MarkWest Energy Partners, L.P.
Calculation of Earnings to Fixed Charges
(Dollar amounts in thousands)

	2007			2008			2009			2010			2011			2012 (through June 30, 2012)

Total fixed charges	$	49,191		$	86,559		$	112,981		$	120,711		$	123,893		$	69,507

Earnings:
Earnings from continuing operations before income taxes		(59,155	)	$	273,602		$	(155,370	)	$	34,291		$	119,894		$	252,427
Add:
Fixed charges		49,191			86,559			112,981			120,711			123,893			69,507
Amortization of capitalized interest		478			1,110			1,444			1,583			1,639			1,020
Cash distributions from equity method investments		10,840			445			—			2,508			300			1,700
(Income) Loss from equity method investments		(5,309	)		(90	)		(3,505	)		(1,562	)		1,095			(542	)
Subtract:
Interest capitalized		(3,344	)		(9,486	)		(12,228	)		(2,766	)		(1,121	)		(8,048	)

Total earnings	$	(7,299	)	$	352,140		$	(56,678	)	$	154,765		$	245,700		$	316,064

Ratio		(0.15	)		4.07			(0.50	)		1.28			1.98			4.55

Deficit	$	(56,490	)	$	—		$	(169,659	)	$	—		$	—