ASSET RETIREMENT OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2019

Mt. Hope Project and within the boundaries of the Plan of Operations ("PoO")

Property, plant and equipment

Asset retirement obligations for future mine closure and reclamation costs

	(in thousands)
At January 1, 2018	$	1,568
Accretion Expense		103
Adjustments*		(38)
At December 31, 2018	$	1,633
Accretion Expense		108
Adjustments*		62
At December 31, 2019	$	1,803

* Includes additions, annual changes to the escalation rate, the market-risk premium rate, or reclamation time periods

Liberty Project

Property, plant and equipment

Asset retirement obligations for future mine closure and reclamation costs

	Mt. Hope Project
	outside PoO
	boundary		Liberty
	(in thousands)
At January 1, 2018	$	15	$	121
Adjustments *		—		—
At December 31, 2018	$	15	$	121
Adjustments *		2		13
At December 31, 2019	$	17	$	134

* Includes reduced / reclaimed disturbance