Harry Mathews Jr. founded the privately-held company as the Mississippi Sand Company in Alton, Illinois in 1907. If you've been looking for lime in all the wrong places, your troubles are over. Mississippi Lime Company mines and manufactures such products as high-calcium lime, limestone, and other calcium-based chemicals used in agriculture applications or food additives. The company has operations in Missouri, South Carolina, West Virginia, and in Vicksburg, Mississippi, where its Falco Lime division is headquartered. Falco Lime serves customers in Arkansas, Louisiana, and Mississippi. Another division, Reagent Technology Services, provides air pollution control products.

Founded in 1952, ITL Corp. is owned by former president Michael Drusinsky. ITL Corp. has a soft spot in its heart when it comes to hardwood. The company, doing business as Industrial Timber and Lumber, produces Northern and Appalachian hardwood logs and lumber products from species that include black cherry, black walnut, maple, white ash, white oak, and poplar. The company sells to manufacturers of such wood products as cabinets, furniture, flooring, and veneer. ITL owns more than 50,000 acres of timberlands in New York, Ohio, Pennsylvania, and West Virginia, and it operates about 10 sawmill and dry kiln manufacturing facilities along the East Coast.

Rocky Top Building Products produces pressure-treated lumber and engineered wood for residential, commercial, agricultural, industrial, marine, and recreational applications. The company's products include dimension lumber, decking boards, railing, beams, lattice, and related fastening systems. The company operates facilities in Maryland, Pennsylvania, and Virginia, and sells its products to professional builders and do-it-yourselfers through dealers in about a dozen northeastern and mid-Atlantic states. A wholly owned subsidiary of the Franklin Group, Rocky Top was established in 1977.

Dynamic Systems, Inc. (DSI) is dynamite with pipes. The company fixes and installs plumbing and exhaust systems (without blowing them to bits). The mechanical contractor specializes in HVAC (heating, ventilation, and air conditioning), plumbing, and sanitary and exhaust piping projects for facilities including cleanrooms, hospitals, high-rise office buildings, and industrial plants. Biopharmaceutical and semiconductor firms Biogen Idec and Infineon Technologies are among its clients. It serves others in the health care, hospitality, and commercial sectors. The company has regional offices in Arizona, Massachusetts, North Carolina, Texas, and Virginia. DSI is a holding of Austin, Texas-based FGI Group, Inc.

Mercedes Homes won't put you up in a Benz, but it can set you up in a stylish dwelling. The employee-owned company builds and sells single-family homes in 80 communities in Florida, Texas, and the Carolinas. One of its largest markets is the Orlando area. Mercedes Homes operates through three primary subsidiaries: MHi Mortgage, BDR Title, and Space Coast Truss, which offer everything from mortgage financing to truss design and building materials. Mercedes Homes' properties range in price from about $100,000 to more than $500,000. The family of founder Howard Buescher controls the company he began in 1983. Faced with mounting debt and liquidity problems, Mercedes filed for Chapter 11 bankruptcy in 2009.

Masonite is known worldwide for innovation, quality products, exceptional customer service and a commitment to excellence. Over 80 years of dedication to innovation, technical advancements and customers make Masonite® the brand that builders, remodelers and consumers choose when creating homes of distinction.Headquartered in Tampa, Florida, Masonite employs over seven thousand people worldwide. At Masonite, employees from all parts of the company understand that people love their homes. Masonite is continually creating new and innovative products that will make any home more beautiful, more valuable and more enjoyable.

Fortis Construction isn't afraid to get its hands dirty. The fast-growing US construction company offers general contracting, preconstruction, construction management, and environmentally-friendly green building services to customers primarily in Portland, Oregon and others in the Pacific Northwest. It specializes in remodeling and upgrading corporate offices, health care facilities, retail complexes, and schools; it also conducts seismic and structural upgrades. Customers have included Oregon State University, Portland State University, PPG Industries, and StanCorp.

Established in 1887, the family-owned company primarily operates throughout northern and central California. Like grains of sand through an hourglass, so are the business days of Teichert. The company's materials division produces sand, gravel, and ready-mixed concrete and supplies it to manufacturers, contractors, and government agencies. In possession of the oldest active contractor's license in the state of California, Teichert Construction is involved in building roads, bridges, parks, airports, and more. Through its Angelo Utilities division, Teichert Construction provides trenching services for underground utility systems needed in residential subdivisions.

Aldridge Electric powers up the Windy City and other parts of the Midwest. The electrical contractor divides its business into six main areas: airport, industrial, power, drilling, highway, and transit. It works on projects ranging from Chicago's subway system to its airport runways. Additional activities include services for street lighting, traffic signals, high-voltage cabling and splicing, and foundation drilling. Aldridge Electric has worked for clients such as Commonwealth Edison Company and Exelon Corporation. The company is owned by CEO Ken Aldridge, grandson of company founder Leonard "Len" Aldridge, who started the business in the 1930s and incorporated it in 1952.

Hazen and Sawyer's focus on water, wastewater and solid waste solutions. The environmental engineering firm specializes in planning, designing, and constructing clean drinking water systems for public and private clients around the world. Specific areas of expertise include architectural design, aquatic sciences, biosolids management, buried infrastructure, odor control, resource economics, risk management, utility management services, and wastewater and stormwater collection. The employee-owned firm operates from some 25 offices throughout the eastern US and two international branch offices in South America.

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