1 EXHIBIT 21 SUBSIDIARIES OF ARCH COAL, INC. The following is a complete list of the direct and indirect subsidiaries of Arch Coal, Inc., a Delaware corporation: JURISDICTION OF NAME INCORPORATION ---- --------------- Arch Australia Pty Limited.......................................... New South Wales, Australia Arch Energy Resources, Inc.......................................... Delaware Arch Reclamation Services, Inc...................................... Delaware Arch Technology Corporation......................................... Delaware Ark Land Company.................................................... Delaware Ashland Coal, Inc................................................... Delaware Allegheny Land Company.............................................. Delaware Apogee Coal Company................................................. Delaware Arch Coal Sales Company, Inc........................................ Delaware Big Sandy Terminal, Inc............................................. Delaware Arch Coal Terminal, Inc............................................. Delaware Arch Coal International, Ltd........................................ Barbados Ashland Terminal, Inc............................................... Delaware Coal-Mac, Inc....................................................... Kentucky Catenary Coal Holdings, Inc......................................... Delaware Arch of Wyoming, Inc................................................ Delaware Catenary Coal Company............................................... Delaware Cumberland River Coal Company....................................... Delaware Lone Mountain Processing, Inc....................................... Delaware Mingo Logan Coal Company............................................ Delaware Mountain Gem Land, Inc.............................................. West Virginia Mountain Mining, Inc................................................ Delaware Hobet Mining, Inc................................................... West Virginia Julian Tipple, Inc.................................................. Delaware Mountaineer Land Company............................................ Delaware P. C. Holding, Inc.................................................. Delaware Energy Development Co............................................... Iowa Paint Creek Terminals, Inc.......................................... Delaware 54