Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Components of Inventories

	September 30,		December 31,
	2017		2016
Aggregate stockpiles	$	122,508	$	103,073
Finished goods		34,269		35,071
Work in process		7,685		6,440
Raw materials		17,322		13,095
Total	$	181,784	$	157,679

Summit Materials, LLC

Components of Inventories

	September 30,		December 31,
	2017		2016
Aggregate stockpiles	$	122,508	$	103,073
Finished goods		34,269		35,071
Work in process		7,685		6,440
Raw materials		17,322		13,095
Total	$	181,784	$	157,679