Exhibit 12.1

Computation of Ratio of Earnings to Combined Fixed Charges and Preference Dividends

	Year Ended December 31
	2007			2006			2005			2004			2003
				(Dollars in thousands, except ratios)
Earnings:
Pretax income (loss) excluding income or loss from equity investments	$	156,210		$	264,261		$	6,864		$	105,435		$	(34,444	)
Adjustments:
Fixed charges		100,071			84,678			82,104			66,614			53,067
Distributed income from equity investments		1,672			—			—			17,678			49,686
Capitalized interest, net of amortization		(16,849	)		(14,578	)		(4,248	)		(162	)		—
Arch Western Resources, LLC dividends on preferred membership interest		(85	)		(96	)		(96	)		(96	)		(95	)
Total earnings	$	241,019		$	334,265		$	84,624		$	189,469		$	68,214
Fixed charges:
Interest expense	$	74,865		$	64,364		$	72,409		$	62,634		$	50,133
Capitalized interest		17,967			14,807			4,248			162			—
Arch Western Resources, LLC dividends on preferred membership interest		85			96			96			96			95
Portions of rent which represent an interest factor		7,154			5,411			5,351			3,722			2,839
Total fixed charges	$	100,071		$	84,678		$	82,104		$	66,614		$	53,067
Preference dividends		219			378			15,579			7,187			6,589
Total fixed charges and preference dividends	$	100,290		$	85,056		$	97,683		$	73,801		$	59,656
Ratio of earnings to fixed charges and preference dividends		2.40	x		3.93	x		(a	)		2.57	x		1.14	x

(a) Combined fixed charges and preference dividends exceeded earnings by $13.1 million for the year ended December 31, 2005.