SCHEDULE II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

Col A	Col B		Col C					Col D			Col E
			Additions
Description	Balance at beginning of period		(1) Charged to costs and expenses		(2) Charged to other accounts- describe			Deductions-describe			Balance at end of period
	(Amounts in Thousands)

Year ended December 31, 2017
Allowance for doubtful accounts	$	6,266	$	-	$	-		$	3,876	^(a)	$	2,390
Allowance for uncollectible notes receivable	437			-		-		210		^(a)		227
Inventory valuation allowance		134,862		9,099		0			0			143,961

Year ended December 31, 2016
Allowance for doubtful accounts	$	6,940	$	-	$	-		$	674	^(a)	$	6,266
Allowance for uncollectible notes receivable		585		-		-			148	^(a)	437
Inventory valuation allowance		130,584		4,160		118	^(b)		-			134,862

Year ended December 31, 2015
Allowance for doubtful accounts	$	4,077	$	2,863	$	-		$	-		$	6,940
Allowance for uncollectible notes receivable		1,486	0			-			901	^(a)		585
Inventory valuation allowance		119,189		13,365		1,400	^(b)		3,370	^(c)		130,584

(a) Write off of uncollectible accounts and change in estimates.

(b) Application of reserve policy to acquired inventories.