Exhibit 21.1

Subsidiaries of the Company

      The following is a complete list of the direct and indirect subsidiaries of Arch Coal, Inc., a Delaware corporation, including their respective states of incorporation or organization, as of February 28, 2007:

Arch Energy Resources, Inc. (Delaware)				100	%
Arch Reclamation Services, Inc. (Delaware)				100	%
Arch Western Acquisition Corporation (Delaware)				100	%
	Arch Western Resources, LLC (Delaware)			99	%
		Arch of Wyoming, LLC (Delaware)		100	%
			Arch Western Finance LLC (Delaware)	100	%
		Arch Western Bituminous Group LLC (Delaware)		100	%
			Canyon Fuel Company, LLC (Delaware)	65	%*
			Mountain Coal Company, LLC (Delaware)	100	%
		Thunder Basin Coal Company, L.L.C. (Delaware)		100	%
			Triton Coal Company, LLC (Delaware)	100	%
Ark Land Company (Delaware)				100	%
	Western Energy Resources, Inc. (Delaware)			100	%
	Ark Land LT, Inc. (Delaware)			100	%
	Ark Land WR, Inc. (Delaware)			100	%
	Ark Land KH, Inc. (Delaware)			100	%
Allegheny Land Company (Delaware)				100	%
Apogee Holdco, Inc. (Delaware)				100	%
Arch Coal Sales Company, Inc. (Delaware)				100	%
Arch Coal Terminal, Inc. (Delaware)				100	%
Arch Receivable Company, LLC (Delaware)				100	%
Ashland Terminal, Inc. (Delaware)				100	%
Canyon Fuel Company, LLC (Delaware)				35	%*
Catenary Coal Holdings, Inc. (Delaware)				100	%
	Cumberland River Coal Company (Delaware)			100	%
	Lone Mountain Processing, Inc. (Delaware)			100	%
Catenary Holdco, Inc. (Delaware)				100	%
Coal-Mac, Inc. (Kentucky)				100	%
Energy Development Co. (Iowa)				100	%
Hobet Holdco, Inc. (Delaware)				100	%
Mingo Logan Coal Company (Delaware)				100	%
Mountain Gem Land, Inc. (West Virginia)				100	%
Mountain Mining, Inc. (Delaware)				100	%
Mountaineer Land Company (Delaware)				100	%
P.C. Holding, Inc. (Delaware)				100	%
Prairie Holdings, Inc. (Delaware)				100	%
Saddleback Hills Coal Company (Delaware)				100	%

* Canyon Fuel is listed in two places