Natural Resource Partners L.P.is a limited partnership company. The Company is engaged principally in the business of owning, managing and leasing a portfolio of mineral properties in the United States, including interests in coal, trona and soda ash, crude oil and natural gas, construction aggregates, frac sand and other natural resources. The company’s coal reserves are located in the three United States coal-producing regions: Appalachia, the Illinois Basin and the Western United States, as well as lignite reserves in the Gulf Coast region. The company leases its reserves to mine operators under long-term leases that grant the operators the right to mine and sell its reserves in exchange for royalty payments. It also owns and manages infrastructure assets that generate revenues, primarily in the Illinois Basin.