Natural Resource Partners L.P. owns, operates, manages and leases a portfolio of mineral properties in the United States, including interests in coal, trona and soda ash, and other natural resources. Coal Royalty and Other segment consists primarily of coal royalty and coal related transportation and processing assets. As of December 31, 2016, Soda Ash segment included the Company's 49% non-controlling equity interest in Ciner Wyoming, a trona ore mining operation and soda...