7. MINING INTERESTS

The following table shows the breakdown of the cost, accumulated depreciation and net book value of plant and equipment, mining properties and construction in progress:



	Plant and equipment			Mining properties		Construction in progress			Total
Cost
As of December 31, 2016	461,438			746,657		131,409			1,339,504
Additions	649			632		63,072			64,353
Transfers	24,269			48,122		(72,391		)	—
Capitalized interest	—			—		5,285			5,285
Change in rehabilitation provision estimate	—			3,022		—			3,022
Disposals and other	(7,142		)	—		(452		)	(7,594		)
Balance at December 31, 2017	$	479,214		$	798,433	$	126,923		$	1,404,570
Additions	95			677		45,485			46,257
Transfers	16,516			127,902		(144,418		)	—
Capitalized interest	—			—		579			579
Change in rehabilitation provision estimate	—			3,218		—			3,218
Disposals and other	(17,065		)	—		—			(17,065		)
Balance at December 31, 2018	$	478,760		$	930,230	$	28,569		$	1,437,559

Accumulated depreciation
As of December 31, 2016	431,698			692,789		—			1,124,487
Depreciation and amortization	12,385			20,431		—			32,816
Disposals and other	(6,791		)	—		—			(6,791		)
Balance at December 31, 2017	$	437,292		$	713,220	$	—		$	1,150,512
Depreciation and amortization	12,349			20,900		—			33,249
Disposals and other	(16,842		)	—		—			(16,842		)
Balance at December 31, 2018	$	432,799		$	734,120	$	—		$	1,166,919

Carrying amount
Balance at December 31, 2017	$	41,922		$	85,213	$	126,923		$	254,058
Balance at December 31, 2018	$	45,961		$	196,110	$	28,569		$	270,640

As at December 31, 2018, equipment under finance leases had net carrying amounts of $3.0 million (December 31, 2017 - $1.6 million). The total minimum lease payments are disclosed in Note 12 - Debt.

No depreciation is charged to construction in progress assets. For the year ended December 31, 2018, the general capitalization rate for borrowing costs was 7%. Commercial production was achieved February 1, 2018, therefore no capitalized interest was recorded since.