NorthWestern, once a holding company for several energy-related businesses, is now blowing in one direction only -- providing power and gas through regulated utilites. Through its NorthWestern Energy subsidiary, the company provides electricity and natural gas to about 661,000 customers in Montana, Nebraska, and South Dakota. In Montana it delivers electricity to approximately 335,000 customers in 187 communities and surrounding rural areas, 15 rural electric cooperatives, and in Wyoming to the Yellowstone National Park. NorthWestern delivers gas to 180,100 Montana customers. In Nebraska and South Dakota it sells natural gas to 85,5100 customers.

PPL packs a powerful punch in Pennsylvania, Kentucky and the UK, where it distributes electricity to 5.2 million customers through regulated subsidiaries PPL Electric Utilities (1.4 million customers), two utilities in Kentucky (1.2 million), and Western Power Distribution Holdings (2.6 million electricity customers). The company has 19,000 MW of generating capacity and also sells energy wholesale in key US markets. Once a global power player with interests in distribution companies worldwide, the company has opted for the UK as its non-US focus. Western Power Distribution operates two of the 15 distribution networks providing electricity service in the UK -- WPD (South West) and WPD (South Wales).

Detroit Edison generates and distributes electricity to 2.1 million customers in Michigan. The utility, a unit of regional power player DTE Energy, has more than 11,080 MW of generating capacity from its interests in nfossil-fueled, nuclear, and hydroelectric power plants. It operates more than 44,000 circuit miles of distribution lines and owns and operates about 680 distribution substations. Detroit Edison also sells excess power to wholesale customers and provides coal transportation services.

Dominion Resources, Inc., together with its subsidiaries, engages in producing and transporting energy in the United States. It operates in three segments: DVP, Dominion Generation, and Dominion Energy. The DVP segment includes regulated electric transmission and distribution operations that serve residential, commercial, industrial, and governmental customers in Virginia and northeastern North Carolina. This segment also involves in non regulated retail energy marketing of electricity and natural gas. The Dominion Generation segment includes the electricity generation through coal, nuclear, gas, oil, and renewables; and related energy supply operations. It also comprises generation operations of the company’s merchant fleet and energy marketing, and price risk management activities for these assets. The Dominion Energy segment includes the company’s Ohio and West Virginia regulated natural gas distribution companies, regulated gas transmission pipeline and storage operations, natural gas gathering and by-products extraction activities, regulated LNG import and storage, and Appalachian exploration and production operations. It also provides producer services, which aggregates natural gas supply; engages in natural gas trading and marketing activities; and involves in natural gas supply management. The company’s portfolio of assets includes approximately 27,500 MW of generation; 6,000 miles of electric transmission lines; 56,000 miles of electric distribution lines; 12,000 miles of natural gas transmission, gathering, and storage pipeline; and 21,700 miles of gas distribution pipeline. Dominion Resources, Inc. also owns approximately 942 bcf of storage capacity of natural gas and serves retail energy customers in 12 states. In addition, it sells electricity at wholesale prices to rural electric cooperatives, municipalities, and into wholesale electricity markets. The company was founded in 1909 and is headquartered in Richmond, Virginia.

The lights are big and bright deep in the heart of the Lone Star State thanks to AEP Texas Central (TCC). The utility, formerly named Central Power and Light, provides regulated electric utility services to 766.000 customers in its 100,000 sq. ml. service territory in south and west Texas. TCC operates more than 29,600 miles of transmission and distribution lines in Texas; its transmission assets are managed by ERCOT. In addition to distributing power, AEP Texas also reads electric meters. maintains and repairs power lines, and takes care of connections and disconnections.

Siemens Water Technologies Corp. company is a leading producer of water- and wastewater-treatment equipment worldwide. Through its Water and Wastewater Systems and Water Services and Products groups, Siemens Water Technologies provides services to municipal, industrial, and institutional clients. It has more than 200,000 installations on several continents and a portfolio of more than 900 water treatment products and technologies. Among its other services are ion exchange resin recycling and thermal reactivation processes that reduce carbon expenditure. The company is a subsidiary of Siemens Industry.

Wahlco likes to keep it clean. It designs and manufactures air pollution control equipment, specializing in ammonia handling, flue gas conditioning, nitrogen oxide control equipment which it installs at power plants and other industrial facilities, including cement plants, oil and gas refineries, pulp and paper mills, and steel mills. Wahlco also makes products such as low-watt density heaters and specialty thermocouples for industrial applications. The company's systems and equipment can be found in more than 500 locations in more than 17 countries. Wahlco was founded by a small group of experts in 1972.

National Power Corporation (Napocor) provides power for the nation of the Philippines. The state-owned utility builds and operates nuclear, hydroelectric, thermal, and alternative power-generating facilities and works with independent producers under a build-operate-transfer program. Its transmission network has a line length of nearly 13,000 circuit miles. With energy sales of more than 39,350 GWh per year, Napocor distributes electricity to power distributors and industrial companies. To comply with a sweeping privatization bill, the company has begun selling off its generation assets. It has also separated its transmission segment into an operating subsidiary.

Compressco Partners puts the pressure on before the natural gas and oil wells run dry. The company specializes in providing services to more than 400 natural gas and oil companies across 14 states to increase production and total recoverable reserves. The company offers compression, liquids separation, and gas metering services, as well as the GasJack units that perform these operations. It applies its services primarily to mature wells, but also on newer wells, which have declined in production. Compressco Partners, a subsidiary of TETRA Technologies, also provides well evaluations and well testing and monitoring services in Mexico.

Sutton and East Surrey Water supplies water in southern England. The regulated utility distributes water to about 252,000 residential customers and some 18,000 businesses, (a population about 650,000 people), in the London boroughs of Croydon, Merton, and Sutton, as well as East Surrey and parts of Kent and Sussex. Formerly a subsidiary of East Surrey Holdings, the company was acquired by private equity firm Terra Firma Capital Partners in 2005 when Terra Firma was required to buy the parent company in order to obtain gas company Phoenix Natural Gas. Terra Firma quickly sold the water utility to a fund of Germany's Deutsche Bank.

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