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Martin Marietta Materials, Inc., together with its subsidiaries, engages in the production and sale of aggregates for the construction industry primarily in the United States, Canada, the Bahamas, and the Caribbean Islands. The company operates in four segments: Mideast Group, Southeast Group, West Group, and Specialty Products. It mines, processes, and sells granite, limestone, sand, gravel, and other aggregate products for use in the public infrastructure, and nonresidential and residential construction industries, as well as in the agriculture, railroad ballast, chemical, and other applications. The company also offers asphalt, ready mixed concrete, and road paving materials. In addition, it manufactures and markets magnesia-based chemical products for the industrial, agricultural, and environmental applications; and dolomitic lime primarily for use in the steel industry. These chemical products are used in flame retardants, wastewater treatment, pulp and paper production, and other environmental applications. Martin Marietta Materials, Inc. was founded in 1993 and is based in Raleigh, North Carolina.