Alliance Resource Partners LP operates as a coal mining company based in the United States. It has four segments Illinois Basin, Appalachia, Oil & Gas Royalties and Coal Royalties. The Illinois Basin comprises underground mining complexes in Illinois, Indiana, Kentucky, Maryland and West Virginia. The Appalachia segment comprises the Mettiki mining complex, the Tunnel Ridge mining complex and the MC Mining complex. The Oil & Gas Royalties has oil & gas mineral interests held by AR Midland and AllDale I & II and includes Alliance Minerals' equity interests in both AllDale III and Cavalier Minerals. The Coal Royalties has included coal mineral reserves and resources owned or leased by Alliance Resource Properties.