ACCRUED CAPPING, CLOSURE AND POST CLOSURE (Tables)

9 Months Ended

Jan. 31, 2013

Changes to Accrued Capping, Closure and Post-Closure Liabilities

The changes to accrued capping, closure and post-closure liabilities for the nine months ended January 31, 2013 and 2012 are as follows:

	Nine Months Ended January 31,
	2013			2012
Beginning balance	$	39,629		$	36,407
Obligations incurred		2,606			2,350
Accretion expense		2,653			2,510
Payments		(2,304	)		(1,298	)
Ending balance	$	42,584		$	39,969