Alliance Resource Partners, L.P. is a producer and marketer of coal primarily to the United States utilities and industrial users. The Company operates through segments, including Illinois Basin, Appalachia, and Other and Corporate. It operates over 10 underground mining complexes in Illinois, Indiana, Kentucky, Maryland and West Virginia. The Illinois Basin segment consists of various operating segments, including Webster County Coal's Dotiki mining complex, Gibson County Coal's mining complex, which includes the Gibson North mine and Gibson South mine, Hopkins County Coal's mining complex, which includes the Elk Creek mine and the Fies property, White County Coal's Pattiki mining complex, Warrior's mining complex, Sebree Mining's mining complex, which includes the Onton mine and River View's mining complex. The Appalachia segment consists of multiple operating segments, including the Mettiki mining complex, the Tunnel Ridge mining complex and the MC Mining mining complex.