NOTE 3—PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following:


	December 31,
(In thousands)	2019		2018
Plant and equipment	$	142,773	$	109,911
Construction in process		11,986		12,066
Capitalized mine development cost		58,773		43,037
Less: accumulated depreciation and amortization		(35,330)		(15,809)
Total property, plant and equipment, net	$	178,202	$	149,205

Capitalized amounts related to coal reserves at properties where we are not currently engaged in mining operations totaled $12.7 million as of December 31, 2019 and $5.5 million as of December 31, 2018.

Depreciation and amortization included:



	Year ended December 31,
(In thousands)	2019		2018		2017
Depreciation of plant and equipment	$	14,219	$	9,751	$	2,618
Amortization of capitalized
mine development costs		5,302		2,672		536
Total depreciation and amortization	$	19,521	$	12,423	$	3,154

On March 29, 2017, we acquired approximately 14,800 acres of coal properties in Tazewell and Buchanan Counties, Virginia and McDowell County, West Virginia including several coal leaseholds adjacent to our Knox Creek operations. We paid $125,000 for the properties, a portion of which is recoupable from future production, and agreed to pay an overriding royalty on production from properties not already subleased.

In the fourth quarter of 2019, we acquired multiple permits from various affiliates of Omega Highwall Mining, LLC. Consideration for the transaction included assumption of approximately $0.6 million of ARO liability, curing minor lease defaults, and paying advance royalties under two assumed lease instruments. The total out-of-pocket consideration was less than $0.1 million, most of which is recoupable against future royalty payments. These permits are in close proximity to our Knox Creek preparation plant and loadout infrastructure, and provide immediate access to two separate mining areas in Southwestern Virginia.

On January 3, 2020, we entered into a mineral lease with the McDonald Land Company for coal reserve tracts which, in many cases, are located immediately adjacent to our Elk Creek complex. This lease adds more than 21 million proven and probable reserves in approximately 20 different coal seams to our Elk Creek reserve base.