Property, Plant and Mine Development, net

6 Months Ended

Jun. 30, 2022

Property, Plant and Mine Development, net

Property, Plant and Mine Development, net

8. Property, Plant and Mine Development, net

At June 30, 2022 and December 31, 2021, property, plant and mine development, net consisted of the following:

	As of		As of
	June 30,		December 31,
	2022		2021
	(in thousands)
Asset retirement costs	$	1,065	$	1,065
Construction-in-progress (1)		2,729		15,854
Furniture and office equipment		1,703		1,685
Land		9,230		9,230
Mineral interest		79,543		79,964
Light vehicles and other mobile equipment		2,376		2,224
Machinery and equipment		39,288		33,213
Mill facilities and infrastructure		35,200		24,973
Mine Development		98,900		92,138
Software and licenses		1,631		1,592
Subtotal		271,665		261,938
Accumulated depreciation and amortization		(118,888)		(105,167)
Total	$	152,777	$	156,771

(1) Includes accrued capital expenditures of $0.1 million and $1.7 million at June 30, 2022 and December 31, 2021, respectively.

The Company recorded depreciation and amortization expense of $7.3 million and $13.2 million, respectively, for the three and six months ended June 30, 2022 as compared to $4.4 million and $7.8 million, respectively, for the same periods ended June 30, 2021.