Natural Resource Partners L.P., together with its subsidiaries, owns, manages, and leases a portfolio of mineral properties in the United States. It operates in two segments: Mineral Rights and Soda Ash. The company holds interests in coal, soda ash, trona, and other natural resources. Its coal reserves are primarily located in the Appalachia Basin, the Illinois Basin, and the Northern Powder River Basin; it also holds industrial minerals and aggregates properties in the United States and oil and gas properties in Louisiana. It leases a portion of its reserves for royalty payments and owns and leases transportation and processing infrastructure related to its coal properties. Natural Resource Partners L.P. was incorporated in 2002 and is headquartered in Houston, Texas.