil equivalent per day.

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