Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2012

Asset Retirement Obligations

Schedule of roll forward of asset retirement obligation liability

	December 31,
	2012			2011
Balance beginning of year	$	10,006,769		$	9,834,021
Accretion expense	495,389			489,077
Liabilities incurred	418,305			87,106
Liabilities settled	(787,745		)	(404,594		)
Revisions	896,488			1,159
Balance end of year	$	11,029,206		$	10,006,769