Inventory and Ore on Leach Pads

12 Months Ended

Dec. 31, 2018

Inventory consists of the following:



In thousands	December 31, 2018		December 31, 2017
Inventory:
Concentrate	$	10,772	$	6,831
Precious metals	20,761		18,803
Supplies	34,746		32,596
	66,279		58,230
Ore on leach pads:
Current	75,122		73,752
Non-current	66,964		65,393
	142,086		139,145
Total inventory and ore on leach pads	$	208,365	$	197,375

In 2018, Silvertip recognized a $26.7 million write-down of metal inventory as a result of lower than expected production levels, grades and recovery rates as well as reduced process plant availability and unfavorable changes in metal prices. It is possible that additional write-downs will be required as the Company works to optimize operations at Silvertip.