Natural Resource Partners L.P., through its subsidiaries, owns, manages, and leases a portfolio of mineral properties in the United States. It operates through two segments, Mineral Rights and Soda Ash. The company owns interests in coal, soda ash, trona, and other natural resources. Its coal reserves are primarily located in Appalachia, the Illinois Basin, and the Northern Powder River Basin in the United States; industrial minerals and aggregates properties are located in the United States; oil and gas properties located in Louisiana; timber assets located in West Virginia; and trona ore mining operation and soda ash refinery are located in the Green River Basin, Wyoming. The company leases a portion of its reserves in exchange for royalty payments; and owns and leases transportation and processing infrastructure related to coal properties. NRP (GP) LP serves as the general partner of the company. Natural Resource Partners L.P. was incorporated in 2002 and is headquartered in Houston, Texas.