Duke Energy Indiana (formerly PSI Energy) brings a spark to the Hoosier state. One of Indiana's largest utilities, Duke Energy subsidiary Duke Energy Indiana transmits and distributes electricity to 69 of the state's 92 counties (approximately 780,000 customers). The utility also owns power plants (more than 6,730 MW of primarily fossil-fueled capacity), which are operated by its parent's merchant energy division. Duke Energy Indiana's service area covers about 22,000 sq. miles with an estimated population of 2.4 million. The company operates about 31,000 miles of distribution lines and a 5,400-mile transmission system. In 2010 Duke Energy Indiana appointed company veteran Doug Esamann as president.

The rural distribution cooperative operates nearly 5,300 miles of transmission and distribution lines. Adams-Columbia Electric was formed through the merger of Adams-Marquette Electric Cooperative and Columbus Rural Electric Cooperative in 1987. The utility expanded further through its 1992 acquisition of Waushara Electric Cooperative. The cooperative covers a 2,500 sq. ml. geographic service area.With a name that harkens back to Christopher Columbus and the Founding Fathers, Adams-Columbia Electric Cooperative provides power to more than 36,000 member-owners in 12 counties in central Wisconsin.

Severn Trent Services is intent on providing cleaner water for consumers around the globe. The company, a subsidiary of UK-based Severn Trent, provides water and wastewater purification services and products to utilities, bottling companies, and other clients, primarily in the US and the UK. Operations include water filtration and disinfection technologies, contract operations and maintenance, pipeline rehabilitation, and state-of-the-art residential metering products and services. Severn Trent Services' international management services unit supports all aspects of water and wastewater utility management.

Pepco Holdings has more power than any politician in the populace of the US capital. The holding company distributes electricity and natural gas through its Potomac Electric Power (Pepco), Delmarva Power & Light, and Atlantic City Electric utilities to about 1.9 million customers in Delaware, Maryland, New Jersey, and Washington, DC. Nonregulated operations include independent power production, wholesale and retail energy marketing, and energy management services, through the company's Pepco Energy Services units.

AMEC Geomatrix Consultants hopes to be chosen to provide engineering, environmental, and geological consulting services. Its environmental-related services include support for air quality compliance, licensing and regulatory assistance, site assessment, and remediation. The firm also provides assessments of seismic activity and earthquake-related engineering services, cartography and other geographic information systems (GIS) design, decision analysis consulting, and natural resources optimization. AMEC Geomatrix, a unit of AMEC Earth & Environmental, conducts projects worldwide and has 19 offices located throughout the US, and one in Canada.

Volunteer Energy Cooperative is voluntarily cooperating with its members to serve their energy needs. The distribution utility serves more than 108,000 customers (who also own the cooperative) in 17 central and eastern Tennessee counties. It operates more than 8,400 miles of power lines. Volunteer Energy purchases its power supply from the Tennessee Valley Authority. The company also sells propane and provides telecommunications (Internet access and long-distance phone) services. In addition, Volunteer Energy offers its customer surge protection and security equipment.

Clean Energy Fuels Corp., together with its subsidiaries, provides natural gas as an alternative fuel for vehicle fleets in the United States and Canada. It designs, builds, finances, and operates fueling stations; and supplies compressed and liquefied natural gas. Clean Energy Fuels Corp. also produces renewable biomethane, which could be used as vehicle fuel. In addition, it provides natural gas conversions, alternative fuel systems, application engineering, service and warranty support, and research and development for natural gas vehicles. As of December 31, 2009, the company served approximately 390 fleet customers operating 17,790 natural gas vehicles in public transit, refuse hauling, airports, taxis, seaports, and regional trucking markets. It owned and operated 196 natural gas fueling stations in Arizona, California, Colorado, the District of Columbia, Florida, Georgia, Idaho, Maryland, Massachusetts, Nevada, New Jersey, New Mexico, New York, Ohio, Oklahoma, Texas, Virginia, Washington, and Wyoming; and British Columbia and Ontario, Canada. Clean Energy Fuels Corp. was incorporated in 2001 and is headquartered in Seal Beach, California.

Allegheny Energy, Inc. owns and operates electric generation facilities, and delivers electric services to customers in Pennsylvania, West Virginia, Maryland, and Virginia. The company owns or contractually controls coal-, gas-, and oil-fired generation facilities, as well as hydro generation facilities. It operates in two segments, The Merchant Generation and The Regulated Operations. The Merchant Generation segment owns, operates, and manages electric generation facilities, as well as purchases and sells energy and energy-related commodities. This segment markets its electric generation capacity to various customers and markets, including certain of its affiliates, as well as uses both derivative and nonderivative contracts to manage its portfolio of contracts. As of December 31, 2009, it owned or contractually controlled 7,015 megawatts of generation capacity. The Regulated Operations segment operates electric public utility systems that include electricity generation, transmission, and distribution facilities. As of December 31, 2009, it owned or contractually controlled 2,741 megawatts of generation capacity. This segment served approximately 383,600 customers in northern West Virginia; approximately 483,400 customers in portions of West Virginia, Maryland, and Virginia; approximately 102,000 customers in northern Virginia; and approximately 714,900 customers in southwestern, south-central, and northern Pennsylvania. The company is headquartered in Greensburg, Pennsylvania.

Omaha Public Power District (OPPD), a subdivision of the Nebraska state government, OPPD generates and distributes electricity to residents and businesses in 13 counties in southeastern Nebraska. It operates and maintains its facilities without tax revenues and raises money for major construction through bonds. OPPD serves more than 340,000 customers in an area covering 5,000 sq. mi. The utility has a generating capacity of more than 3,220 MW, which is powered by nuclear, coal, oil, and natural gas sources. It sells wholesale power to other utilities and offers energy consulting and management services.

UniSource Energy has more than one source of income, but it gets most of its revenues from its energy utilities. The company's Tucson Electric Power unit generates and distributes electricity to almost 402,000 customers in southeastern Arizona. The unit has about 2,230 MW of generating capacity. Subsidiary UniSource Energy Services provides electricity (through UNS Electric Services) to 90,000 customers and natural gas (through UNS Gas) to 146,000 customers in 30 communities in northern and southern areas of the state. UniSource's Millennium Energy Holdings unit invests in unregulated energy and emerging technology companies.

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