Exhibit 12.1

Ratio of Earnings to Fixed Charges

Great Lakes Dredge & Dock Corporation

(dollars in thousands)

	Year Ended December 31,													Three Months Ended March 31,
	2006		2007		2008			2009			2010			2011		2010
Pretax income from continuing operations (1)	$	1,270	$	11,519	$	9,126		$	26,102		$	54,888		$	4,516	$	16,193
Fixed charges		31,521		26,055		24,931			24,338			21,079			7,805		5,015
Capitalized Interest		—		—		(259	)		(162	)		(34	)		—		85
Distributed income of equity investees		650		2,400		625			621			—			—		—
	$	33,441	$	39,974	$	34,423		$	50,899		$	75,933		$	12,321	$	21,293
Fixed charges:
Interest expense and amortized deferred financing costs	$	24,547	$	18,209	$	17,395		$	16,393		$	13,592		$	5,950	$	3,143
Estimated interest expense in operating leases		6,974		7,846		7,536			7,945			7,487			1,855		1,872
Total fixed charges	$	31,521	$	26,055	$	24,931		$	24,338		$	21,079		$	7,805	$	5,015
Ratio of earnings to fixed charges		1.1		1.5		1.4			2.1			3.6			1.6		4.2