Annual report pursuant to Section 13 and 15(d)

Accrued Closure Costs and ARO (Tables)

Accrued Closure Costs and ARO (Tables)

12 Months Ended

Dec. 31, 2017

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

Changes to reported closure liabilities for the years ended December 31, 2017 and 2016, were as follows:

Amounts in thousands
Balance as of December 31, 2015	$	5,301
Accretion expense		374
Payments		(693	)
Adjustment to closure liability		2,333
Balance as of December 31, 2016		7,315
Accretion expense		460
Payments		(2,037	)
Adjustment to closure liability		2,657
Balance as of December 31, 2017	$	8,395

Schedule of Asset Retirement Obligations

The reported closure asset or ARO, is reported as a component of “Net Property and equipment” in the Consolidated Balance Sheet at December 31, 2017 and 2016 with the following activity for the years ended December 31, 2017 and 2016:

Amounts in thousands
Balance as of December 31, 2015	$	2,575
Amortization of closure and post-closure asset		(760	)
Adjustment to closure and post-closure asset		2,333
Balance as of December 31, 2016		4,148
Amortization of closure and post-closure asset		(1,071	)
Impairment of closure and post-closure asset		(413	)
Adjustment to closure and post-closure asset		1,257
Balance as of December 31, 2017	$	3,921