Asset Retirement Obligations

9 Months Ended

Sep. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

8. ASSET RETIREMENT OBLIGATIONS

The following table summarizes the changes in the reserve for future restoration and reclamation costs on the balance sheet:

	September 30, 2018			December 31, 2017
(thousands of dollars)
Balance, beginning of period	$	5,731		$	4,789
Liabilities settled		(485	)		(97	)
Accretion expense		401			1,039
Balance, end of period		5,647			5,731
Less: Current portion		(597	)		(1,078	)
Non-current portion	$	5,050		$	4,653

The Company is currently performing plugging and surface reclamation activities at its Rosita and Vasquez projects located in Duval County, Texas. The Company’s current liability of $0.6 million consists of the estimated costs associated with current reclamation activities through December 2019 at the Company’s Vasquez projects.