EXHIBIT 11

MARKWEST HYDROCARBON, INC.
COMPUTATION OF EARNINGS PER COMMON SHARE
(in thousands, except per share data)

	Quarter Ended December 31, 2001		Year Ended December 31, 2001
Net income (loss)	$	1,547	$	2,810
Weighted average number of outstanding shares of common stock		8,494		8,478
Basic earnings (loss) per share	$	0.18	$	0.33
Net income (loss)	$	1,547	$	2,810
Weighted average number of outstanding shares of common stock		8,494		8,478
Dilutive stock options		9		21
		8,503		8,499
Earnings (loss) per share assuming dilution	$	0.18	$	0.33