PLANT, PIPELINE AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2016

PLANT, PIPELINE AND EQUIPMENT [Abstract]

Plant, Pipeline and Equipment

Plant, pipeline and equipment include the following at December 31:

	2016			2015
	(thousands of dollars)
Platinum catalyst	$	1,612		$	1,612
Land		5,376			4,577
Plant, pipeline and equipment		154,107			128,302
Construction in progress		33,391			8,980
Total plant, pipeline and equipment		194,486			143,471
Less accumulated depreciation		(54,477	)		(46,564	)
Net plant, pipeline and equipment	$	140,009		$	96,907