Terranext focuses its earthbound geotechnical engineering expertise on the next project, as well as the one it is currently working on. An affiliate of engineering group BE&K, Terranext provides environmental engineering and consulting services to industrial, commercial, and government customers through half a dozen offices (in Alabama, Arizona, Colorado, Georgia, Kansas, and New Jersey). The company's services include air quality management, cultural, and natural resource conservation, energy reduction engineering, pollution prevention, water management, and site investigation and remediation. Since 1985 the woman-owned business has conducted more than 3,000 environmental projects.

Atmos Energy Corporation, together with its subsidiaries, engages primarily in the distribution, transmission, and storage of natural gas in the United States. The company operates in four segments: Natural Gas Distribution; Regulated Transmission and Storage; Natural Gas Marketing; and Pipeline, Storage, and Other. The Natural Gas Distribution segment involves in regulated natural gas distribution business and related sales operations. It distributes natural gas through regulated sales and transportation arrangements to approximately 3 million residential, commercial, public authority, and industrial customers in 12 states located primarily in the southern United States. As of September 30, 2009, this segment owned approximately 70,879 miles of underground distribution and transmission mains. The Regulated Transmission and Storage segment transports natural gas for third parties and manages five underground storage reservoirs in Texas. It owned 5,950 miles of gas transmission and gathering lines. The Natural Gas Marketing segment provides various natural gas management and marketing services to municipalities, other local gas distribution companies, and industrial customers. The Pipeline, Storage, and Other segment offers natural gas gathering, transmission, and storage services. It owned 113 miles of gas transmission and gathering lines. Atmos Energy Corporation was founded in 1906 and is headquartered in Dallas, Texas.

Niska Gas Storage Partners LLC owns and operates natural gas storage assets in North America. It owns or contracts for approximately 185.5 billion cubic feet of total gas storage capacity. Niska Gas Storage Partners LLC owns and operates gas storage facilities in Alberta, Canada, as well as in northern California and Oklahoma, the United States. Its gas storage customers include financial institutions, producers, marketers, power generators, pipelines, and municipalities. The company was founded in 2006 and is headquartered in Houston, Texas.

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.

Let's cut right to the point: construction materials and mining used to be the lifeblood of Knife River Corporation, but in recent years, its energy and utility operations have grown to be the largest portion of its business. Oil and natural gas production, power transmission, pipelines and power utilities now dominate Knife River's balance sheet. But don't count out its construction services division, which continues to produce record earnings. Knife River has operations in Alaska, Hawaii, Oregon, California, Idaho, Minnesota, Montana, North Dakota, Oregon, Texas, and Wyoming. The company is a subsidiary of MDU Resources Group, Inc.

Integrys Energy Group, Inc., through its subsidiaries, operates as a regulated electric and natural gas utility company in the United States and Canada. It provides natural gas utility services in Chicago, Wisconsin, Michigan, and Minnesota. As of December 31, 2009, Integrys Energy Group, Inc. served approximately 1,669,000 residential, commercial and industrial, transportation, and other customers. It had approximately 22,000 miles of natural gas distribution mains; and approximately 1,010 miles of natural gas transmission mains. The company also generates and distributes electric energy form coal, natural gas, fuel oil, hydroelectric, and wind resources in Wisconsin and Michigan. It served approximately 489,000 residential, commercial and industrial, wholesale, and other customers. In addition, Integrys Energy offers nonregulated energy supply and services; and electric transmission services. Integrys Energy Group, Inc. was formerly known as WPS Resources Corporation and changed its name to Integrys Energy Group, Inc. in February 2007. Integrys Energy Group, Inc. was founded in 1883 and is based in Chicago, Illinois.

A2A S.p.A. municipal multi-utility supplies electricity, natural gas, and water and wastewater services to customers, mostly in the province of Milan. A2A's units operate power-generation plants with some 3,700 MW of capacity),. The company distributes electricity and natural gas to regulated customers, and wholesale electricity and gas to buyers. It also owns a fiber-optic network that covers the city. A2A is also a leading environmental service company, treating some 2.9 million tonnes of waste material.

Southern Union Company, together with its subsidiaries, engages in the gathering, processing, transportation, storage, and distribution of natural gas in the United States. It operates in three segments: Transportation and Storage, Gathering and Processing, and Distribution. The Transportation and Storage segment engages in the interstate transportation and storage of natural gas in the Midwest and from the Gulf Coast to Florida. It also provides liquefied natural gas (LNG) terminalling and regasification services. The Gathering and Processing segment involves in gathering, treating, processing, and redelivering natural gas and natural gas liquids (NGLs) in Texas and New Mexico. It operates a network of approximately 5,500 miles of natural gas and NGL pipelines, 4 cryogenic processing plants with a combined capacity of 410 MMcf/d, and 5 natural gas treating plants with a combined capacity of 585 MMcf/d. The Distribution segment engages in the local distribution of natural gas in Missouri and Massachusetts. This segment serves approximately 550,000 residential, commercial, and industrial customers through local distribution systems consisting of 9,140 miles of mains, 6,185 miles of service lines, and 45 miles of transmission lines. Southern Union company was founded in 1932 and is based in Houston, Texas.

IBERDROLA, S.A., together with its subsidiaries, engages in producing, switching, retailing, and distributing electricity and gas. The company primarily generates nuclear, fossil-fuel, hydroelectric, and wind power. It also offers raw materials or primary energies required for electric power generation; energy, engineering, computer, and telecommunications services; services relating to the Internet; urban and gas retailing services; regasification, transmission or distribution services, as well as other gas storage services; assistance and support services; and real estate and other related services. In addition, the company involves in the treatment and distribution of water; representation, marketing, and distribution of various goods and services, products, articles, merchandise, computer programs, industrial equipment, machinery, machine and hand tools, spare parts, and accessories; and research, plan, and study of investment and corporate organization projects, as well as develops, sets up, and promotes industrial, commercial, and service companies. As of December 31, 2009, it served approximately 10 million users in Spain; 3.2 million electric customers and 2 million gas customers in the United Kingdom; 1.84 million electric customers and 0.93 million gas users in Latin America. The company is based in Bilbao, Spain.

RPG Enterprises has more than 20 companies that span energy, retail, manufacturing, technology, and entertainment. The company's primary operations include electricity generation and distribution (through CESC Limited and Noida Power) and utility and telecommunications infrastructure development, as well as carbon black production and tire manufacturing. Other operations include supermarkets (Spencer's Hypermarket), retail music and health and beauty stores, software, telecommunications, pharmaceuticals, and music recording businesses. RPG Enterprises is controlled by the Goenka family; the company was formed in 1979 to hold the family's diversified business interests.

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