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.

Southwest Gas Corporation engages in the purchase, distribution, and transportation of natural gas in portions of Arizona, Nevada, and California. As of December 31, 2009, Southwest Gas Corporation purchased and distributed, or transported natural gas to approximately 1,824,000 residential, commercial, and industrial customers. It also operates as an underground piping contractor that provides utility companies with trenching and installation, replacement, and maintenance services for energy distribution systems. Southwest Gas Corporation was founded in 1931 and is headquartered in Las Vegas, Nevada.

Electricity, natural gas, and propane are the right energy mix to keep the customers of Florida Public Utilities happy. Florida Public Utilities Company serves more than 51,530 natural gas, 31,030 electricity, and more than 1,640 propane customers in southern, central, northwestern, and northeastern Florida. Florida Public Utilities buys its natural gas supply directly from marketers and producers and its electricity supply from nearby generating utilities; propane is purchased from wholesale suppliers. In 2009 Chesapeake Utilities acquired the company in a move that made Chesapeake Utilities a national player, and boosted the customer base of the combined companies to 200,000 in the Florida and Mid-Atlantic markets.

Sea Breeze Power, is clean energy. Formerly International Powerhouse Energy, the company is developing large-scale wind farms on the coast of British Columbia in northern Vancouver Island for power generation. It has a number of projects in various stages of development. The company is also developing underwater electricity transmission lines, as well as pursuing other renewable energy opportunities, such as hydro, energy storage, and direct current transmission projects. Key to the company's strategic planning is making the Pacific Northwest's abundant renewable energy sources available to urban areas.

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.

Summit Energy Services is a major provider of energy management and procurement services for industrial and commercial companies, and operates in 56 countries. A consolidator in a fragmented industry, the company's offerings include market intelligence reporting, need and competitive supply analysis, contract negotiation, utility bill auditing, risk advisory planning, and energy efficiency projects. It serves the automotive, healthcare, transportation, and food industries, as well as chemical, metal, paper, and plastic manufacturing companies, and municipal and state governments and hospitality and real estate management enterprises. Summit Energy Services has more than 650 clients.

Wolverine Power Supply Cooperative makes sure that that voracious consumer of electricity -- the American public -- gets the power its needs. The non-profit company is an electric generation and transmission utility that provides services to five member distribution cooperatives in Michigan. Wolverine Power Supply Cooperative monitors and operates 1,600 miles of bulk transmission lines and owns five power plants that generate 200 megawatts of capacity. It also maintains about 130 distribution substations and 36 transmission stations, as well as purchases power (including windpower energy) from other utilities and marketers to distribute to its customers.

Although The Peoples Natural Gas Company brings the power of natural gas to the people of the Keystone state. The company, which operates as Dominion Peoples, serves about 359,000 commercial, industrial, residential, and transportation natural gas customers in 16 counties in southwestern Pennsylvania. By purchasing methane gas in Pennsylvania, the company keeps costs down by eliminating out-of-state transportation expenses. The gas utility was a division of Dominion Delivery, the gas and electric distribution and retail energy marketing unit of Dominion Resources. In 2010 Dominion Resources sold Peoples Natural Gas to a unit of investment firm SteelRiver Infrastructure.

Manitoba Hydro-Electric (commonly called Manitoba Hydro) provides electricity to 532,000 customers in the province of Manitoba. Its power is generated from hydroelectric facilities capable of producing about 32 billion kilowatt-hours of electricity per year. Manitoba Hydro, which is owned by the government of Manitoba, also exports power to utilities and energy marketers in the US and other Canadian provinces. Through its Centra Gas subsidiary, the company distributes natural gas to 264,000 residential, commercial, and industrial customers in 100 communities in Manitoba.

Pennichuck Corporation, through its subsidiaries, engages in the collection, storage, treatment, and distribution of potable water for domestic, industrial, commercial, and fire protection service in New Hampshire and Massachusetts. The company also provides non-regulated water management services, including monitoring, maintenance, testing, and compliance reporting services for water systems of various towns, businesses, and residential communities. In addition, Pennichuck Corporation involves in real estate management and commercialization activities. The company was founded in 1852 and is headquartered in Merrimack, New Hampshire.

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