Northeast Utilities (NU) uses a little Yankee ingenuity (and a number of power generation plants) to keep its customers powered up. The largest utility in New England, NU supplies power to more than 2 million customers in Connecticut, New Hampshire, and Massachusetts through subsidiaries Connecticut Light and Power, Public Service Company of New Hampshire, and Western Massachusetts Electric. The company's power grid encompasses more than 3,100 circuit miles of overhead transmission lines and more than 32,800 pole miles of distribution lines. NU's Yankee Gas utility provides natural gas to 205,000 customers in Connecticut. In 2010 the company offered to buy regional rival NSTAR in for $4.2 billion.

MMC likes to be m-m-good at what it does. MMC Corporation Berhad concentrates on transport and logistics, energy and utilities, and engineering and construction. Many of its operating companies are the largest or only players in their markets. Its key components are Pelabuhan Tanjung Pelepas (shipping container port), Malakoff (power production), Johor Port (the leading multi-purpose port in Malaysia), and Gas Malaysia (sole non-industrial natural gas supplier in Malaysia). MMC is also involved in flood mitigation, traffic management, and power plant construction projects (through Zelan Construction).

American Transmission Company is an entrepreneur in the US power grid business. Connecting electricity producers to distributors, American Transmission owns, operates, monitors, and maintains 9,400 miles of high-voltage electric transmission lines and 510 substations in portions of Illinois, Michigan, Minnesota, and Wisconsin. American Transmission is one of the first for-profit transmission companies, formed when the US market deregulated in the early 2000s. The company operates the former transmission assets of some of its shareholders. About 30 utilities, municipalities, municipal electric companies, and electric cooperatives in its service area have an ownership stake in American Transmission.

Jackson Energy Authority is a public utility created under a private act passed by the Tennessee Legislature. Our assets and operations are paid for through utility rates, not tax money. A five-member Board of Directors, appointed by Jackson’s Mayor and City Council, governs Jackson Energy Authority.Jackson Energy Authority is one of few public utilities in the United States offering customers all major utility services from one company. We provide reliable electric, gas, propane, water, wastewater, and broadband services. We serve about 40,000 residences, businesses and industry in Jackson, TN and parts of Madison County. We also supply propane to customers not on our natural gas system.

Shell International Renewables (doing business as Shell Renewables) may be able to turn them into fuel to power homes and vehicles. The company oversees many of the parent Royal Dutch Shell's operations in alternative fuels, was formed in 1997 to commercially explore the global possibilities of new low-carbon power systems. Shell Renewables markets and distributes alternative energies from the sun, the wind, hydrogen (technically an energy carrier rather than energy source), and bio-fuels worldwide. It is researching hydrogen created from natural gas and bio-fuels, made of everything from corn to algae, to replace gasoline in cars.

National Fuel Gas Company, through its subsidiaries, operates as a diversified energy company primarily in the United States. The company operates through four segments: Utility, Pipeline and Storage, Exploration and Production, and Energy Marketing. The Utility segment sells natural gas or provides natural gas transportation services to approximately 727,000 customers in Buffalo, Niagara Falls, and Jamestown, New York; and Erie and Sharon, Pennsylvania. The Pipeline and Storage segment provides interstate natural gas transportation and storage services for affiliated and nonaffiliated companies through an integrated gas pipeline system; and 27 underground natural gas storage fields, as well as 4 other underground natural gas storage fields owned and operated jointly with other interstate gas pipeline companies. This segment also transports natural gas for industrial customers and power producers in New York State. It owns the Empire Pipeline, a 157-mile pipeline; and the Empire Connector, which is a 76-mile pipeline extension. The Exploration and Production segment engages in the exploration for, and the development and purchase of natural gas and oil reserves in California, in the Appalachian region of the United States, and in the Gulf Coast region of Texas and Louisiana. As of September 30, 2009, this segment had proved developed and undeveloped reserves of 46,587 thousand barrels of oil and 248,954 million cubic feet equivalent of natural gas. The Energy Marketing segment markets natural gas to industrial, wholesale, commercial, public authority, and residential customers primarily in western and central New York and northwestern Pennsylvania. National Fuel Gas company also develops and operates mid-range independent power production and landfill gas electric generation facilities. National Fuel Gas Company was founded in 1902 and is based in Williamsville, New York.

Toronto Hydro provides electric and related services for the metropolitan area and other parts of Ontario. The company's primary subsidiary, Toronto Hydro-Electric System Limited (LDC), provides regulated power transmission and distribution services to 688,000 residential, commercial, and industrial customers. Subsidiary Toronto Hydro Energy Services markets power and provides energy efficiency products and services throughout Ontario. It also provides street lighting services (160,000 street lights) in the City of Toronto.

Wisconsin Energy Corporation company's utilities provide electricity to more than 1.1 million customers and natural gas to more than 1 million customers in eastern and northern Wisconsin and Michigan's Upper Peninsula. It also serves 465 steam customers in downtown Milwaukee. Wisconsin Energy has about 5,500 MW of generating capacity, primarily from coal-fired and nuclear-powered plants. The company's primary utility subsidiaries, Wisconsin Gas and Wisconsin Electric, operate together as We Energies. Other operations include real estate development and renewable energy technology.

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.

Western Area Power Administration is one of four power marketing agencies of the US Department of Energy, the enterprise operates 57 hydroelectric power plants and one fossil-fueled power generation facility with a combined generating capacity of 10,395 MW. It also manages and maintains more than 17,000 miles of transmission lines. Western Area Power Administration sells wholesale power to investor-owned, government-owned, and cooperative utilities, power marketers, federal agencies, native American tribes and other electricity users in 15 western states over a 1.3-million-sq.-mi. service area.

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