Plant, Equipment, and Mine Development, Net

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Plant, Equipment, and Mine Development, Net

Plant, Equipment, and Mine Development, Net

The following table provides the components of Plant, equipment, and mine development, net (dollars in thousands):

	Depreciation Life or Method	September 30, 2021		December 31, 2020
Leach pads	Units-of-production	$	17,708	$	17,432
Process equipment	5 - 15 years	17,597		16,065
Buildings and leasehold improvements	10 years	10,507		10,507
Mine equipment	5 - 7 years	8,242		5,961
Vehicles	3 - 5 years	1,454		991
Furniture and office equipment	7 years	352		322
Mine development	Units-of-production	6,673		756
Mineral properties	Units-of-production	37		37
Construction in progress and other		36,529		33,185
		$	99,099	$	85,256
Less, accumulated depreciation and amortization		(29,322)		(25,033)
Total		$	69,777	$	60,223

Mine development

During the nine months ended September 30, 2021, the Company incurred costs of $5.9 million related to metallurgical testing and drill work.

Construction in progress and other

The primary project included in construction in progress as of September 30, 2021 was construction of a new larger leach pad, which continued through February 2021 at which time construction was suspended ($3.2 million, including $0.7 million of capitalized interest), resulting in construction costs for the new larger leach pad of $34.1 million since commencing construction in 2020.