SCHEDULE II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2018

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, 2018
Allowance for doubtful accounts	$	2,390	$	963	$	-		$	-		$	3,353
Allowance for uncollectible notes receivable	227			-		-		227		^(a)		-
Inventory valuation allowance		143,961		36,878		5,158	^(b)		26,827	^(c)		159,170

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		38,488		-			29,389	^(c)		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		33,782		118	^(b)		29,622	^(c)		134,862

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

(b) Application of reserve policy to acquired inventories.