United States Lime & Minerals, Inc. is engaged in lime and limestone operations. The Company is a manufacturer of lime and limestone products and supplying primarily the construction, including highway, road and building contractors; industrial, including paper and glass manufacturers; metals, including steel producers; environmental, including municipal sanitation and water treatment facilities and flue gas treatment processes; roof shingle manufacturers, agriculture and oil and gas services industries. It extracts limestone from its open-pit quarries and underground mines and then processes it for sale as pulverized limestone, aggregate, quicklime, hydrated lime, and lime slurry. The Company operates lime and limestone plants and distribution facilities in Arkansas, Colorado, Louisiana, Missouri, Oklahoma and Texas through its subsidiaries, Arkansas Lime Company, ART Quarry TRS LLC, Colorado Lime Company, Mill Creek Dolomite, LLC, Texas Lime Company, U.S. Lime Company, and others.