SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2012

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

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, 2012
Allowance for doubtful accounts	$	5,295	$	774	$	-		$	-		$	6,069
Allowance for uncollectible notes receivable		295		145		-			-			440
Inventory valuation allowance		92,481		4,475		-			139	(a)		96,817
Accumulated amortization of intangible assets		12,824		3,593		-			425	(b)		15,992
Year ended December 31, 2011
Allowance for doubtful accounts	$	3,578	$	1,717	$	-		$	-		$	5,295
Allowance for uncollectible notes receivable		179		116		-			-			295
Inventory valuation allowance		87,044		7,882		2,154	(c)		4,599	(a)		92,481
Accumulated amortization of intangible assets		14,322		1,812		-			984 2,326	(b) (a)		12,824
Year ended December 31, 2010
Allowance for doubtful accounts	$	4,622	$	-	$	-		$	1,044	(d)	$	3,578
Allowance for uncollectible notes receivable		151		28		-			-			179
Inventory valuation allowance		82,674		4,370		-						87,044
Accumulated amortization of intangible assets		13,155		1,453		-			286	(b)		14,322

(a) Divestitures.

(b) Write off of fully amortized intangible assets.

(c) Acquisitions.

(d) To adjust allowance for change in estimates.