Calvalley Petroleum searches below the plateau for fuel for its customers. The company focuses on exploring for and producing oil and natural gas at Block 9 in the Republic of Yemen. The company, which has about 16 working wells (more than 50 have been drilled), produces some 5,000 barrels of oil each day. Its subsidiary Calvalley Petroleum (Cyprus) Ltd. is the operator of the property, which includes about 552,000 acres of land in the Sayun-Masila basin. Calvalley Petroleum has a net proved plus probable reserves of 7.8 billion barrels of oil equivalent.

Middle Tennessee Electric Membership Corporation's service territory is smack dab in the middle of Tennessee. The utility company distributes electricity to about 180,000 residential and business customers (member/owners) in four counties (Cannon, Rutherford, Williamson, and Wilson), via 10,000 miles of power lines connected to about 30 electric distribution substations. Middle Tennessee Electric purchases its power supply from the Tennessee Valley Authority. The corporation is Tennessee's largest electric cooperative and the sixth largest in the US.

Modesty notwithstanding, Modesto Irrigation District (MID) does much more than irrigate 59,000 acres of land in the Modesto, California area. The state-owned utility also generates, transmits, and distributes electricity to more than 91,270 residential and about 12,700 commercial and industrial customers; markets wholesale power; and treats and provides drinking water to the city of Modesto for distribution purposes. The company is a not-for-profit organization formed by the government of Stanislaus County in 1887 to provide irrigation services in the Modesto region.

Ohio Valley Electric and its subsidiary, Indiana-Kentucky Electric, generate power in the Ohio River Valley region. The company operates two coal-fired plants with collectively about 2,400 MW of generating capacity. Ohio Valley Electric's Kyger Creek Plant at Cheshire, Ohio, and Indiana-Kentucky Electric's Clifty Creek Plant at Madison, Indiana are linked by 776 miles of transmission lines. Most of Ohio Valley Electric's power goes to its shareholders, which include American Electric Power (39%), Buckeye Power Generating, LLC (18%), and Duke Energy Ohio (9%).

NORESCO provides utility customers in the US with infrastructure development, design/build services, commissioning strategies, financing, and client-centered asset management services. The company develops and implements build/own/operate distributed generation, cogeneration, or combined heat and power projects; arranges, on a consulting basis, commodity electricity or gas supply; and provides firm contracting of energy supply. It also holds interests in independent power plants. Global leader in HVAC products and systems Carrier, a unit of UTC, owns NORESCO.

Energy and Power Solutions (EPS) would like to help. The start up company, which promises up to a 25% energy savings using its methods, makes most of its money building on-site clean energy power plants. It also sells electrical and thermal power and operates power plants on behalf of its customers. But EPS touts its xChange Point energy monitoring software as the growth engine of the future. The software tracks energy use at the device, plant, and enterprise level in real time; EPS analysts use the data to recommend energy saving changes. The company, which filed to go public in 2010, has four customers using its products at more than 60 locations.

SEMCO ENERGY is owned by energy investment firm Continental Energy Systems through its Cap Rock Holding unit. Alaska and Michigan have more in common than a cold climate. SEMCO ENERGY serves approximately 410,000 natural gas consumers in both states. The company's main subsidiary is utility SEMCO ENERGY Gas, which distributes gas to about 280,000 customers in 24 Michigan counties. SEMCO's ENSTAR Natural Gas unit distributes gas to about 130,000 customers in and around Anchorage, Alaska. The company's unregulated operations include propane distribution in Michigan and Wisconsin; pipeline and storage facility operation; and information technology outsourcing.

Suffolk County Water Authority provides water services to 375,600 homes and businesses (more than 1.2 million people) in New York's Suffolk County, on the eastern end of Long Island. The water authority's system (the largest water system in the nation operating entirely with groundwater) includes more than 5,500 miles of mains. The authority also runs the largest groundwater testing facility in the US. Suffolk County Water Authority is a public benefit corporation of the state of New York.

Southern California Edison (SCE) distributes electricity to a population of more than 13 million people in central, coastal, and Southern California (excluding Los Angeles and some other cities in the regions). The utility's system consists of about 12,000 circuit miles of transmission lines and more than 113,500 circuit miles of distribution lines. SCE also has 5,500 MW of net generating capacity from interests in nuclear, hydroelectric, and fossil-fueled power plants; it sold most of its fossil-fueled facilities in response to the state's deregulation legislation. The utility sells excess power to wholesale customers. SCE is a subsidiary of Edison International.

Connecticut Water Service, Inc., through its subsidiaries, operates as a regulated water company in Connecticut. It operates in three segments: Water Activities, Real Estate Transactions, and Services and Rentals. The Water Activities segment supplies drinking water. The Real Estate Transactions segment involves in the sale or donation of its real estate holdings. The Services and Rentals segment provides contracted services to water and wastewater utilities and other clients, which include contract operations of water and wastewater facilities; Linebacker, an optional service line protection program that comprises repairing or replacing leaking or broken water service line, curb box, curb box cover, meter pit, meter pit cover, meter pit valve, and in-home water main shut off valve before the meter; and providing bulk deliveries of emergency drinking water to businesses and residences through tanker trucks. This segment also engages in leasing and renting residential and commercial properties. As of December 31, 2009, Connecticut Water Service, Inc. served 88,534 customers in 54 towns in Connecticut. The company was founded in 1956 and is headquartered in Clinton, Connecticut.

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