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State College / Pennsylvania / United States
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Founded in 1947, HRI is a family-owned contractor. It is a part of Colas SA, a multinational corporation. The company s construction services include asphalt paving, heavy and highway construction, structures, utilities and treatment plants and site work. It primarily undertakes projects of PennDOT and local municipalities. Headquartered in State College, Pa., the company also provides construction services to private customers. The company s projects ranges from multimillion dollar highway projects and large commercial site work to emulsion application, recreational facilities and parking lots. HRIs manufacturing facilities include more than five hot-mix asphalt plants and an emulsion plant. Its facilities provide a variety of bituminous products for numerous state and local agencies and private contractors, as well as company s own projects. The company owns more than 1,400 pieces of heavy construction equipment and maintains a fleet of trucks.
Marshall / Texas / United States
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Founded in 1970, Unimin Corporation is one of the leading producers of minerals worldwide. The company serves the glass, oil, paint, ceramic, plastic and construction industries. It offers talc, magnetite and kaolin in several specifications. Unimin Corporation provides feldspar, clay and quartz to its customers. The company has silica, dolomite and olivine available for the paper, rubber and metallurgical industries. It is involved in a variety of conservation and beautification projects, including the Audubon Society, Boy Scouts and Boy Scouts. Unimin Corporation is associated with the Wildlife Habitat Council, which specializes in the enhancement and preservation of wildlife. The company offers transportation and product management services. It also provides programs related to mineral production, mining and processing.
New Canaan / Connecticut / United States
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Founded in 1970, Unimin Corporation is one of the leading producers of industrial minerals in the world. It offers a range of application engineering and transportation services. The corporation provides technical advisory and research and development solutions. Unimin Corporation s products include silica sand, nepheline syenite, feldspar and ball clay materials. It also offers microcrystalline silica, kaolin, dolomite, magnetite and barium sulfate products. The corporation supplies raw materials for the glass, fiberglass, ceramic, semiconductor, quartz lighting, foundry, paint and coating, and oil and gas industries. In addition, Unimin Corporation serves clients in the plastic, rubber, paper, refractory, metallurgical and construction industries.
Little Rock / Arkansas / United States
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With companies located in more than 60 countries and worldwide sales reaching beyond $20 billion, 3M products are sold in more than 200 countries. A diversified technology company, 3M has a worldwide presence in the consumer and office; display and graphics; electro and communications; health care; industrial; safety, security and protection services; and transportation markets. The global enterprise utilizes intercompany cooperation in the research, manufacturing and marketing of its products. Its brands include Post-it, Scotch, Littmann, Nexcare First Aid and Filtrete. Tape, bandages, carpet cleaners, mounting products and air filters are some of the products the company manufactures. Headquartered in St. Paul, Minn., 3M also maintains facilities in cities such as Little Rock, Ark.
Mapleton Depot / Pennsylvania / United States
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U. S. Silica Company represents more than a century of mining and processing experience in industrial minerals. The company is a producer of grounded and ungrounded silica sand, kaolin clay, aplite and related industrial minerals. In 1987, Pennsylvania Glass Sand and Ottawa Silica Company merged, forming the present company. The union combined the marketing and production strength of two of North America s top silica companies. Headquartered in Berkeley Springs, W.Va., U. S. Silica Company is located along the East Coast and Midwest in cities such as Mapleton Depot, Pa.
Houston / Texas / United States
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Founded in 1882, Penn Virginia Corporation is engaged in the exploration, development and production of oil and natural gas, primarily in the eastern and Gulf Coast areas of the United States. Additionally, the company collects royalties on various oil and gas properties in which it owns a mineral fee interest. Penn Virginia employs more than 100 people, including nearly 35 employees who directly provide services through its general partner, Penn Virginia Resources. The company maintains its corporate offices in Radnor, Pa. Penn Virginia Corporation s common units are traded on the New York Stock Exchange under the symbol PVA.