Casella Waste Systems, Inc. provides resource management services, primarily in the areas of solid waste collection, transfer, disposal, and recycling services to the residential, commercial, municipal, and industrial customers in the United States. It offers non-hazardous solid waste services, including collection operations, transfer stations, material recycling facilities, and disposal facilities. The company also markets recyclable metals, aluminum, plastics, and paper and corrugated cardboard, which have been processed at its facilities; and recyclables purchased from third parties. In addition, it generates and sells electricity under a contract at a waste-to-energy facility. The company has operations in Vermont, New Hampshire, New York, Massachusetts, Maine, Connecticut, Pennsylvania, New Jersey, North Carolina, Tennessee, Georgia, Florida, Michigan, and Wisconsin. It has a 50% joint venture with US GreenFiber LLC to manufacture, market, and sell cellulose insulation, which is used in residential dwellings and manufactured housings. As of August 31, 2010, the company owned and/or operated 31 solid waste collection operations, 30 transfer stations, 34 recycling facilities, 8 subtitle D landfills, and 1 landfill permitted to accept construction and demolition materials, as well as 1 waste-to-energy facility. Casella Waste Systems, Inc. was founded in 1975 and is based in Rutland, Vermont.

Imperial Petroleum Recovery Corporation engages in the development and marketing of proprietary oil sludge remediation process and microwave separation technology (MST) equipment that use high energy microwaves to separate water, oil, and solids. The company offers MST to the oil field industry and develops the use of MST in the marine industry and in the production of biodiesel. MST technology uses radio frequency to separate water and oil emulsions. Imperial Petroleum offers four MST systems to be used in the oil and gas industry, including MST-1000, MST-2000, MST-4000, and MST-150. The company was incorporated in 1982 and is headquartered in Houston, Texas.

Conti Electric counts on commercial and industrial clients to keep it busy. The company designs, installs, and maintains electrical systems and equipment for customers throughout the Americas. The company's industrial division completes installation projects for such large-scale facilities as automobile plants, refineries, and manufacturers. Its commercial division focuses on shopping centers, casinos, and other smaller projects; the division also offers electrical maintenance services in the Midwest. Conti Electric was founded in 1969 and has operations in Delaware, Kansas, Michigan, Missouri, and Nevada.

HDR has left its mark on the US. HDR is an architecture, engineering, and consulting firm that specializes in projects including bridges, water- and wastewater-treatment plants, and hospitals. HDR also provides mechanical and plumbing services, construction and project management, and utilities planning. The group has completed projects throughout the US and in some 60 countries abroad and has more than 185 locations around the world. The employee-owned company was founded as Henningson Engineering in 1917 to build municipal plants in the rural Midwest.

Weeks Marine doesn't drag its feet when it comes to dredging. The company is one of the largest providers of dredging services in the Gulf of Mexico, where a majority of all US dredging occurs. (Dredging involves the moving of sand and sediment to maintain, and often deepen, navigation channels at shipping ports.) The family-owned company also performs construction and demolition of bridges, piers, jetties, pipelines, and offshore platforms throughout North and South America. It is also one of the largest stevedoring (cargo handling) companies on the US East Coast. Weeks Marine was originally founded in 1919 as the Weeks Stevedoring Company.

Global construction and engineering firm BAUER Aktiengesellschaft (BAUER Group) works from the ground up. The company is involved in excavation -- civil engineering projects that require digging to form a foundation, such as the building of tunnels, bridges, wells, wastewater treatment plants, and mining facilities. BAUER Group operates in three divisions: equipment, construction, and resources. The equipment division manufactures the anchors, drilling rigs, and heavy machinery used in excavation and mining projects, while the resources division supplies the other two divisions with materials and services. BAUER Group has operations in 60 countries.

Hardaway Construction is paying off all over the Southeast. The firm offers general contracting, construction management, and design/build services on both large and small projects. Known for the diversity of work it takes on, Hardaway has built everything from offices and schools to hospitals and industrial plants, among other commercial structures. Its Cumberland Builders unit focuses on the residential sector, building and remodeling condominiums and retirement facilities. The company's portfolio includes work on Vanderbilt University, the Gaylord Opryland Resort Hotel, and the Nashville International Airport. The family-owned company was founded in 1924 by the late L.H. Hardaway, Sr.

GeoTrans performs environmental engineering and consulting services, specializing in water and groundwater issues. A subsidiary of Tetra Tech, GeoTrans' helps businesses and government entities maintain the environment while taking care of business. Areas of expertise include environmental regulation compliance; water resource evaluation, planning, and development; solar energy consulting and services; resource optimization; remediation design and optimization; and sustainability strategy and analysis. GeoTrans has clients in the aerospace, automotive, energy, manufacturing, mining, and petrochemicals industries, among others.

The father of CEO John Lattimore, Jr., founded LMC in 1961. Giant aggregates supplier Holcim owns 49% of LMC through US unit Holcim Participations (US); the Lattimore family owns the rest. Lattimore Materials Company (LMC) has been mixing things up in Texas for 50 years. The company mines aggregates (gravel, sand, and limestone) and produces and delivers concrete, primarily in the Dallas/Ft. Worth area but also in Houston, San Antonio, and southern Oklahoma. LMC operates about 30 ready mix concrete plant and a handful of aggregate mines; it also maintains a fleet of more than 400 mixer and haul trucks. The company's mining operations supply aggregates to outside customers and to its own concrete plants.

Quanta Services, electric and gas utilities and telecom providers would be all juiced up with no way to go. The company designs, installs, repairs, and maintains network infrastructure nationwide, including electric, gas, broadband cable, and telephone and data lines. Quanta also provides outsource management services and other specialty services such as installing traffic and light rail control systems, conducting directional drilling and rock trenching, and constructing wind generation facilities. Around 85% of its revenues come from gas and electric work.

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