Exhibit 12.1

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

	Six Months Ended June 30
	2008			2007
Earnings:
Pretax income excluding income or loss from equity investments	$	247,071		$	69,278
Adjustments:
Fixed charges		45,465			47,553
Distributed income from equity investments		930			997
Capitalized interest, net of amortization		(3,183	)		(10,410	)
Arch Western Resources, LLC dividends on preferred membership interest		(61	)		(50	)
Total earnings	$	290,222		$	107,368
Fixed charges:
Interest expense		39,209		$	35,991
Capitalized interest		5,048			10,570
Arch Western Resources, LLC dividends on preferred membership interest		61			50
Portions of rent which represent an interest factor 3		1,147			942
Total fixed charges		45,465		$	47,553
Preferred stock dividends		18			44
Total fixed charges and preferred stock dividends	$	45,483		$	47,597
Ratio of earnings to combined fixed charges and preference dividends		6.38x			2.26x