Property and Equipment, net

12 Months Ended

Dec. 31, 2015

Property and equipment, net consists of the following:



	December 31, 2015		December 31, 2014		Estimated Useful Life (in years)
Railroad and equipment	$	33,626	$	33,627	15-30
Machinery and equipment	15,587		16,498		3-10
Office equipment	16,662		18,844		3-10
Autos and trucks	1,044		866		3-10
	66,919		69,835
Less: Accumulated depreciation	57,103		60,284
	9,816		9,551
Construction in progress	329		652
Total property and equipment, net	$	10,145	$	10,203

Depreciation expense on property and equipment was $2.8 million in 2015, $2.2 million in 2014 and $2.5 million in 2013.