Natural Resource Partners L.P. is a limited partnership. It is engaged principally in the business of owning, managing and leasing mineral properties in the United States. It owns coal reserves 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. In February 2012, it acquired coal reserves at the Deer Run mine near Hillsboro, Illinois and approximately 9,500 net mineral acres located in the Mississippian Lime oil play in Northern Oklahoma. In March 2012, it acquired the rail loadout, associated infrastructure assets and a contractual overriding royalty interest on certain tonnage at the Sugar Camp mine near Benton, Illinois. In May 2012, the Company completed the acquisition of approximately 19,200 net mineral acres in the Mississippian Lime oil play in North Central Oklahoma.