Property, Plant and Equipment, net and Intangibles, net (Tables)

12 Months Ended

Dec. 30, 2017

Components of Property, Plant and Equipment

	2017		2016
Land (mineral bearing) and asset retirement costs	$	274,083	$	227,558
Land (non-mineral bearing)		168,501		146,099
Buildings and improvements		170,615		160,638
Plants, machinery and equipment		1,068,007		965,522
Mobile equipment and barges		391,256		307,885
Truck and auto fleet		47,270		32,236
Landfill airspace and improvements		49,480		48,513
Office equipment		33,314		26,096
Construction in progress		44,739		16,459
Property, plant and equipment		2,247,265		1,931,006
Less accumulated depreciation, depletion and amortization		(631,841)		(484,554)
Property, plant and equipment, net	$	1,615,424	$	1,446,452

Estimated Useful Lives of Assets

Buildings and improvements	10 - 30	years
Plant, machinery and equipment	15 - 20	years
Office equipment	3 - 7	years
Truck and auto fleet	5 - 8	years
Mobile equipment and barges	6 - 8	years
Landfill airspace and improvements	10 - 30	years
Other	4 - 20	years

Intangible Assets by Type and in Total

	December 30, 2017						December 31, 2016
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Leases	$	15,888	$	(4,178)	$	11,710	$	15,888	$	(3,382)	$	12,506
Reserve rights		6,234		(1,625)		4,609		8,706		(3,710)		4,996
Trade names		1,000		(758)		242		1,000		(658)		342
Other		409		(137)		272		249		(104)		145
Total intangible assets	$	23,531	$	(6,698)	$	16,833	$	25,843	$	(7,854)	$	17,989

Estimated Amortization Expense for Intangible Assets

2018	$	1,281
2019		1,268
2020		1,185
2021		1,142
2022		1,113
Thereafter		10,844
Total	$	16,833

Summit Materials, LLC

Components of Property, Plant and Equipment

	2017		2016
Land (mineral bearing) and asset retirement costs	$	274,083	$	227,558
Land (non-mineral bearing)		168,501		146,099
Buildings and improvements		170,615		160,638
Plants, machinery and equipment		1,068,007		965,522
Mobile equipment and barges		391,256		307,885
Truck and auto fleet		47,270		32,236
Landfill airspace and improvements		49,480		48,513
Office equipment		33,314		26,096
Construction in progress		44,739		16,459
Property, plant and equipment		2,247,265		1,931,006
Less accumulated depreciation, depletion and amortization		(631,841)		(484,554)
Property, plant and equipment, net	$	1,615,424	$	1,446,452

Estimated Useful Lives of Assets

Buildings and improvements	10 - 30	years
Plant, machinery and equipment	15 - 20	years
Office equipment	3 - 7	years
Truck and auto fleet	5 - 8	years
Mobile equipment and barges	6 - 8	years
Landfill airspace and improvements	10 - 30	years
Other	4 - 20	years

Intangible Assets by Type and in Total

	December 30, 2017						December 31, 2016
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Leases	$	15,888	$	(4,178)	$	11,710	$	15,888	$	(3,382)	$	12,506
Reserve rights		6,234		(1,625)		4,609		8,706		(3,710)		4,996
Trade names		1,000		(758)		242		1,000		(658)		342
Other		409		(137)		272		249		(104)		145
Total intangible assets	$	23,531	$	(6,698)	$	16,833	$	25,843	$	(7,854)	$	17,989

Estimated Amortization Expense for Intangible Assets

2018	$	1,281
2019		1,268
2020		1,185
2021		1,142
2022		1,113
Thereafter		10,844
Total	$	16,833