10-Q

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2013

OR

[    ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to

Commission File Number 1-12744

            MARTIN MARIETTA MATERIALS, INC.            

(Exact name of registrant as specified in its charter)

North Carolina	56-1848578
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)
2710 Wycliff Road, Raleigh, NC	27607-3033
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code                919-781-4550            

Former name:	None
	Former name, former address and former fiscal year, if changes since last report.

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

                                                                      Yes  þ            No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes  þ                                         No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  þ	Accelerated filer  ¨
Non-accelerated filer  ¨	Smaller reporting company  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

                                     Yes  ¨            No  þ

Indicate the number of shares outstanding of each of the issuer’s classes of Common Stock, as of the latest practicable date.

Class	Outstanding as of October 30, 2013
Common Stock, $0.01 par value	46,248,559

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

	Page
Part I. Financial Information:
Item 1. Financial Statements.
Consolidated Balance Sheets – September 30, 2013, December 31, 2012 and September  30, 2012		3
Consolidated Statements of Earnings and Comprehensive Earnings - Three and Nine Months Ended September  30, 2013 and 2012		4
Consolidated Statements of Cash Flows - Nine Months Ended September 30, 2013 and 2012		5
Consolidated Statement of Total Equity - Nine Months Ended September 30, 2013		6
Notes to Consolidated Financial Statements		7
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.		26
Item 3. Quantitative and Qualitative Disclosures About Market Risk.		51
Item 4. Controls and Procedures.		52
Part II. Other Information:
Item 1. Legal Proceedings.		53
Item 1A. Risk Factors.		53
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.		53
Item 4. Mine Safety Disclosures.		53
Item 6. Exhibits.		54
Signatures		55
Exhibit Index		56

Page 2 of 56

PART I. FINANCIAL INFORMATION

Item 1.   Financial Statements.

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	September 30, 2013		December 31, 2012		September 30, 2012
	(Unaudited)		(Audited)		(Unaudited)
	(Dollars in Thousands, Except Per Share Data)
ASSETS
Current Assets:
Cash and cash equivalents	$	57,241	$	25,394	$	35,421
Accounts receivable, net		331,030		224,050		296,947
Inventories, net		350,438		332,311		335,092
Current deferred income taxes		77,005		77,716		79,758
Other current assets		29,955		40,930		37,889
Total Current Assets		845,669		700,401		785,107
Property, plant and equipment		3,942,138		3,812,587		3,775,320
Allowances for depreciation, depletion and amortization		(2,159,520)		(2,059,346)		(2,024,379)
Net property, plant and equipment		1,782,618		1,753,241		1,750,941
Goodwill		616,634		616,204		615,986
Other intangibles, net		49,035		50,433		51,330
Other noncurrent assets		43,149		40,647		39,840
Total Assets	$	3,337,105	$	3,160,926	$	3,243,204
LIABILITIES AND EQUITY
Current Liabilities:
Bank overdraft	$	10,437	$	-	$	102
Accounts payable		111,266		83,537		99,628
Accrued salaries, benefits and payroll taxes		20,655		19,461		17,436
Pension and postretirement benefits		1,992		6,851		6,442
Accrued insurance and other taxes		34,444		28,682		34,175
Income taxes		1,720		287		13,291
Current maturities of long-term debt and short-term facilities		6,169		5,676		6,671
Accrued interest		18,158		7,490		18,209
Other current liabilities		21,591		21,351		21,155
Total Current Liabilities		226,432		173,335		217,109
Long-term debt		1,107,192		1,042,183		1,092,117
Pension, postretirement and postemployment benefits		171,695		183,122		135,761
Noncurrent deferred income taxes		243,858		225,592		243,759
Other noncurrent liabilities		89,045		86,395		84,437
Total Liabilities		1,838,222		1,710,627		1,773,183
Equity:
Common stock, par value $0.01 per share		461		459		458
Preferred stock, par value $0.01 per share		-		-		-
Additional paid-in capital		431,122		414,657		408,898
Accumulated other comprehensive loss		(102,710)		(106,169)		(77,480)
Retained earnings		1,131,276		1,101,598		1,098,529
Total Shareholders’ Equity		1,460,149		1,410,545		1,430,405
Noncontrolling interests		38,734		39,754		39,616
Total Equity		1,498,883		1,450,299		1,470,021
Total Liabilities and Equity	$	3,337,105	$	3,160,926	$	3,243,204

See accompanying notes to consolidated financial statements.

Page 3 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	(In Thousands, Except Per Share Data)
	(Unaudited)
Net Sales	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Freight and delivery revenues		64,863		54,761		158,707		152,699
Total revenues		665,320		592,268		1,610,555		1,529,643
Cost of sales		457,349		413,485		1,188,923		1,126,532
Freight and delivery costs		64,863		54,761		158,707		152,699
Total cost of revenues		522,212		468,246		1,347,630		1,279,231
Gross Profit		143,108		124,022		262,925		250,412
Selling, general & administrative expenses		37,140		32,095		112,632		100,398
Business development costs		89		-		671		35,140
Other operating (income) and expenses, net		(2,964)		394		(5,535)		(1,070)
Earnings from Operations		108,843		91,533		155,157		115,944
Interest expense		13,518		13,224		40,633		39,967
Other nonoperating expenses and (income), net		101		620		179		(1,277)
Earnings from continuing operations before taxes on income		95,224		77,689		114,345		77,254
Income tax expense		22,915		13,701		29,615		12,484
Earnings from Continuing Operations		72,309		63,988		84,730		64,770
Loss on discontinued operations, net of related tax benefit of $185, $371, $250 and $547, respectively		(271)		(319)		(454)		(967)
Consolidated net earnings		72,038		63,669		84,276		63,803
Less: Net earnings (loss) attributable to noncontrolling interests		202		747		(1,028)		863
Net Earnings Attributable to Martin Marietta Materials, Inc.	$	71,836	$	62,922	$	85,304	$	62,940
Net Earnings Attributable to Martin Marietta Materials, Inc.
Earnings from continuing operations	$	72,107	$	63,241	$	85,758	$	63,907
Loss from discontinued operations		(271)		(319)		(454)		(967)
	$	71,836	$	62,922	$	85,304	$	62,940
Consolidated Comprehensive Earnings (See Note 1)
Earnings attributable to Martin Marietta Materials, Inc.	$	75,384	$	66,082	$	88,763	$	69,350
Earnings (Loss) attributable to noncontrolling interests		205		750		(1,020)		873
	$	75,589	$	66,832	$	87,743	$	70,223
Net Earnings (Loss) Attributable to Martin Marietta Materials, Inc.
Per Common Share
Basic from continuing operations attributable to common shareholders	$	1.56	$	1.37	$	1.85	$	1.39
Discontinued operations attributable to common shareholders		(0.01)		(0.01)		(0.01)		(0.02)
	$	1.55	$	1.36	$	1.84	$	1.37
Diluted from continuing operations attributable to common shareholders	$	1.55	$	1.37	$	1.85	$	1.38
Discontinued operations attributable to common shareholders		(0.01)		(0.01)		(0.01)		(0.02)
	$	1.54	$	1.36	$	1.84	$	1.36
Weighted-Average Common Shares Outstanding
Basic		46,244		45,860		46,134		45,792
Diluted		46,349		45,992		46,261		45,929
Cash Dividends Per Common Share	$	0.40	$	0.40	$	1.20	$	1.20

See accompanying notes to consolidated financial statements.

Page 4 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
	(Unaudited)
Cash Flows from Operating Activities:
Consolidated net earnings	$	84,276	$	63,803
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization		130,097		132,985
Stock-based compensation expense		5,408		5,947
Gains on divestitures and sales of assets		(1,003)		(858)
Deferred income taxes		19,194		11,577
Excess tax benefits from stock-based compensation transactions		(1,990)		-
Other items, net		(739)		2,314
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net		(108,134)		(93,198)
Inventories, net		(14,771)		(12,486)
Accounts payable		27,729		7,077
Other assets and liabilities, net		25,578		4,883
Net Cash Provided by Operating Activities		165,645		122,044
Cash Flows from Investing Activities:
Additions to property, plant and equipment		(102,342)		(105,941)
Acquisitions, net		(64,432)		(132)
Proceeds from divestitures and sales of assets		3,208		7,871
Loan to affiliate		(3,402)		-
Net Cash Used for Investing Activities		(166,968)		(98,202)
Cash Flows from Financing Activities:
Borrowings of long-term debt		355,500		181,000
Repayments of long-term debt		(290,192)		(142,651)
Debt issuance costs		(510)		(300)
Change in bank overdraft		10,437		102
Dividends paid		(55,626)		(55,302)
Distributions to owners of noncontrolling interests		-		(800)
Issuances of common stock		11,571		3,508
Excess tax benefits from stock-based compensation transactions		1,990		-
Net Cash Provided by (Used for) Financing Activities		33,170		(14,443)
Net Increase in Cash and Cash Equivalents		31,847		9,399
Cash and Cash Equivalents, beginning of period		25,394		26,022
Cash and Cash Equivalents, end of period	$	57,241	$	35,421
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	28,621	$	29,255
Cash refunds for income taxes	$	1,432	$	3,170

See accompanying notes to consolidated financial statements.

Page 5 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

CONSOLIDATED STATEMENT OF TOTAL EQUITY

(Unaudited)

(in thousands)	Shares of Common Stock		Common Stock		Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Retained Earnings		Total Shareholders’ Equity		Noncontrolling Interests		Total Equity
Balance at December 31, 2012		46,002	$	459	$	414,657	$	(106,169)	$	1,101,598	$	1,410,545	$	39,754	$	1,450,299
Consolidated net earnings		-		-		-		-		85,304		85,304		(1,028)		84,276
Other comprehensive earnings		-		-		-		3,459		-		3,459		8		3,467
Dividends declared		-		-		-		-		(55,626)		(55,626)		-		(55,626)
Issuances of common stock for stock award plans		246		2		11,057		-		-		11,059		-		11,059
Stock-based compensation expense		-		-		5,408		-		-		5,408		-		5,408
Balance at September 30, 2013		46,248	$	461	$	431,122	$	(102,710)	$	1,131,276	$	1,460,149	$	38,734	$	1,498,883

See accompanying notes to consolidated financial statements.

Page 6 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Significant Accounting Policies

Organization

Martin Marietta Materials, Inc., (the “Corporation”) is engaged principally in the construction aggregates business. The Corporation’s aggregates product line, which accounted for 71% of consolidated 2012 net sales, includes crushed stone, sand and gravel, and is used primarily for construction of highways and other infrastructure projects, and in the nonresidential and residential construction industries. Aggregates products are also used in the railroad, environmental, utility and agricultural industries. These aggregates products, along with the asphalt products, ready mixed concrete and road paving construction services of the Corporation’s vertically-integrated operations (which accounted for 18% of consolidated 2012 net sales), are sold and shipped from a network of 303 quarries, distribution facilities and plants to customers in 33 states, Canada, the Bahamas and the Caribbean Islands. The aggregates and vertically-integrated operations are reported collectively as the Corporation’s “Aggregates business”.

Effective January 1, 2013, the Corporation reorganized the operations and management reporting structure of its Aggregates business, resulting in a change to its reportable segments. The Corporation currently conducts its Aggregates business through three reportable segments as follows:

AGGREGATES BUSINESS
Reportable Segments	Mid-America Group	Southeast Group	West Group
Operating Locations	Indiana, Iowa, Kentucky, Maryland, Minnesota, eastern Nebraska, North Dakota, North Carolina, Ohio, South Carolina, Virginia, Washington and West Virginia	Alabama, Florida, Georgia, Mississippi, Tennessee, Nova Scotia and the Bahamas	Arkansas, Colorado, Kansas, Louisiana, Missouri, western Nebraska, Nevada, Oklahoma, Texas, Utah and Wyoming

In addition to the Aggregates business, the Corporation has a Specialty Products segment, accounting for 11% of consolidated 2012 net sales, which produces magnesia-based chemicals products used in industrial, agricultural and environmental applications and dolomitic lime sold primarily to customers in the steel industry.

Page 7 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Corporation have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and in Article 10 of Regulation S-X. The Corporation has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012, filed with the Securities and Exchange Commission on February 22, 2013. In the opinion of management, the interim consolidated financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of the results of operations, financial position and cash flows for the interim periods. The consolidated results of operations for the three and nine months ended September 30, 2013 are not indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by generally accepted accounting principles for complete financial statements. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012.

Reclassifications

Prior-year segment information for the Aggregates business presented in Note 9 has been reclassified to conform to the presentation of the Corporation’s current reportable segments.

Page 8 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss

Consolidated comprehensive earnings/loss for the Corporation consist of consolidated net earnings or loss; adjustments for the funded status of pension and postretirement benefit plans; foreign currency translation adjustments; and the amortization of the value of terminated forward starting interest rate swap agreements into interest expense.

Comprehensive earnings attributable to Martin Marietta Materials, Inc. are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings attributable to Martin Marietta Materials, Inc.	$	71,836	$	62,922	$	85,304	$	62,940
Other comprehensive earnings, net of tax		3,548		3,160		3,459		6,410
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	$	75,384	$	66,082	$	88,763	$	69,350

Comprehensive earnings (loss) attributable to noncontrolling interests, consisting of net earnings or loss and adjustments for the funded status of pension and postretirement benefit plans, are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings (loss) attributable to noncontrolling interests	$	202	$	747	$	(1,028)	$	863
Other comprehensive earnings, net of tax		3		3		8		10
Comprehensive earnings (loss) attributable to noncontrolling interests	$	205	$	750	$	(1,020)	$	873

Page 9 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss (continued)

Changes in accumulated other comprehensive earnings, net of tax, are as follows:

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Three Months Ended September 30, 2013
Balance at beginning of period	$	(106,603)	$	4,153	$	(3,808)	$	(106,258)
Other comprehensive earnings before reclassifications, net of tax		--		993		--		993
Amounts reclassified from accumulated other comprehensive loss, net of tax		2,387		--		168		2,555
Other comprehensive earnings, net of tax		2,387		993		168		3,548
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Three Months Ended September 30, 2012
Balance at beginning of period	$	(81,407)	$	5,222	$	(4,455)	$	(80,640)
Other comprehensive earnings before reclassifications, net of tax		117		1,435		--		1,552
Amounts reclassified from accumulated other comprehensive loss, net of tax		1,451		--		157		1,608
Other comprehensive earnings, net of tax		1,568		1,435		157		3,160
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Other comprehensive loss before reclassifications for pension and postretirement benefit plans is net of tax of $0 and $77,000 for the three months ended September 30, 2013 and 2012, respectively.

Page 10 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss (continued)

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	(108,189)	$	6,157	$	(4,137)	$	(106,169)
Other comprehensive loss before reclassifications, net of tax		(2,312)		(1,011)		--		(3,323)
Amounts reclassified from accumulated other comprehensive loss, net of tax		6,285		--		497		6,782
Other comprehensive earnings (loss), net of tax		3,973		(1,011)		497		3,459
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Nine Months Ended September 30, 2012
Balance at beginning of period	$	(84,204)	$	5,076	$	(4,762)	$	(83,890)
Other comprehensive (loss) earnings before reclassifications, net of tax		(349)		1,581		--		1,232
Amounts reclassified from accumulated other comprehensive loss, net of tax		4,714		--		464		5,178
Other comprehensive earnings, net of tax		4,365		1,581		464		6,410
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Other comprehensive loss before reclassifications for pension and postretirement benefit plans is net of tax of $1,514,000 and $225,000 for the nine months ended September 30, 2013 and 2012, respectively.

Page 11 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss (continued)

Changes in net noncurrent deferred tax assets recorded in accumulated other comprehensive loss are as follows:

	(Dollars in Thousands)
	Pension and Postretirement Benefit Plans			Unamortized Value of Terminated Forward Starting Interest Rate Swap			Net Noncurrent Deferred Tax Assets
		Three Months Ended September 30, 2013
Balance at beginning of period	$	69,842		$	2,492		$	72,334
Tax effect of other comprehensive earnings		(1,566	)		(111	)		(1,677	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Three Months Ended September 30, 2012
Balance at beginning of period	$	53,328		$	2,915		$	56,243
Tax effect of other comprehensive earnings		(1,026	)		(103	)		(1,129	)
Balance at end of period	$	52,302		$	2,812		$	55,114
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	70,881		$	2,707		$	73,588
Tax effect of other comprehensive earnings		(2,605	)		(326	)		(2,931	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Nine Months Ended September 30, 2012
Balance at beginning of period	$	55,161		$	3,116		$	58,277
Tax effect of other comprehensive earnings		(2,859	)		(304	)		(3,163	)
Balance at end of period	$	52,302		$	2,812		$	55,114

Page 12 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss (continued)

Reclassifications out of accumulated other comprehensive loss are as follows:

	Three Months Ended September  30,						Nine Months Ended September  30,						Affected line items in the consolidated financial statements
	2013			2012			2013			2012
		(Dollars in Thousands)
Pension and postretirement benefit plans
Settlement charge	$	729		$	255		$	729		$	779
Amortization of:
Prior service credit		(702	)		(704	)		(2,104	)		(2,092	)
Actuarial loss		3,926			2,849			11,779			9,111
		3,953			2,400			10,404			7,798		Cost of sales; Selling, general & administrative expenses
Tax effect		(1,566	)		(949	)		(4,119	)		(3,084	)	Deferred income taxes
	$	2,387		$	1,451		$	6,285		$	4,714
Unamortized value of terminated forward starting interest rate swap
Additional interest expense	$	279		$	260		$	823		$	768		Interest expense
Tax effect		(111	)		(103	)		(326	)		(304	)	Deferred income taxes
	$	168		$	157		$	497		$	464

Page 13 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

1. Significant Accounting Policies (continued)

Earnings per Common Share

The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta Materials, Inc., reduced by dividends and undistributed earnings attributable to the Corporation’s unvested restricted stock awards and incentive stock awards. If there is a net loss, no amount of the undistributed loss is attributed to unvested participating securities. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Corporation’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive.

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(In Thousands)
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	72,107	$	63,241	$	85,758	$	63,907
Less: Distributed and undistributed earnings attributable to unvested awards		265		336		374		386
Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		71,842		62,905		85,384		63,521
Basic and diluted net loss available to common shareholders from discontinued operations		(271)		(319)		(454)		(967)
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	71,571	$	62,586	$	84,930	$	62,554
Basic weighted-average common shares outstanding		46,244		45,860		46,134		45,792
Effect of dilutive employee and director awards		105		132		127		137
Diluted weighted-average common shares outstanding		46,349		45,992		46,261		45,929

Page 14 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

2. Business Combinations and Discontinued Operations

Business Combinations

On July 1, 2013, the Corporation acquired three aggregates quarries in the greater Atlanta, Georgia area. This transaction provides over 800 million tons of aggregates reserves and enhances the Corporation’s existing long-term position in this market. The operating results of the acquired locations are reported through the Corporation’s Southeast Group in the financial statements starting from the date of acquisition and the measurement period remains open.

Divestitures and Permanent Closures

Operations that are disposed of or permanently shut down represent discontinued operations, and, therefore, the results of their operations through the dates of disposal and any gain or loss on disposals are included in discontinued operations in the consolidated statements of earnings and comprehensive earnings. The results of operations for divestitures do not include Corporate overhead that was allocated during the periods the Corporation owned these operations. All discontinued operations relate to the Aggregates business.

3. Inventories, Net

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
Finished products	$	366,558	$	355,881	$	356,849
Products in process and raw materials		19,924		16,442		18,918
Supplies and expendable parts		61,441		56,805		56,420
		447,923		429,128		432,187
Less allowances		(97,485)		(96,817)		(97,095)
Total	$	350,438	$	332,311	$	335,092

Page 15 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

4. Long-Term Debt

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
6.6% Senior Notes, due 2018	$	298,837	$	298,677	$	298,626
7% Debentures, due 2025		124,464		124,443		124,437
6.25% Senior Notes, due 2037		228,139		228,114		228,105
Term Loan Facility, due 2015, interest rate of 2.18% at September 30, 2013; 2.21% at December 31, 2012; and 1.87% at September 30, 2012		240,000		245,000		245,000
Revolving Facility, interest rate of 1.88% at September 30, 2013; 1.91% at December 31, 2012; and 1.62% at September 30, 2012		70,000		50,000		100,000
Trade Receivable Facility, interest rate of 0.78% at September 30, 2013		150,000		--		--
AR Credit Facility, interest rate of 1.00% at December 31, 2012 and September 30, 2012		--		100,000		100,000
Other notes		1,921		1,625		2,620
Total debt		1,113,361		1,047,859		1,098,788
Less current maturities		(6,169)		(5,676)		(6,671)
Long-term debt	$	1,107,192	$	1,042,183	$	1,092,117

The Corporation’s $100,000,000 secured accounts receivable credit facility (the “AR Credit Facility”) expired by its own terms on April 20, 2013.

On April 19, 2013, the Corporation, through a wholly-owned consolidated special purpose subsidiary, established a $150,000,000 trade receivable securitization facility with SunTrust Bank and certain other lenders that may become a party to the facility from time to time (the “Trade Receivable Facility”). The Trade Receivable Facility is backed by trade receivables originated by the Corporation, which the Corporation then sells to the wholly-owned consolidated special purpose subsidiary - the balance of which was $314,998,000 at September 30, 2013. Borrowings under the Trade Receivable Facility bear interest at a rate equal to one-month LIBOR plus 0.6% and are limited to the lesser of the facility limit or of “eligible” receivables, as defined. The Corporation continues to be responsible for the servicing and administration of the receivables purchased by the wholly-owned consolidated special purpose subsidiary. The Corporation has the option to request an increase in the commitment amount by up to an additional $100,000,000, in increments of no less than $25,000,000, subject to receipt of lender commitments for the increased amount. The Trade Receivable Facility matures on April 19, 2014. At September 30, 2013, outstanding borrowings under the Trade Receivable Facility were classified as long-term on the consolidated balance sheet as the Corporation has the intent and ability to refinance amounts outstanding. The Trade Receivable Facility contains a cross-default provision to the Corporation’s other debt agreements.

Page 16 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

4. Long-Term Debt (continued)

The Corporation’s Credit Agreement, consisting of a $250,000,000 senior unsecured term loan (the “Term Loan Facility”) and a $350,000,000 senior unsecured revolving facility (the “Revolving Facility”), requires the Corporation’s ratio of consolidated debt to consolidated earnings before interest, taxes, depreciation, depletion and amortization (EBITDA), as defined, for the trailing twelve month period (the “Ratio”) to not exceed 3.50x as of the end of any fiscal quarter, provided that the Corporation may exclude from the Ratio debt incurred in connection with certain acquisitions for a period of 210 days so long as the Corporation maintains specified ratings on its long-term unsecured debt and the Ratio calculated without such exclusion does not exceed 3.75x. Additionally, if no amounts are outstanding under the Revolving Facility, consolidated debt, including debt for which the Corporation is a co-borrower, may be reduced by the Corporation’s unrestricted cash and cash equivalents in excess of $50,000,000, such reduction not to exceed $200,000,000, for purposes of the covenant calculation. The Corporation was in compliance with this Ratio at September 30, 2013.

Available borrowings under the Revolving Facility are reduced by any outstanding letters of credit issued by the Corporation under the Revolving Facility. At September 30, 2013, the Corporation had $2,507,000 of outstanding letters of credit issued under the Revolving Facility.

Accumulated other comprehensive loss includes the unamortized value of terminated forward starting interest rate swap agreements. For the three and nine months ended September 30, 2013, the Corporation recognized $279,000 and $823,000, respectively, as additional interest expense. For the three and nine months ended September 30, 2012, the Corporation recognized $260,000 and $768,000, respectively, as additional interest expense. The ongoing amortization of the terminated value of the forward starting interest rate swap agreements will increase annual interest expense by approximately $1,000,000 until the maturity of the 6.6% Senior Notes in 2018.

Page 17 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

5. Financial Instruments

The Corporation’s financial instruments include temporary cash investments, accounts receivable, notes receivable, bank overdraft, accounts payable, publicly-registered long-term notes, debentures and other long-term debt.

Temporary cash investments are placed primarily in money market funds, money market demand deposit accounts and Eurodollar time deposits with the following financial institutions: Branch Banking and Trust Company, Comerica Bank, Fifth Third Bank, JPMorgan Chase Bank, N.A., Regions Bank, and Wells Fargo Bank, N.A. The Corporation’s cash equivalents have maturities of less than three months. Due to the short maturity of these investments, they are carried on the consolidated balance sheets at cost, which approximates fair value.

Customer receivables are due from a large number of customers, primarily in the construction industry, and are dispersed across wide geographic and economic regions. However, customer receivables are more heavily concentrated in certain states (namely, Texas, North Carolina, Iowa, Colorado and Georgia). The estimated fair values of customer receivables approximate their carrying amounts due to the short-term nature of the receivables.

Notes receivable are primarily promissory notes with customers and are not publicly traded. Management estimates that the fair value of notes receivable approximates the carrying amount.

The bank overdraft represents amounts to be funded to financial institutions for checks that have cleared the bank. The estimated fair value of the bank overdraft approximates its carrying value.

Accounts payable represent amounts owed to suppliers and vendors. The estimated fair value of accounts payable approximates its carrying amounts due to the short-term nature of the payables.

The carrying values and fair values of the Corporation’s long-term debt were $1,113,361,000 and $1,152,906,000, respectively, at September 30, 2013; $1,047,859,000 and $1,105,650,000, respectively, at December 31, 2012; and $1,098,788,000 and $1,156,820,000, respectively, at September 30, 2012. The estimated fair value of the Corporation’s publicly-registered long-term notes was estimated based on level 1 of the fair value hierarchy using quoted market prices. The estimated fair value of other borrowings, which primarily represents variable-rate debt, approximates its carrying amount as the interest rates reset periodically.

Page 18 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

6. Income Taxes

	Nine Months Ended September 30,
	2013		2012
Estimated effective income tax rate:
Continuing operations		25.9%		16.2%
Discontinued operations		35.5%		36.1%
Consolidated overall		25.8%		15.8%

The Corporation’s effective income tax rate reflects the effect of federal and state income taxes and the impact of differences in book and tax accounting arising from the net permanent benefits associated with the statutory depletion deduction for mineral reserves, the impact of foreign losses for which no tax benefit was realized and the domestic production deduction. The effective income tax rates for discontinued operations reflect the tax effects of individual operations’ transactions and are not indicative of the Corporation’s overall effective income tax rate.

On September 13, 2013, the U.S. Treasury Department and Internal Revenue Service issued final regulations addressing costs incurred in acquiring, producing or improving tangible property (the “tangible property regulations”). The tangible property regulations are generally effective for tax years beginning on or after January 1, 2014, and may be adopted in earlier years. The Corporation intends to early adopt the tax treatment of expenditures to improve tangible property and the capitalization of inherently facilitative costs to acquire tangible property as of January 1, 2013. The estimated tax impact of these accounting method changes reduces noncurrent deferred tax assets in the amount of $2,100,000, with a corresponding reduction in current taxes payable, and has been reflected in the consolidated balance sheet as of September 30, 2013. The tangible property regulations will require the Corporation to make additional tax accounting method changes as of January 1, 2014; however, management does not anticipate the impact of these changes to be material to the Corporation’s consolidated financial position and/or results of operations.

The Corporation’s unrecognized tax benefits, excluding interest, correlative effects and indirect benefits, are as follows:

	Nine Months Ended September 30, 2013
		(Dollars in Thousands)
Unrecognized tax benefits at beginning of period		$        15,380
Gross increases – tax positions in prior years		4,520
Gross decreases – tax positions in prior years		(4,336)
Gross increases – tax positions in current year		1,176
Settlements with taxing authorities		(8,599)
Lapse of statute of limitations		(1,691)
Unrecognized tax benefits at end of period		$          6,450

Page 19 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

6. Income Taxes (continued)

In August 2013, the Corporation filed the required amended returns and paid the tax due to settle the Advance Pricing Agreement (“APA”) it has with Canada that increased the sales price charged for intercompany shipments from Canada to the United States during the years 2005 through 2011. The Corporation also filed amended returns in the United States for the years 2005 through 2011 to request the compensating refunds allowed pursuant to the corresponding APA with the United States.

The Corporation anticipates that it is reasonably possible that unrecognized tax benefits may decrease up to $1,828,000 during the twelve months ending September 30, 2014 as a result of the expiration of the statute of limitations for the 2010 tax year.

At September 30, 2013, unrecognized tax benefits of $5,736,000 related to permanent income tax differences, net of federal tax expense, would have favorably affected the Corporation’s effective income tax rate if recognized.

The consolidated overall estimated effective income tax rate for the nine months ended September 30, 2012 included the estimated effects of the APA and a refund of federal tax and interest of $1,626,000 related to the 2006 tax year.

Page 20 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

7. Pension and Postretirement Benefits

The estimated components of the recorded net periodic benefit cost (credit) for pension and postretirement benefits are as follows:

	Three Months Ended September 30,
	Pension						Postretirement Benefits
	2013			2012			2013			2012
		(Dollars in Thousands)
Service cost	$	4,030		$	3,074		$	57		$	57
Interest cost		5,756			5,561			253			309
Expected return on assets		(6,668	)		(5,617	)		--			--
Amortization of:
Prior service cost (credit)		112			110			(814	)		(814	)
Actuarial loss (gain)		3,920			2,920			6			(71	)
Settlement charge		729			255			--			--
Net periodic benefit cost (credit)	$	7,879		$	6,303		$	(498	)	$	(519	)

	Nine Months Ended September 30,
	Pension						Postretirement Benefits
	2013			2012			2013			2012
		(Dollars in Thousands)
Service cost	$	12,091		$	9,813		$	170		$	171
Interest cost		17,268			17,754			760			926
Expected return on assets		(20,003	)		(17,935	)		--			--
Amortization of:
Prior service cost (credit)		337			350			(2,441	)		(2,442	)
Actuarial loss (gain)		11,760			9,323			19			(212	)
Settlement charge		729			779			--			--
Net periodic benefit cost (credit)	$	22,182		$	20,084		$	(1,492	)	$	(1,557	)

Page 21 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

8. Commitments and Contingencies

Legal and Administrative Proceedings

The Corporation is engaged in certain legal and administrative proceedings incidental to its normal business activities. In the opinion of management and counsel, based upon currently-available facts, it is remote that the ultimate outcome of any litigation and other proceedings, including those pertaining to environmental matters, relating to the Corporation and its subsidiaries, will have a material adverse effect on the overall results of the Corporation’s operations, its cash flows or its financial position.

Environmental and Governmental Regulations

The United States Environmental Protection Agency (“USEPA”) includes the lime industry as a national enforcement priority under the federal Clean Air Act (“CAA”). As part of the industry wide effort, the USEPA issued Notices of Violation/Findings of Violation (“NOVs”) to the Corporation in 2010 and 2011 regarding the Corporation’s compliance with the CAA New Source Review (“NSR”) program at its Specialty Products dolomitic lime manufacturing plant in Woodville, Ohio. The Corporation has been providing information to the USEPA in response to these NOVs and has had several meetings with the USEPA. The Corporation believes it is in substantial compliance with the NSR program. Because the enforcement proceeding is in its initial stage, at this time the Corporation cannot reasonably estimate what likely penalties or upgrades to equipment might ultimately be required. The Corporation believes that any costs related to any upgrades to capital equipment will be spread over time and will not have a material adverse effect on the Corporation’s operations or its financial condition, but can give no assurance that the ultimate resolution of this matter will not have a material adverse effect on the financial condition or results of operations of the Specialty Products segment of the business.

Co-Borrower Agreement with an Unconsolidated Affiliate

The Corporation had an unconditional guaranty of payment agreement with Fifth Third Bank (“Fifth Third”) to guarantee the repayment of amounts borrowed by an unconsolidated affiliate under a $24,000,000 revolving line of credit provided by Fifth Third that was replaced in August 2013 by a new $24,000,000 revolving line of credit agreement in which the Corporation became a co-borrower with the affiliate. This new line of credit expires in August 2015. The affiliate has agreed to reimburse and indemnify the Corporation for any payments and expenses the Corporation may incur from this agreement. The Corporation holds a lien on the affiliate’s membership interest in a joint venture as collateral for payment under the revolving line of credit.

Additionally, in September 2013, the Corporation loaned $3,402,000 to this affiliate to repay in full the outstanding balance of its loan with Bank of America, N.A. and entered into a loan agreement with the affiliate for monthly repayment of principal and interest of that loan amount through May 2016. The Corporation holds a lien on the affiliate’s property as collateral for payment under the loan and security agreement.

Page 22 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

9. Business Segments

The Corporation conducts its aggregates and vertically-integrated operations through three reportable business segments: Mid-America Group, Southeast Group and West Group. The Corporation also has a Specialty Products segment that includes magnesia-based chemicals products and dolomitic lime.

The following tables display selected financial data for continuing operations for the Corporation’s reportable business segments. Corporate loss from operations primarily includes depreciation on capitalized interest, expenses for corporate administrative functions, unallocated corporate expenses and other nonrecurring and/or non-operational adjustments. Prior-year segment information has been reclassified to conform to the presentation of the Corporation’s current reportable segments.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Total revenues:
Mid-America Group	$	237,696	$	212,164	$	555,823	$	538,881
Southeast Group		69,491		61,369		185,676		184,448
West Group		297,517		264,662		686,867		640,689
Total Aggregates Business		604,704		538,195		1,428,366		1,364,018
Specialty Products		60,616		54,073		182,189		165,625
Total	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Net sales:
Mid-America Group	$	216,361	$	194,128	$	508,999	$	493,453
Southeast Group		64,871		57,021		171,456		171,027
West Group		263,431		236,911		603,798		560,838
Total Aggregates Business		544,663		488,060		1,284,253		1,225,318
Specialty Products		55,794		49,447		167,595		151,626
Total	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Earnings (Loss) from operations:
Mid-America Group	$	66,419	$	56,357	$	102,342	$	94,959
Southeast Group		(1,386)		(3,452)		(14,949)		(14,980)
West Group		32,302		23,666		38,402		29,183
Total Aggregates Business		97,335		76,571		125,795		109,162
Specialty Products		17,267		17,034		53,071		52,706
Corporate		(5,759)		(2,072)		(23,709)		(45,924)
Total	$	108,843	$	91,533	$	155,157	$	115,944

Page 23 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

9. Business Segments (continued)

Assets employed for the Mid-America and West Groups have been recast since prior year as a result of the Corporation’s reorganization of the operations of its Aggregates business (see Note 1).

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
Assets employed:
Mid-America Group	$	1,161,756	$	1,036,155	$	1,074,451
Southeast Group		628,673		607,705		614,214
West Group		1,172,289		1,147,879		1,188,373
Total Aggregates Business		2,962,718		2,791,739		2,877,038
Specialty Products		153,334		157,673		154,155
Corporate		221,053		211,514		212,011
Total	$	3,337,105	$	3,160,926	$	3,243,204

The Aggregates business includes the aggregates product line, along with the asphalt, ready mixed concrete and road paving product lines of its vertically-integrated operations. All vertically-integrated operations reside in the West Group. The following tables provide net sales and gross profit by product line for the Aggregates business and are reconciled to consolidated net sales and gross profit.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net sales:
Aggregates	$	411,206	$	371,398	$	1,016,238	$	985,563
Asphalt		23,787		28,881		52,231		61,655
Ready Mixed Concrete		41,765		31,531		103,347		78,746
Road Paving		67,905		56,250		112,437		99,354
Total Aggregates Business		544,663		488,060		1,284,253		1,225,318
Specialty Products		55,794		49,447		167,595		151,626
Total	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Gross profit (loss):
Aggregates	$	108,166	$	94,541	$	189,171	$	182,883
Asphalt		7,322		6,359		9,770		9,065
Ready Mixed Concrete		3,124		472		4,911		421
Road Paving		4,286		2,276		(285)		208
Total Aggregates Business		122,898		103,648		203,567		192,577
Specialty Products		19,919		19,744		60,784		59,057
Corporate		291		630		(1,426)		(1,222)
Total	$	143,108	$	124,022	$	262,925	$	250,412

Page 24 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Continued)

10. Supplemental Cash Flow Information

The components of the change in other assets and liabilities, net, are as follows:

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Other current and noncurrent assets	$	(42)	$	(9,694)
Accrued salaries, benefits and payroll taxes		(1,307)		(1,270)
Accrued insurance and other taxes		5,761		7,767
Accrued income taxes		18,369		7,817
Accrued pension, postretirement and postemployment benefits		(10,431)		(14,693)
Other current and noncurrent liabilities		13,228		14,956
	$	25,578	$	4,883

The change in other current and noncurrent assets from 2012 to 2013 is driven by unrecognized tax benefits related to the settlement of the APA described in Note 6 and an increase in sales tax refunds in 2012.

The change in accrued income taxes is driven by an increase in the estimated current tax liability for 2013.

Page 25 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations.

OVERVIEW    Martin Marietta Materials, Inc., (the “Corporation”) is the nation’s second largest producer of construction aggregates. The Corporation’s annual net sales and earnings are predominately derived from its Aggregates business, which processes and sells granite, limestone, and other aggregates products, including asphalt, ready mixed concrete and road paving construction services, from a network of 303 quarries, distribution facilities and plants to customers in 33 states, Canada, the Bahamas and the Caribbean Islands. The Aggregates business’ products are used primarily by commercial customers principally in domestic construction of highways and other infrastructure projects and for nonresidential and residential building development. Aggregates products are also used in the railroad, environmental, utility and agricultural industries.

Effective January 1, 2013, the Corporation reorganized the groups within its Aggregates business. The Corporation currently conducts its aggregates and vertically-integrated operations through three reportable business segments: Mid-America Group, Southeast Group and West Group. The Mid-America Group continues to include operations formerly reported in the Mideast Group, along with operations in Iowa, Minnesota, eastern Nebraska, North Dakota, and Washington (which were formerly reported in the West Group). The Southeast Group remains unchanged. With the exception of operations now reported in the Mid-America Group, there were no other changes to the West Group.

AGGREGATES BUSINESS
Reportable Segments	Mid-America Group	Southeast Group	West Group
Operating Locations	Indiana, Iowa, Kentucky, Maryland, Minnesota, eastern Nebraska, North Dakota, North Carolina, Ohio, South Carolina, Virginia, Washington and West Virginia	Alabama, Florida, Georgia, Mississippi, Tennessee, Nova Scotia and the Bahamas	Arkansas, Colorado, Kansas, Louisiana, Missouri, western Nebraska, Nevada, Oklahoma, Texas, Utah and Wyoming
Primary Product Lines	Aggregates (stone, sand and gravel)	Aggregates (stone, sand and gravel)	Aggregates (stone, sand and gravel), asphalt, ready mixed concrete and road paving
Primary Types of Aggregates Locations	Quarries and Distribution Yards	Quarries and Distribution Yards	Quarries and Distribution Yards
Primary Modes of Transportation for Aggregates Product Line	Truck, Rail and Water	Truck, Rail and Water	Truck and Rail

Page 26 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The Corporation also has a Specialty Products segment that produces magnesia-based chemicals products used in industrial, agricultural and environmental applications and dolomitic lime sold primarily to customers in the steel industry.

CRITICAL ACCOUNTING POLICIES    The Corporation outlined its critical accounting policies in its Annual Report on Form 10-K for the year ended December 31, 2012, filed with the Securities and Exchange Commission (“SEC”) on February 22, 2013. There were no changes to the Corporation’s critical accounting policies during the nine months ended September 30, 2013.

RESULTS OF OPERATIONS

Except as indicated, the following comparative analysis in the Results of Operations section of this Management’s Discussion and Analysis of Financial Condition and Results of Operations reflects results from continuing operations and is based on net sales and cost of sales. However, gross margin as a percentage of net sales and operating margin as a percentage of net sales represent non-GAAP measures. The Corporation presents these ratios calculated based on net sales, as it is consistent with the basis by which management reviews the Corporation’s operating results. Further, management believes it is consistent with the basis by which investors analyze the Corporation’s operating results given that freight and delivery revenues and costs represent pass-throughs and have no profit mark-up. Gross margin and operating margin calculated as percentages of total revenues represent the most directly comparable financial measures calculated in accordance with generally accepted accounting principles (GAAP). The following tables present the calculations of gross margin and operating margin for the three and nine months ended September 30, 2013 and 2012 in accordance with GAAP and reconciliations of the ratios as percentages of total revenues to percentages of net sales:

Gross Margin in Accordance with GAAP

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	(Dollars in Thousands)
Gross profit	$	143,108	$	124,022	$	262,925	$	250,412
Total revenues	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Gross margin		21.5%		20.9%		16.3%		16.4%

Page 27 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Gross Margin Excluding Freight and Delivery Revenues

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	(Dollars in Thousands)
Gross profit	$	143,108	$	124,022	$	262,925	$	250,412
Total revenues	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Less: Freight and delivery revenues		(64,863)		(54,761)		(158,707)		(152,699)
Net sales	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Gross margin excluding freight and delivery revenues		23.8%		23.1%		18.1%		18.2%

Operating Margin in Accordance with GAAP

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	(Dollars in Thousands)
Earnings from operations	$	108,843	$	91,533	$	155,157	$	115,944
Total revenues	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Operating margin		16.4%		15.5%		9.6%		7.6%

Operating Margin Excluding Freight and Delivery Revenues

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	(Dollars in Thousands)
Earnings from operations	$	108,843	$	91,533	$	155,157	$	115,944
Total revenues	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Less: Freight and delivery revenues		(64,863)		(54,761)		(158,707)		(152,699)
Net sales	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Operating margin excluding freight and delivery revenues		18.1%		17.0%		10.7%		8.4%

Page 28 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Quarter Ended September 30

Significant items for the quarter ended September 30, 2013 (unless noted, all comparisons are versus the prior-year third quarter):

— Earnings per diluted share of $1.54 compared with $1.36

— Record consolidated net sales of $600.5 million, up 11.7%, compared with $537.5 million

— Aggregates product line

— Volume up 8.1%

— Pricing up 2.3%

— Production cost per ton up 2.6%

— Consolidated gross profit of $143.1 million

— Gross margin (excluding freight and delivery revenues) expansion of 70 basis points

— Specialty Products record third-quarter

— Net sales of $55.8 million

— Earnings from operations of $17.3 million

— Consolidated selling, general and administrative expenses (“SG&A”) of 6.2%, up 20 basis points as a percentage of net sales

— Consolidated earnings from operations of $108.8 million compared with $91.5 million

— Acquisition and successful integration of three aggregates quarries in the Atlanta, Georgia area

The following table presents net sales, gross profit (loss), selling, general and administrative expenses and earnings (loss) from operations data for the Corporation and its reportable segments for the three months ended September 30, 2013 and 2012. In each case, the data is stated as a percentage of net sales of the Corporation or the relevant segment, as the case may be.

Page 29 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

	Three Months Ended September 30,
	2013				2012
	Amount		% of Net Sales		Amount		% of Net Sales
	(Dollars in Thousands)
Net sales:
Mid-America Group	$	216,361			$	194,128
Southeast Group		64,871				57,021
West Group		263,431				236,911
Total Aggregates Business		544,663		100.0		488,060		100.0
Specialty Products		55,794		100.0		49,447		100.0
Total	$	600,457		100.0	$	537,507		100.0
Gross profit (loss):
Mid-America Group	$	77,030		35.6	$	68,460		35.3
Southeast Group		2,545		3.9		1,070		1.9
West Group		43,323		16.4		34,118		14.4
Total Aggregates Business		122,898		22.6		103,648		21.2
Specialty Products		19,919		35.7		19,744		39.9
Corporate		291		--		630		--
Total	$	143,108		23.8	$	124,022		23.1
Selling, general & administrative expenses:
Mid-America Group	$	12,488			$	12,906
Southeast Group		4,406				4,279
West Group		11,553				11,257
Total Aggregates Business		28,447		5.2		28,442		5.8
Specialty Products		2,582		4.6		2,175		4.4
Corporate		6,111		--		1,478		--
Total	$	37,140		6.2	$	32,095		6.0
Earnings (Loss) from operations:
Mid-America Group	$	66,419			$	56,357
Southeast Group		(1,386)				(3,452)
West Group		32,302				23,666
Total Aggregates Business		97,335		17.9		76,571		15.7
Specialty Products		17,267		30.9		17,034		34.4
Corporate		(5,759)		--		(2,072)		--
Total	$	108,843		18.1	$	91,533		17.0

Page 30 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The Corporation reported double-digit increases in both revenues and earnings in the third quarter of 2013. The Corporation’s performance was driven largely by the ongoing recovery in private sector construction activity, as well as diligent cost management. The combination of a 12% increase in consolidated net sales over the prior-year quarter and ongoing focus on controlling costs resulted in a 13% increase in earnings per diluted share. These results reflect both new third-quarter records for net sales and earnings from operations in the Specialty Products business, as well as volume and pricing growth in the aggregates product line.

Each of the reportable segments in the Aggregates business posted aggregates product line volume growth, led by an 8.1% increase in the Mid-America Group. Consistent with trends noted earlier in the year, private-sector construction generated this growth. The nonresidential market, which comprised 30% of third-quarter aggregates shipments, increased 19% and growth was notable in both commercial construction and the energy sector. The residential market achieved volume growth of 15% and accounted for 13% of quarterly shipments. Housing permits and starts, key indicators for residential construction activity, continued to have strong year-over-year improvement, which should help sustain the recovery in this market. The ChemRock/Rail market, 11% of aggregates volumes, reported higher ballast shipments and increased 13% over the prior-year quarter.

Management is encouraged by significant improvements in the Aggregates business’ markets and believes, as do most third-party forecasters, that significant upside potential remains in both the residential and nonresidential construction segments. Additionally, the Corporation’s Aggregates business will benefit from the current boom in shale gas production as well as planned follow-on development. Management is confident that these trends bode especially well for the business.

Shipments to the infrastructure end-use market, which represented the remaining 46% of the aggregates product line business, were essentially flat with the prior-year quarter. Federal budget and deficit disputes and the uncertainty over future highway funding levels beyond the September 2014 expiration of the Moving Ahead for Progress in the 21^st Century Act, or MAP-21, have contributed to the reluctance of many states and municipalities to commit to large scale projects. Additionally, while awards under the Transportation Infrastructure Finance and Innovation Act (TIFIA) component of MAP-21 have the ability to leverage up to $50 billion in financing for transportation projects of either national or regional significance, they continue to move at a slower pace versus earlier expectations with only two projects being awarded. While management still expects TIFIA to benefit several of the Aggregates business’ major markets - namely Texas, North Carolina and Florida - it does not expect any meaningful impact before the second half of 2014, and more notably in 2015.

Page 31 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Despite federal-level funding delays and concerns, management is encouraged by states’ recognition of the importance of sustained infrastructure investment. The Aggregates business has seen year-over-year growth in highway contract awards and construction employment in several of its key states, including Texas, Georgia, Colorado and Virginia. In Georgia, three regions in the southern part of the state began collecting a special-purpose local option sales tax on January 1, 2013. These monies are earmarked for transportation improvements, and management expects the pace of projects funded by this tax to accelerate as it moves into 2014. Additionally, management anticipates a significant reconstruction effort in Colorado as a result of the recent flooding. The Aggregates business is well-positioned to work with the local Colorado communities to repair and/or replace hundreds of miles of washed-out roads and the significant number of destroyed homes, businesses and bridges.

Pricing momentum in the Aggregates business continued with each of its product lines reporting growth. Importantly, for the third quarter in a row, each reportable segment achieved pricing improvement in the aggregates product line, resulting in an overall increase of 2.3%. The Corporation’s vertically-integrated businesses also achieved pricing growth, with the ready mixed concrete and asphalt product lines reporting increases of 7.0% and 1.6%, respectively.

Net sales by product line for the Aggregates business are as follows:

	Three Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Net sales1:
Aggregates	$	411,206	$	371,398
Asphalt		23,787		28,881
Ready Mixed Concrete		41,765		31,531
Road Paving		67,905		56,250
Total Aggregates Business	$	544,663	$	488,060

¹Net sales by product line reflect the elimination of inter-product line sales.

Page 32 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The following tables present volume and pricing data and shipments data for the aggregates product line.

	Three Months Ended September 30, 2013
Volume/Pricing Variance (1)	Volume		Pricing
Heritage Aggregates Product Line (2):
Mid-America Group		8.1%		2.8%
Southeast Group		4.8%		1.3%
West Group		6.5%		1.7%
Heritage Aggregates Operations(2)		7.0%		2.2%
Aggregates Product Line (3)		8.1%		2.3%

	Three Months Ended September 30,
	2013		2012
	(tons in thousands)
Shipments
Heritage Aggregates Product Line (2):
Mid-America Group		19,172		17,742
Southeast Group		4,612		4,399
West Group		15,468		14,528
Heritage Aggregates Operations(2)		39,252		36,669
Acquisitions		379		--
Divestitures (4)		--		5
Aggregates Product Line (3)		39,631		36,674

	Three Months Ended September 30,
	2013		2012
	(tons in thousands)
Shipments
Aggregates Product Line (3):
Tons to external customers		38,109		35,254
Internal tons used in other product lines		1,522		1,420
Total aggregates tons		39,631		36,674

(1) Volume/pricing variances reflect the percentage increase/(decrease) from the comparable period in the prior year.

(2) Heritage Aggregates Product Line and Heritage Aggregates Operations exclude volume and pricing data for acquisitions that have not been included in prior-year operations for the comparable period and exclude divestitures.

(3) Aggregates Product Line includes all acquisitions from the date of acquisition and divestitures through the date of disposal.

(4) Divestitures include the tons related to divested aggregates product line operations up to the date of divestiture.

Page 33 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The average per-ton selling price for the aggregates product line was $10.55 and $10.32 for the three months ended September 30, 2013 and 2012, respectively.

The Corporation’s vertically-integrated operations include asphalt, ready mixed concrete and road paving businesses in Arkansas, Colorado and Texas. Average selling prices by product line for the Corporation’s vertically-integrated operations are as follows:

	Three Months Ended September 30,
	2013		2012
Asphalt	$	41.76/ton	$	41.11/ton
Ready Mixed Concrete	$	83.44/yd3	$	77.99/yd3

Unit shipments by product line for the Corporation’s vertically-integrated operations are as follows:

	Three Months Ended September 30,
	2013		2012
	(in thousands)
Asphalt Product Line:
Tons to external customers		464		538
Internal tons used in road paving business		761		717
Total asphalt tons		1,225		1,255
Ready Mixed Concrete – cubic yards		496		418

The Aggregates business is significantly affected by erratic weather patterns, seasonal changes and other weather-related conditions. Aggregates production and shipment levels correlate with general construction activity levels, most of which occurs in the spring, summer and fall. Thus, production and shipment levels vary by quarter. Operations concentrated in the northern and midwestern United States generally experience more severe winter weather conditions than operations in the Southeast and Southwest. Excessive rainfall, and conversely excessive drought, can also jeopardize shipments, production and profitability in all markets served by the Corporation. Because of the potentially significant impact of weather on the Corporation’s operations, third-quarter results are not indicative of expected performance for other interim periods or the full year.

Page 34 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The Specialty Products business continued its strong performance, setting third-quarter records for both net sales and earnings from operations. Net sales of $55.8 million increased 12.8%, from growth in the dolomitic lime product line, including the contribution from the Woodville kiln that became operational during the fourth quarter of 2012. While margins (excluding freight and delivery revenues) were negatively affected by higher coal costs and a planned kiln outage for maintenance, the business generated third-quarter record earnings from operations of $17.3 million.

The Corporation leveraged its sales growth into a 70-basis-point expansion of consolidated gross margin (excluding freight and delivery revenues). In fact, each of the Aggregates business’ three reportable segments achieved gross margin improvement, with the Southeast and West Groups each reporting a 200-basis-point expansion. Growth in the Mid-America Group was led by the Mid-Atlantic Division, which once again leveraged an increase in aggregates shipments into an incremental gross margin (excluding freight and delivery revenues) exceeding management’s publicly-stated expectations.

The following presents a reconciliation of consolidated gross profit (dollars in thousands):

Consolidated gross profit, quarter ended September 30, 2012	$	124,022
Aggregates product line:
Volume strength		26,645
Pricing strength		13,163
Cost increases, net		(26,183)
Increase in aggregates product line gross profit		13,625
Vertically-integrated operations		5,625
Specialty Products		175
Corporate		(339)
Increase in consolidated gross profit		19,086
Consolidated gross profit, quarter ended September 30, 2013	$	143,108

Cost increases, net, for the aggregates product line reflect incremental production costs for the recently-acquired quarries in Georgia, higher repair costs, increased workers compensation costs for claims incurred during the quarter, costs related to the September flooding in Denver, Colorado, as well as increased production volume.

Page 35 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Gross profit by business is as follows:

	Three Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Gross profit:
Aggregates	$	108,166	$	94,541
Asphalt		7,322		6,359
Ready Mixed Concrete		3,124		472
Road Paving		4,286		2,276
Total Aggregates Business		122,898		103,648
Specialty Products		19,919		19,744
Corporate		291		630
Total	$	143,108	$	124,022

Consolidated SG&A expenses were 6.2% of net sales, up 20 basis points compared with the prior-year quarter. On an absolute basis, SG&A increased $5.0 million, resulting from higher pension expense, incentive compensation and costs for professional services. The Corporation’s information systems upgrade was successfully completed in October 2013.

Among other items, other operating income and expenses, net, includes gains and losses on the sale of assets; recoveries and writeoffs related to customer accounts receivable; rental, royalty and services income; accretion expense, depreciation expense and gains and losses related to asset retirement obligations; and research and development costs. For the third quarter, consolidated other operating income and expenses, net, was income of $3.0 million in 2013 compared with expense of $0.4 million in 2012. Third quarter 2013 included higher gains on the sale of assets and bad debt recoveries compared with 2012 and a $1.8 million gain for the revision of cost estimates for asset retirement obligations.

Page 36 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Nine Months Ended September 30

Significant items for the nine months ended September 30, 2013 (unless noted, all comparisons are versus the prior-year nine-month period):

— Earnings per diluted share of $1.84 compared with $1.36 (prior-year period includes $0.46 per diluted share charge for business development costs)

— Consolidated net sales of $1.452 billion, up 5.4%, compared with $1.377 million

— Aggregates product line

— Pricing up 2.9%;

— Volume up 0.2%

— Production cost per ton up 2.6%

— Specialty Products net sales of $167.6 million and earnings from operations of $53.1 million

— Consolidated SG&A up 50 basis points as a percentage of net sales

— Consolidated earnings from operations of $155.2 million compared with $115.9 million (prior-year period includes $35.1 million of business development costs)

— Successful integration of three aggregates quarries acquired in the Atlanta, Georgia area

The following table presents net sales, gross profit (loss), selling, general and administrative expenses and earnings (loss) from operations data for the Corporation and its reportable segments for the nine months ended September 30, 2013 and 2012. In each case, the data is stated as a percentage of net sales of the Corporation or the relevant segment, as the case may be.

Page 37 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

	Nine Months Ended September 30,
	2013				2012
	Amount		% of Net Sales		Amount		% of Net Sales
	(Dollars in Thousands)
Net sales:
Mid-America Group	$	508,999			$	493,453
Southeast Group		171,456				171,027
West Group		603,798				560,838
Total Aggregates Business		1,284,253		100.0		1,225,318		100.0
Specialty Products		167,595		100.0		151,626		100.0
Total	$	1,451,848		100.0	$	1,376,944		100.0
Gross profit (loss):
Mid-America Group	$	136,544		26.8	$	131,682		26.7
Southeast Group		(2,911)		(1.7)		348		0.2
West Group		69,934		11.6		60,547		10.8
Total Aggregates Business		203,567		15.9		192,577		15.7
Specialty Products		60,784		36.3		59,057		38.9
Corporate		(1,426)		--		(1,222)		--
Total	$	262,925		18.1	$	250,412		18.2
Selling, general & administrative expenses:
Mid-America Group	$	37,433			$	39,927
Southeast Group		13,375				13,690
West Group		34,481				33,464
Total Aggregates Business		85,289		6.6		87,081		7.1
Specialty Products		7,602		4.5		6,900		4.6
Corporate		19,741		--		6,417		--
Total	$	112,632		7.8	$	100,398		7.3
Earnings (Loss) from operations:
Mid-America Group	$	102,342			$	94,959
Southeast Group		(14,949)				(14,980)
West Group		38,402				29,183
Total Aggregates Business		125,795		9.8		109,162		8.9
Specialty Products		53,071		31.7		52,706		34.8
Corporate		(23,709)		--		(45,924)		--
Total	$	155,157		10.7	$	115,944		8.4

Page 38 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Consolidated net sales increased 5.4% over the comparable 2012 period, driven primarily by pricing improvements for all reportable groups and product lines of the Aggregates business, as well as record net sales achieved by the Specialty Products business.

Pricing momentum in the aggregates product line continued with each reportable group achieving pricing growth. The West Group reported a 3.9% improvement, primarily due to price increases implemented over the past year. The Mid-America and Southeast Groups reported average selling price increases of 2.6% and 2.4%, respectively, for the aggregates product line. The Corporation’s vertically-integrated businesses also achieved pricing growth, with the ready mixed concrete and asphalt product lines reporting increases of 7.9% and 3.1%, respectively.

The aggregates product line experienced year-to-date volume growth of 0.2% driven by positive trends in private-sector construction and related employment. Aggregates shipments to all of the Corporation’s end-use markets increased, with the exception of infrastructure. Infrastructure shipments declined 6.0% resulting from the effects of weather-delayed shipments in the first half of 2013 and lackluster public-sector demand.

Net sales by product line for the Aggregates business are as follows:

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Net sales1:
Aggregates	$	1,016,238	$	985,563
Asphalt		52,231		61,655
Ready Mixed Concrete		103,347		78,746
Road Paving		112,437		99,354
Total Aggregates Business	$	1,284,253	$	1,225,318

¹  Net sales by product line reflect the elimination of inter-product line sales.

Page 39 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The following tables present volume and pricing data and shipments data for the aggregates product line.

	Nine Months Ended September 30, 2013
Volume/Pricing Variance (1)	Volume		Pricing
Heritage Aggregates Product Line (2):
Mid-America Group		0.4%		2.6%
Southeast Group		(4.7%)		2.4%
West Group		0.8%		3.9%
Heritage Aggregates Operations(2)		(0.2%)		2.8%
Aggregates Product Line (3)		0.2%		2.9%

	Nine Months Ended September 30,
	2013		2012
	(tons in thousands)
Shipments
Heritage Aggregates Product Line (2):
Mid-America Group		44,387		44,216
Southeast Group		12,705		13,334
West Group		39,489		39,183
Heritage Aggregates Operations(2)		96,581		96,733
Acquisitions		402		--
Divestitures (4)		3		36
Aggregates Product Line (3)		96,986		96,769

	Nine Months Ended September 30,
	2013		2012
	(tons in thousands)
Shipments
Aggregates Product Line (3):
Tons to external customers		93,516		93,380
Internal tons used in other product lines		3,470		3,389
Total aggregates tons		96,986		96,769

(1) Volume/pricing variances reflect the percentage increase / (decrease) from the comparable period in the prior year.

(2) Heritage Aggregates Product Line and Heritage Aggregates Operations exclude volume and pricing data for acquisitions that have not been included in prior-year operations for the comparable period and exclude divestitures.

(3) Aggregates Product Line includes all acquisitions from the date of acquisition and divestitures through the date of disposal.

(4) Divestitures include the tons related to divested aggregates product line operations up to the date of divestiture.

Page 40 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The per-ton average selling price for the aggregates product line was $10.62 and $10.33 for the nine months ended September 30, 2013 and 2012, respectively.

Average selling prices by product line for the Corporation’s vertically-integrated operations are as follows:

	Nine Months Ended September 30,
	2013			2012
Asphalt	$	42.11/ton		$	40.84/ton
Ready Mixed Concrete	$	82.59/yd	3	$	76.55/yd	3

Unit shipments by product line for the Corporation’s vertically-integrated operations are as follows:

	Nine Months Ended September 30,
	2013		2012
	(in thousands)
Asphalt Product Line:
Tons to external customers		1,072		1,329
Internal tons used in road paving business		1,257		1,203
Total asphalt tons		2,329		2,532
Ready Mixed Concrete – cubic yards		1,261		1,062

For 2013, Specialty Products’ net sales of $167.6 million increased $16.0 million, or 10.5%, over the prior-year period. Sales growth reflects dolomitic lime shipments from the new lime kiln which became operational in November 2012, partially offset by the loss of higher-margin sales from a customer that filed for bankruptcy. While margins (excluding freight and delivery revenues) were negatively affected by higher coal costs and a planned kiln outage for maintenance, the business generated earnings from operations of $53.1 million in 2013. Earnings from operations of $52.7 million in 2012 included a $1.2 million favorable litigation settlement.

Consolidated gross margin (excluding freight and delivery revenues) was 18.1% for 2013 versus 18.2% for 2012 and was negatively impacted by higher repair costs, including $1.7 million in costs associated with unplanned repairs for a shiploader/reclaimer for the Southeast Group, incremental production costs for the recently-acquired quarries in Georgia, increased workers compensation costs for incurred claims and costs related to the September flooding in Denver, Colorado.

Page 41 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The following presents a reconciliation of consolidated gross profit (dollars in thousands):

Consolidated gross profit, nine months ended September 30, 2012	$	250,412
Aggregates product line:
Pricing strength		28,370
Volume strength		2,305
Cost increases, net		(24,387)
Increase in aggregates product line gross profit		6,288
Vertically-integrated operations		4,702
Specialty Products		1,727
Corporate		(204)
Increase in consolidated gross profit		12,513
Consolidated gross profit, nine months ended September 30, 2013	$	262,925

Gross profit (loss) by business is as follows:

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Gross profit (loss):
Aggregates	$	189,171	$	182,883
Asphalt		9,770		9,065
Ready Mixed Concrete		4,911		421
Road Paving		(285)		208
Total Aggregates Business		203,567		192,577
Specialty Products		60,784		59,057
Corporate		(1,426)		(1,222)
Total	$	262,925	$	250,412

Consolidated SG&A expenses were 7.8% of net sales, up 50 basis points compared with the prior-year period. On an absolute basis, SG&A increased $12.2 million, due to incremental costs for the Corporation’s information systems upgrade that was successfully completed in October 2013 and increased professional services.

During the nine months ended September 30, 2012, the Corporation incurred $35.1 million of business development costs related to a proposed significant business combination that was not consummated.

Page 42 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

For the first nine months, consolidated other operating income and expenses, net, was income of $5.5 million in 2013 compared with income of $1.1 million in 2012, due in part to higher bad debt recoveries in 2013 and a $1.8 million gain for the revision of cost estimates for asset retirement obligations in 2013.

In addition to other offsetting amounts, other nonoperating income and expenses, net, are comprised generally of interest income and net equity earnings from nonconsolidated investments. Consolidated other nonoperating income and expenses, net, for the nine months ended September 30 was an expense of $0.2 million in 2013 compared with income of $1.3 million in 2012. Nonoperating income for 2012 included a gain on debt repurchased at a discount and a gain on foreign currency transactions (compared with a loss in 2013), which were partially offset by lower earnings on nonconsolidated equity investments.

LIQUIDITY AND CAPITAL RESOURCES

Cash provided by operating activities for the nine months ended September 30, 2013 was $165.6 million compared with $122.0 million for the same period in 2012. The improvement is attributable to the absence of significant business development costs incurred in 2012 and a larger increase in payables. Operating cash flow is primarily derived from consolidated net earnings, before deducting depreciation, depletion and amortization, and offset by working capital requirements. Depreciation, depletion and amortization were as follows:

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Depreciation	$	122,129	$	125,534
Depletion		3,920		3,446
Amortization		4,048		4,005
	$	130,097	$	132,985

The seasonal nature of the construction aggregates business impacts quarterly operating cash flow when compared with the full year. Full-year 2012 net cash provided by operating activities was $222.7 million compared with $122.0 million for the first nine months of 2012.

During the nine months ended September 30, 2013, the Corporation invested $102.3 million of capital into its business. Full-year capital spending, exclusive of acquisitions, if any, is expected to be approximately $155.0 million in 2013. Comparable full-year capital expenditures were $151.0 million in 2012.

During the third quarter of 2013, the Corporation acquired three aggregates quarries in Atlanta, Georgia.

Page 43 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

On April 19, 2013, the Corporation, through a wholly-owned consolidated special purpose subsidiary, established a $150 million trade receivable securitization facility with SunTrust Bank and certain other lenders that may become a party to the facility from time to time (the “Trade Receivable Facility”). Borrowings under the Trade Receivable Facility are limited based on the balance of the Corporation’s accounts receivable and bear interest at a rate equal to the one-month LIBOR plus 0.6%. The Corporation has the option to request an increase in the commitment amount by up to an additional $100 million in increments of no less than $25 million, subject to receipt of lender commitments for the increased amount. The Corporation has the intent and ability to refinance amounts outstanding when the Trade Receivable Facility matures on April 19, 2014.

The Corporation can repurchase its common stock through open-market purchases pursuant to authority granted by its Board of Directors. The Corporation did not repurchase any shares of common stock during the nine months ended September 30, 2013 and 2012. Management currently has no intent to repurchase any shares of the Corporation’s common stock. At September 30, 2013, 5,042,000 shares of common stock were remaining under the Corporation’s repurchase authorization.

The Credit Agreement (which consisted of a $250 million Term Loan Facility and a $350 million Revolving Facility at September 30, 2013) requires the Corporation’s ratio of consolidated debt to consolidated earnings before interest, taxes, depreciation, depletion and amortization (EBITDA), as defined, for the trailing twelve month period (the “Ratio”) to not exceed 3.50x as of the end of any fiscal quarter, provided that the Corporation may exclude from the Ratio debt incurred in connection with certain acquisitions for a period of 210 days so long as the Corporation, as a consequence of such specified acquisition, does not have its ratings on long-term unsecured debt fall below BBB by Standard & Poor’s or Baa2 by Moody’s and the Ratio calculated without such exclusion does not exceed 3.75x. Additionally, if there are no amounts outstanding under the Revolving Facility, consolidated debt, including debt for which the Corporation is a co-borrower, will be reduced for purposes of the covenant calculation by the Corporation’s unrestricted cash and cash equivalents in excess of $50 million, such reduction not to exceed $200 million.

The Ratio is calculated as debt, including debt for which the Corporation is a co-borrower, divided by consolidated EBITDA, as defined, for the trailing twelve months. Consolidated EBITDA is generally defined as earnings before interest expense, income tax expense, and depreciation, depletion and amortization expense for continuing operations. Additionally, stock-based compensation expense is added back and interest income is deducted in the calculation of consolidated EBITDA. Certain other nonrecurring noncash items, if they occur, can affect the calculation of consolidated EBITDA.

Page 44 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

At September 30, 2013, the Corporation’s ratio of consolidated debt to consolidated EBITDA, as defined, for the trailing twelve months EBITDA was 3.06 times and was calculated as follows:

	Twelve Month Period October 1, 2012 to September 30, 2013
	(Dollars in thousands)
Earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	106,761
Add back:
Interest expense		54,005
Income tax expense		33,949
Depreciation, depletion and amortization expense		169,579
Stock-based compensation expense		7,242
Deduct:
Interest income		(301)
Consolidated EBITDA, as defined	$	371,235
Consolidated debt, including debt for which the Corporation is a co-borrower, at September 30, 2013	$	1,135,327
Deduct:
Unrestricted cash and cash equivalents in excess of $50,000 at September 30, 2013		--
Consolidated net debt, as defined, at September 30, 2013	$	1,135,327
Consolidated debt to consolidated EBITDA, as defined, at September 30, 2013 for the trailing twelve months EBITDA		3.06X

The Trade Receivable Facility contains a cross-default provision to the Corporation’s other debt agreements. In the event of a default on the Ratio, the lenders can terminate the Credit Agreement and Trade Receivable Facility and declare any outstanding balances as immediately due.

Cash on hand, along with the Corporation’s projected internal cash flows and availability of financing resources, including its access to debt and equity capital markets, is expected to continue to be sufficient to provide the capital resources necessary to support anticipated operating needs, cover debt service requirements, meet capital expenditures and discretionary investment needs, fund certain acquisition opportunities that may arise and allow for payment of dividends for the foreseeable future. At September 30, 2013, the Corporation had $277 million of unused borrowing capacity under its Revolving Facility, subject to complying with the related leverage covenant.

Page 45 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

The Corporation may be required to obtain financing to fund certain strategic acquisitions, if any such opportunities arise, or to refinance outstanding debt. Any strategic acquisition of size for cash would likely require an appropriate balance of newly-issued equity with debt in order to maintain a composite investment-grade credit rating. Furthermore, the Corporation is exposed to the credit markets, through the interest cost related to its variable-rate debt, which included borrowings under its Revolving Facility, Term Loan Facility and Trade Receivable Facility at September 30, 2013. The Corporation is currently rated by three credit rating agencies; two of those agencies’ credit ratings are investment-grade level and the third agency’s credit rating is one level below investment grade. The Corporation’s composite credit rating remains at investment-grade level, which facilitates obtaining financing at lower rates than noninvestment-grade ratings. While management believes its composite credit ratings will remain at an investment-grade level, no assurance can be given that these ratings will remain at current levels, particularly if any opportunities arise to consummate strategic acquisitions.

TRENDS AND RISKS     The Corporation outlined the risks associated with its business in its Annual Report on Form 10-K for the year ended December 31, 2012, filed with the Securities and Exchange Commission on February 22, 2013. Management continues to evaluate its exposure to all operating risks on an ongoing basis.

OUTLOOK

As noted above, management is encouraged by various positive trends in the Corporation’s business and markets – especially in private-sector employment and construction. Management anticipates volumes in the nonresidential end-use market to increase in the mid-single digits given that the Architecture Billings Index, or ABI, a leading economic indicator for nonresidential construction spending activity, remains at a strong level and has shown consistent growth over the last year. Residential construction is experiencing a level of growth not seen since late 2005 with seasonally-adjusted starts ahead of any period since 2008. Management believes this trend in housing starts will continue and the residential end-use market will experience high single-digit volume growth. By contrast, the weather-related slowdown in aggregates shipments experienced in the first half of the year, coupled with the hesitancy created by the uncertainty of future federal highway funding levels, leads management to expect aggregates shipments to the infrastructure end-use market to be down in the mid-single digits for the full year. The ChemRock/Rail end-use market is expected to be flat compared with 2012. 

Cumulatively, dependent on fourth-quarter weather, management anticipates full-year aggregates product line shipments will be flat to slightly up as compared with 2012 levels. Management currently expects aggregates product line pricing to increase 2% to 4% for the full year. A variety of factors beyond the Corporation’s direct control may continue to exert pressure on volumes, and forecasted pricing increase will not be uniform across the company.

Page 46 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

Management expects the vertically-integrated businesses to generate between $335 million and $355 million of net sales and $18 million to $20 million of gross profit.

Aggregates product line direct production costs per ton should be up slightly compared with 2012. SG&A expenses, excluding costs in 2013 and 2012 related to the information systems upgrade, as a percentage of net sales are expected to remain relatively flat.

Net sales for the Specialty Products segment are expected to be between $220 million and $230 million, generating $81 million to $85 million of gross profit. Steel utilization and natural gas prices are two key factors for this segment.

Interest expense is expected to remain relatively flat compared with 2012. The Corporation’s effective tax rate is expected to approximate 26%, excluding discrete events. Capital expenditures are forecast at $155 million.

Management has started framing a preliminary 2014 outlook for the Aggregates business’ end-use markets and, while the current environment in Washington, DC reduces clarity, it has formed an initial view based on internal observations in conjunction with McGraw Hill Construction’s recent economic forecast. Management currently expects shipments to the infrastructure end-use market to increase slightly. Management anticipates the nonresidential end-use market to increase in the mid-to-high single digits, led by strength in the commercial component and energy sector. Management believes the recent positive trend in housing starts will continue and the residential end-use market will experience double-digit volume growth. Finally, management expects the ChemRock/Rail end-use market to be up low single digits compared with 2013.

The full-year 2013 and preliminary 2014 outlook include management’s assessment of the likelihood of certain risk factors that will affect performance. The most significant risk to the Corporation’s performance will be the United States economy and its impact on construction activity. While transportation investment is mostly exempt from spending cuts, the impact of sequester may may increase in future periods. While both MAP-21 and TIFIA credit assistance are excluded from the federal budget sequester and the U.S. debt ceiling limit, the ultimate resolution of these issues may have a significant impact on the economy and, consequently, construction activity. In addition, the recent government shutdown may further erode consumer confidence, which may negatively impact investment in construction projects. Other risks related to the Corporation’s future performance include, but are not limited to, both price and volume and include a recurrence of widespread decline in aggregates volume negatively affecting aggregates price; the termination, capping and/or reduction of the federal and/or state gasoline tax(es) or other revenue related to infrastructure construction; a significant change in the funding patterns for traditional federal, state and/or local infrastructure projects; a reduction in defense spending, and the subsequent impact on construction activity on or near military bases; a decline in nonresidential construction, a decline in

Page 47 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

energy-related drilling activity resulting from certain regulatory or economic factors, a slowdown in the residential construction recovery, or some combination thereof; and a reduction in ChemRock/Rail shipments resulting from the uncertainty as to the timing and funding of the domestic farm bill and declining coal traffic on the railroads. Further, increased highway construction funding pressures resulting from either federal or state issues can affect profitability. If these negatively affect transportation budgets more than in the past, construction spending could be reduced. North Carolina, a state that disproportionately affects the Corporation’s revenue and profitability, is among the states experiencing these fiscal pressures, although recent statistics indicate that transportation and tax revenues are increasing. The Specialty Products business essentially runs at capacity; therefore any unplanned changes in costs or customers introduce volatility to the earnings of this segment.

The Corporation’s principal business serves customers in aggregates-related construction markets. This concentration could increase the risk of potential losses on customer receivables; however, payment bonds normally posted on public projects, together with lien rights on private projects, help to mitigate the risk of uncollectible receivables. The level of aggregates demand in the Corporation’s end-use markets, production levels and the management of production costs will affect the operating leverage of the Aggregates business and, therefore, profitability. Production costs in the Aggregates business are also sensitive to energy and raw materials prices, both directly and indirectly. Diesel fuel and other consumables change production costs directly through consumption or indirectly by increased energy-related input costs, such as, steel, explosives, tires and conveyor belts. Fluctuating diesel fuel pricing also affects transportation costs, primarily through fuel surcharges in the Corporation’s long-haul distribution network. The Specialty Products business is sensitive to changes in domestic steel capacity utilization and the absolute price and fluctuations in the cost of natural gas.

Transportation in the Corporation’s long-haul network, particularly rail cars and locomotive power to move trains, affects its ability to efficiently transport material into certain markets, most notably Texas, Florida and the Gulf Coast. The availability of trucks and drivers to transport the Corporation’s product, particularly in markets experiencing increased demand due to energy sector activity, is also a risk. The Aggregates business is also subject to weather-related risks that can significantly affect production schedules and profitability. The first and fourth quarters are most adversely affected by winter weather. Hurricane activity in the Atlantic Ocean and Gulf Coast generally is most active during the third and fourth quarters.

Risks to the outlook include shipment declines as a result of economic events beyond the Corporation’s control. In addition to the impact on nonresidential and residential construction, the Corporation is exposed to risk in its estimated outlook from credit markets and the availability of and interest cost related to its debt.

The Corporation’s future performance is also exposed to risk from tax reform at the federal and state levels.

Page 48 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

OTHER MATTERS     If you are interested in Martin Marietta Materials, Inc. stock, management recommends that, at a minimum, you read the Corporation’s current Annual Report and Forms 10-K, 10-Q and 8-K reports to the SEC over the past year. The Corporation’s recent proxy statement for the annual meeting of shareholders also contains important information. These and other materials that have been filed with the SEC are accessible through the Corporation’s website at www.martinmarietta.com and are also available at the SEC’s website at www.sec.gov. You may also write or call the Corporation’s Corporate Secretary, who will provide copies of such reports.

Investors are cautioned that all statements in this Quarterly Report that relate to the future involve risks and uncertainties, and are based on assumptions that the Corporation believes in good faith are reasonable but which may be materially different from actual results. Forward-looking statements give the investor the Corporation’s expectations or forecasts of future events. You can identify these statements by the fact that they do not relate only to historical or current facts. They may use words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” and other words of similar meaning in connection with future events or future operating or financial performance. Any or all of the Corporation’s forward-looking statements here and in other publications may turn out to be wrong.

Factors that the Corporation currently believes could cause actual results to differ materially from the forward-looking statements in this Quarterly Report on Form 10-Q include, but are not limited to, the performance of the United States economy and the resolution and impact of the debt ceiling and sequestration issues; widespread decline in aggregates pricing; the termination, capping and/or reduction of the federal and/or state gasoline tax(es) or other revenue related to infrastructure construction; the level and timing of federal and state transportation funding, including federal stimulus projects and most particularly in North Carolina and Texas, two of the Corporation’s largest and most profitable states, and Iowa, Colorado and Georgia, which when coupled with North Carolina and Texas, represented 57% of 2012 net sales of the Aggregates business; the ability of states and/or other entities to finance approved projects either with tax revenues or alternative financing structures; levels of construction spending in the markets the Corporation serves; a decline in defense spending, and the subsequent impact on construction activity on or near military bases; a decline in the commercial component of the nonresidential construction market, notably office and retail space; a slowdown in energy-related drilling activity; a slowdown in residential construction recovery; a reduction in shipments due to decline in funding under the domestic farm bill; unfavorable weather conditions, particularly Atlantic Ocean hurricane activity, the late start to spring or the early onset of winter and the impact of a drought or excessive rainfall in the markets served by the Corporation; the volatility of fuel costs, particularly diesel fuel, and the impact on the cost of other consumables, namely steel, explosives, tires, conveyor belts, and with respect to the Specialty Products segment, natural gas; continued increases in the cost of other repair and supply parts; transportation availability, notably the availability of railcars and locomotive power to move trains to supply the Corporation’s Texas, Florida and Gulf Coast markets; increased transportation costs, including increases from higher passed-through energy and other costs to comply with tightening

Page 49 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Third Quarter Ended September 30, 2013

(Continued)

regulations as well as higher volumes of rail and water shipments; availability and cost of construction equipment in the United States; weakening in the steel industry markets served by the Corporation’s dolomitic lime products; inflation and its effect on both production and interest costs; reduction of the Corporation’s credit rating to noninvestment-grade resulting from strategic acquisitions; ability to successfully integrate acquisitions quickly and in a cost-effective manner and achieve anticipated profitability to maintain compliance with the Corporation’s leverage ratio debt covenant; changes in tax laws, the interpretation of such laws and/or administrative practices that would increase the Corporation’s tax rate; violation of the Corporation’s debt covenant if price and/or volumes returns to previous levels of instability; downward pressure on the Corporation’s common stock price and its impact on goodwill impairment evaluations; and other risk factors listed from time to time found in the Corporation’s filings with the SEC.

Other factors besides those listed here may also adversely affect the Corporation, and may be material to the Corporation. The Corporation assumes no obligation to update any such forward-looking statements.

INVESTOR ACCESS TO COMPANY FILINGS     Shareholders may obtain, without charge, a copy of Martin Marietta Materials, Inc.’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission for the fiscal year ended December 31, 2012, by writing to:

Martin Marietta Materials, Inc.

Attn: Corporate Secretary

2710 Wycliff Road

Raleigh, North Carolina 27607-3033

Additionally, Martin Marietta Materials, Inc.’s Annual Report, press releases and filings with the Securities and Exchange Commission, including Forms 10-K, 10-Q, 8-K and 11-K, can generally be accessed via the Corporation’s website. Filings with the Securities and Exchange Commission accessed via the website are available through a link with the Electronic Data Gathering, Analysis, and Retrieval (“EDGAR”) system. Accordingly, access to such filings is available upon EDGAR placing the related document in its database. Investor relations contact information is as follows:

Telephone: (919) 788-4367

Website address: www.martinmarietta.com

Information included on the Corporation’s website is not incorporated into, or otherwise create a part of, this report.

Page 50 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

The Corporation’s operations are highly dependent upon the interest rate-sensitive construction and steelmaking industries. Consequently, these marketplaces could experience lower levels of economic activity in an environment of rising interest rates or escalating costs.

Management has considered the current economic environment and its potential impact to the Corporation’s business. Demand for aggregates products, particularly in the nonresidential and residential construction markets, could decline if companies and consumers are unable to obtain financing for construction projects or if economic uncertainty causes delays or cancellations to capital projects. Additionally, declining tax revenues and state budget deficits have negatively affected states’ abilities to finance infrastructure construction projects.

Demand in the residential construction market is affected by interest rates. The Federal Reserve kept the federal funds rate near zero percent during the nine months ended September 30, 2013. The residential construction market accounted for 13% of the Corporation’s aggregates product line shipments for the nine months ended September 30, 2013.

Aside from these inherent risks from within its operations, the Corporation’s earnings are affected also by changes in short-term interest rates as a result of any temporary cash investments, including money market funds and Eurodollar time deposit accounts; any outstanding variable-rate borrowing facilities; and defined benefit pension plans. Additionally, the Corporation’s earnings are affected by energy costs. The Corporation has no material counterparty risk or foreign currency risk.

Variable-Rate Borrowing Facilities.    At September 30, 2013, the Corporation had a $600 million Credit Agreement, comprised of a $350 million Revolving Facility and $250 million Term Loan Facility, and a Trade Receivable Facility. Borrowings under these facilities bear interest at a variable interest rate. A hypothetical 100-basis-point increase in interest rates on borrowings of $460.0 million, which was the collective outstanding balance at September 30, 2013, would increase interest expense by $4.6 million on an annual basis.

Pension Expense.    The Corporation’s results of operations are affected by its pension expense. Assumptions that affect pension expense include the discount rate and, for the defined benefit pension plans only, the expected long-term rate of return on assets. Therefore, the Corporation has interest rate risk associated with these factors. The impact of hypothetical changes in these assumptions on the Corporation’s annual pension expense is discussed in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012, filed with the Securities and Exchange Commission on February 22, 2013.

Page 51 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

Energy Costs.    Energy costs, including diesel fuel and natural gas, represent significant production costs for the Corporation. The Corporation’s Specialty Products business has fixed price agreements for the supply of coal and approximately 25% of its natural gas needs in 2013. A hypothetical 10% change in the Corporation’s energy prices in 2013 as compared with 2012, assuming constant volumes, would impact annual 2013 pretax earnings by approximately $18.8 million.

Aggregate Risk for Interest Rates and Energy Costs.    Pension expense for 2013 is calculated based on assumptions selected at December 31, 2012. Therefore, interest rate risk in 2013 is limited to the potential effect related to the Corporation’s borrowings under variable-rate facilities. The effect of a hypothetical increase in interest rates of 1% on $460.0 million of variable-rate borrowings outstanding at September 30, 2013 would increase interest expense on an annual basis by $4.6 million. Additionally, a 10% change in energy costs would impact annual pretax earnings by $18.8 million.

Item 4.  Controls and Procedures

As of September 30, 2013, an evaluation was performed under the supervision and with the participation of the Corporation’s management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and the operation of the Corporation’s disclosure controls and procedures. Based on that evaluation, the Corporation’s management, including the Chief Executive Officer and Chief Financial Officer, concluded that the Corporation’s disclosure controls and procedures were effective as of September 30, 2013. There were no changes in the Corporation’s internal control over financial reporting during the most recently completed fiscal quarter that materially affected, or are reasonably likely to materially affect, the Corporation’s internal control over financial reporting.

Page 52 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

PART II-OTHER INFORMATION

Item 1.  Legal Proceedings.

Reference is made to Part I. Item 3. Legal Proceedings of the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the year ended December 31, 2012.

Item 1A.  Risk Factors.

Reference is made to Part I. Item 1A. Risk Factors and Forward-Looking Statements of the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the year ended December 31, 2012.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds.

ISSUER PURCHASES OF EQUITY SECURITIES

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly  Announced Plans or Programs		Maximum Number of Shares that May Yet be Purchased Under the  Plans or Programs
July 1, 2013 – July 31, 2013		--	$	--		--	5,041,871
August 1, 2013 – August 31, 2013		--	$	--		--	5,041,871
September 1, 2013 – September 30, 2013		--	$	--		--	5,041,871
Total		--	$	--		--	5,041,871

The Corporation’s initial stock repurchase program, which authorized the repurchase of 2.5 million shares of common stock, was announced in a press release dated May 6, 1994, and has been updated as appropriate. The program does not have an expiration date.

Item 4.  Mine Safety Disclosures.

The information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K (17 CFR 229.104) is included in Exhibit 95 to this Quarterly Report on Form 10-Q.

Page 53 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

PART II-OTHER INFORMATION

(Continued)

Item 6.  Exhibits.

Exhibit   No.	Document
31.01	Certification dated November 7, 2013 of Chief Executive Officer pursuant to Securities and Exchange Act of 1934 rule 13a-14 as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.02	Certification dated November 7, 2013 of Chief Financial Officer pursuant to Securities and Exchange Act of 1934 rule 13a-14 as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.01	Written Statement dated November 7, 2013 of Chief Executive Officer required by 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.02	Written Statement dated November 7, 2013 of Chief Financial Officer required by 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
95	Mine Safety Disclosures
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase

Page 54 of 56

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		MARTIN MARIETTA MATERIALS, INC.
		(Registrant)
Date: November 7, 2013	By:	/s/ Anne H. Lloyd
		Anne H. Lloyd
		Executive Vice President and
		Chief Financial Officer

Page 55 of 56

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

FORM 10-Q

For the Quarter Ended September 30, 2013

EXHIBIT INDEX

Exhibit   No.	Document
31.01	Certification dated November 7, 2013 of Chief Executive Officer pursuant to Securities and Exchange Act of 1934 rule 13a-14 as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.02	Certification dated November 7, 2013 of Chief Financial Officer pursuant to Securities and Exchange Act of 1934 rule 13a-14 as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.01	Written Statement dated November 7, 2013 of Chief Executive Officer required by 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.02	Written Statement dated November 7, 2013 of Chief Financial Officer required by 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
95	Mine Safety Disclosures
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase

Page 56 of 56

EX-31.01

EXHIBIT 31.01

CERTIFICATION PURSUANT TO SECURITIES AND EXCHANGE ACT OF 1934

RULE 13a-14 AS ADOPTED PURSUANT TO SECTION 302 OF SARBANES-OXLEY

ACT OF 2002

I, C. Howard Nye, certify that:

1. I have reviewed this Form 10-Q of Martin Marietta Materials, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 7, 2013	By:	/s/ C. Howard Nye
		C. Howard Nye
		President and Chief Executive Officer

EX-31.02

EXHIBIT 31.02

CERTIFICATION PURSUANT TO SECURITIES AND EXCHANGE ACT OF 1934

RULE 13a-14 AS ADOPTED PURSUANT TO SECTION 302 OF SARBANES-OXLEY

ACT OF 2002

I, Anne H. Lloyd, certify that:

1. I have reviewed this Form 10-Q of Martin Marietta Materials, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 7, 2013	By:	/s/ Anne H. Lloyd
		Anne H. Lloyd
		Executive Vice President and Chief Financial Officer

EX-32.01

EXHIBIT 32.01

Written Statement Pursuant to 18 U.S.C. 1350,

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q for the period ended September 30, 2013 (the “Report”) of Martin Marietta Materials, Inc. (the “Registrant”), as filed with the Securities and Exchange Commission on the date hereof, I, C. Howard Nye, the Chief Executive Officer of the Registrant, certify, to the best of my knowledge, that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ C. Howard Nye

C. Howard Nye

Chief Executive Officer

Dated: November 7, 2013

A signed original of this written statement required by Section 906 has been provided to Martin Marietta Materials, Inc. and will be retained by Martin Marietta Materials, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.02

EXHIBIT 32.02

Written Statement Pursuant to 18 U.S.C. 1350,

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q for the period ended September 30, 2013 (the “Report”) of Martin Marietta Materials, Inc. (the “Registrant”), as filed with the Securities and Exchange Commission on the date hereof, I, Anne H. Lloyd, the Chief Financial Officer of the Registrant, certify, to the best of my knowledge, that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ Anne H. Lloyd

Anne H. Lloyd

Executive Vice President and

Chief Financial Officer

Dated: November 7, 2013

A signed original of this written statement required by Section 906 has been provided to Martin Marietta Materials, Inc. and will be retained by Martin Marietta Materials, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-95

EXHIBIT 95

MINE SAFETY DISCLOSURES

The operation of the Corporation’s domestic aggregates quarries and mines is subject to regulation by the federal Mine Safety and Health Administration (MSHA) under the Federal Mine Safety and Health Act of 1977 (the “Mine Act”). MSHA inspects the Corporation’s quarries and mines on a regular basis and issues various citations and orders when it believes a violation has occurred under the Mine Act. Whenever MSHA issues a citation or order, it also generally proposes a civil penalty, or fine, related to the alleged violation. Citations or orders may be contested and appealed, and as part of that process, are often reduced in severity and amount, and are sometimes dismissed.

Under the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), the Corporation is required to present information regarding certain mining safety and health citations which MSHA has issued with respect to its aggregates mining operations in its periodic reports filed with the Securities and Exchange Commission (SEC). In evaluating this information, consideration should be given to factors such as: (i) the number of citations and orders will vary depending on the size of the quarry or mine and types of operations (underground or surface), (ii) the number of citations issued will vary from inspector to inspector and location to location, and (iii) citations and orders can be contested and appealed, and in that process, may be reduced in severity and amount, and are sometimes dismissed.

The Corporation has provided the information below in response to the SEC’s rules and regulations issued under the provisions of the Dodd-Frank Act. The disclosures reflect U.S. mining operations only, as the requirements of the Dodd-Frank Act and the SEC rules and regulations thereunder do not apply to the Corporation’s quarries and mines operated outside the United States.

The Corporation presents the following items regarding certain mining safety and health matters for the three months ended September 30, 2013:

• Total number of violations of mandatory health or safety standards that could significantly and substantially contribute to the cause and effect of a mine safety or health hazard under section 104 of the Mine Act for which the Corporation has received a citation from MSHA (hereinafter, “Section 104 S&S Citations”). If MSHA determines that a violation of a mandatory health or safety standard is likely to result in a reasonably serious injury or illness under the unique circumstance contributed to by the violation, MSHA will classify the violation as a “significant and substantial” violation (commonly referred to as a “S&S” violation). MSHA inspectors will classify each citation or order written as a “S&S” violation or not.

• Total number of orders issued under section 104(b) of the Mine Act (hereinafter, “Section 104(b) Orders”). These orders are issued for situations in which MSHA determines a previous violation covered by a Section 104(a) citation has not been totally abated within the prescribed time period, so a further order is needed to require the mine operator to immediately withdraw all persons (except authorized persons) from the affected area of a quarry or mine.

• Total number of citations and orders for unwarrantable failure of the mine operator to comply with mandatory health or safety standards under Section 104(d) of the Mine Act (hereinafter, “Section 104(d) Citations and Orders”). These violations are similar to those described above, but the standard is that the violation could significantly and substantially contribute to the cause and effect of a safety or health hazard, but the conditions do not cause imminent danger, and the MSHA inspector finds that the violation is caused by an unwarranted failure of the operator to comply with the health and safety standards.

• Total number of flagrant violations under section 110(b)(2) of the Mine Act (hereinafter, “Section 110(b)(2) Violations”). These violations are penalty violations issued if MSHA determines that violations are “flagrant”, for which civil penalties may be assessed. A “flagrant” violation means a reckless or repeated failure to make reasonable efforts to eliminate a known violation of a mandatory health or safety standard that substantially and proximately caused, or reasonably could have been expected to cause, death or serious bodily injury.

• Total number of imminent danger orders issued under section 107(a) of the Mine Act (hereinafter, “Section 107(a) Orders”). These orders are issued for situations in which MSHA determines an imminent danger exists in the quarry or mine and results in orders of immediate withdrawal of all persons (except certain authorized persons) from the area of the quarry or mine affected by its condition until the imminent danger and the underlying conditions causing the imminent danger no longer exist.

• Total dollar value of proposed assessments from MSHA under the Mine Act. These are the amounts of proposed assessments issued by MSHA with each citation or order for the time period covered by the reports. Penalties are assessed by MSHA according to a formula that considers a number of factors, including the mine operator’s history, size, negligence, gravity of the violation, good faith in trying to correct the violation promptly, and the effect of the penalty on the operator’s ability to continue in business.

• Total number of mining-related fatalities. Mines subject to the Mine Act are required to report all fatalities occurring at their facilities unless the fatality is determined to be “non-chargeable” to the mining industry. The final rules of the SEC require disclosure of mining-related fatalities at mines subject to the Mine Act. Only fatalities determined by MSHA not to be mining-related may be excluded.

• Receipt of written notice from MSHA of a pattern (or a potential to have such a pattern) of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of other mine health or safety hazards under Section 104(e) of the Mine Act. If MSHA determines that a mine has a “pattern” of these types of violations, or the potential to have such a pattern, MSHA is required to notify the mine operator of the existence of such a thing.

• Legal actions before the Federal Mine Safety and Health Review Commissions pending as of the last day of period.

• Legal actions before the Federal Mine Safety and Health Review Commissions initiated during period.

• Legal actions before the Federal Mine Safety and Health Review Commissions resolved during period.

The Federal Mine Safety and Health Review Commission (the “Commission”) is an independent adjudicative agency that provides administrative trial and appellate review of legal disputes arising under the Mine Act. The cases may involve, among other questions, challenges by operators to citations, orders and penalties they have received from MSHA, or complaints of discrimination by miners under Section 105 of the Mine Act. Appendix 1 shows, for each of the Corporation’s quarries and mines identified, as of June 30, 2013, the number of legal actions pending before the Commission, along with the number of legal actions initiated before the Commission during the quarter as well as resolved during the quarter. In addition, Appendix 1 includes a footnote to the column for legal actions before the Commission pending as of the last day of the period, which footnote breaks down that total number of legal actions pending by categories according to the type of proceeding in accordance with various categories established by the Procedural Rules of the Commission.

Appendix 1 attached.

Appendix 1

Location	MSHA ID	Section 104 S&S Citations (#)		Section 104(b) Orders (#)		Section 104(d) Citations and Orders (#)		Section 110(b)(2) Violations (#)		Section 107(a) Orders (#)		Total Dollar Value of MSHA Assessment/$ Proposed		Total Number of Mining Related Fatalities (#)		Received Notice of Pattern of Violation Under Section 104(e) (yes/no)		Received Notice of Potential to have Pattern under Section 104(e) (yes/no)		Legal Actions Pending as of Last Day of Period (#)*		Legal Actions Instituted During Period (#)		Legal Actions Resolved During Period (#)
American Stone Quarry	3100189		0		0		0		0		0	$	0		0		no		no		0		0		0
Anderson Creek	4402963		0		0		0		0		0	$	0		0		no		no		0		0		0
Arrowood Quarry	3100059		0		0		0		0		0	$	0		0		no		no		0		0		0
Asheboro Quarry	3100066		1		0		0		0		0	$	0		0		no		no		0		0		0
Bakers Quarry	3100071		0		0		0		0		0	$	0		0		no		no		0		0		0
Belgrade Quarry	3100064		1		0		0		0		0	$	0		0		no		no		0		0		0
Benson Quarry	3101979		0		0		0		0		0	$	0		0		no		no		0		0		0
Berkeley Quarry	3800072		0		0		0		0		0	$	0		0		no		no		0		0		0
Bessemer City Quarry	3101105		0		0		0		0		0	$	0		0		no		no		0		0		0
Black Ankle Quarry	3102220		0		0		0		0		0	$	0		0		no		no		0		0		0
Bonds Gravel Pit	3101963		0		0		0		0		0	$	0		0		no		no		0		0		0
Boonsboro Quarry	1800024		0		0		0		0		0	$	0		0		no		no		0		0		1
Burlington Quarry	3100042		0		0		0		0		0	$	0		0		no		no		0		0		0
Caldwell Quarry	3101869		0		0		0		0		0	$	0		0		no		no		1		0		0
Carmel Church Quarry	4405633		0		0		0		0		0	$	0		0		no		no		0		0		0
Castle Hayne Quarry	3100063		0		0		0		0		0	$	0		0		no		no		0		0		0
Cayce Quarry	3800016		1		0		0		0		0	$	0		0		no		no		1		0		0
Central Rock Quarry	3100050		0		0		0		0		0	$	0		0		no		no		0		0		0
Charlotte Quarry	3100057		0		0		0		0		0	$	0		0		no		no		0		0		0
Chesterfield Quarry	3800682		0		0		0		0		0	$	0		0		no		no		0		0		0
Clarks Quarry	3102009		0		0		0		0		0	$	0		0		no		no		0		0		0
Cumberland Quarry	3102237		0		0		0		0		0	$	0		0		no		no		0		0		0
Denver	3101971		0		0		0		0		0	$	0		0		no		no		0		0		0
Doswell Quarry	4400045		0		0		0		0		0	$	0		0		no		no		0		0		1
East Alamance	3102021		0		0		0		0		0	$	0		0		no		no		0		0		0
Fountain Quarry	3100065		0		0		0		0		0	$	0		0		no		no		0		0		0
Franklin Quarry	3102130		0		0		0		0		0	$	0		0		no		no		0		0		0
Fuquay Quarry	3102055		0		0		0		0		0	$	0		0		no		no		0		0		0
Garner Quarry	3100072		1		0		0		0		0	$	0		0		no		no		6		0		0
Georgetown ll Quarry	3800525		0		0		0		0		0	$	0		0		no		no		0		0		0
Hickory Quarry	3100043		0		0		0		0		0	$	0		0		no		no		0		0		0
Hicone Quarry	3102088		0		0		0		0		0	$	0		0		no		no		0		0		0
Jamestown Quarry	3100051		0		0		0		0		0	$	0		0		no		no		0		0		0
Kannapolis Quarry	3100070		0		0		0		0		0	$	0		0		no		no		0		0		0
Kings Mountain Quarry	3100047		0		0		0		0		0	$	0		0		no		no		0		0		0
Lemon Springs Quarry	3101104		0		0		0		0		0	$	0		0		no		no		0		0		0
Loamy Sand and Gravel	3800721		0		0		0		0		0	$	0		0		no		no		0		0		0
Maiden Quarry	3102125		0		0		0		0		0	$	0		0		no		no		0		0		0
Mallard Creek Quarry	3102006		0		0		0		0		0	$	0		0		no		no		0		0		0
Matthews Quarry	3102084		0		0		0		0		0	$	0		0		no		no		0		0		0
Midlothian Quarry	4403767		0		0		0		0		0	$	0		0		no		no		0		0		0
North Columbia Quarry	3800146		0		0		0		0		0	$	0		0		no		no		0		0		0
Onslow Quarry	3102120		0		0		0		0		0	$	0		0		no		no		0		0		0
Pinesburg	1800021		0		0		0		0		0	$	0		0		no		no		0		0		1
Pomona Quarry	3100052		1		0		0		0		0	$	0		0		no		no		0		0		0
Raleigh Durham Quarry	3101941		0		0		0		0		0	$	0		0		no		no		0		0		1
Red Hill Quarry	4400072		0		0		0		0		0	$	0		0		no		no		0		0		0
Reidsville Quarry	3100068		0		0		0		0		0	$	0		0		no		no		0		0		0
Rock Hill Quarry	3800026		1		0		0		0		0	$	0		0		no		no		0		0		0
Rocky River Quarry	3102033		0		0		0		0		0	$	0		0		no		no		0		0		0
Salem Stone Company	3102038		0		0		0		0		0	$	0		0		no		no		0		0		0
Siler City Quarry	3100044		0		0		0		0		0	$	0		0		no		no		0		0		0

Appendix 1

Location	MSHA ID	Section 104 S&S Citations (#)		Section 104(b) Orders (#)		Section 104(d) Citations and Orders (#)		Section 110(b)(2) Violations (#)		Section 107(a) Orders (#)		Total Dollar Value of MSHA Assessment/$ Proposed		Total Number of Mining Related Fatalities (#)		Received Notice of Pattern of Violation Under Section 104(e) (yes/no)		Received Notice of Potential to have Pattern under Section 104(e) (yes/no)		Legal Actions Pending as of Last Day of Period (#)*		Legal Actions Instituted During Period (#)		Legal Actions Resolved During Period (#)
Statesville Quarry	3100055		0		0		0		0		0	$	0		0		no		no		0		0		0
Thomasville Quarry	3101475		0		0		0		0		0	$	0		0		no		no		0		0		0
Wilson Quarry	3102230		0		0		0		0		0	$	0		0		no		no		0		0		0
Woodleaf Quarry	3100069		0		0		0		0		0	$	0		0		no		no		0		0		0
(45) North Indianapolis SURFACE	1200002		0		0		0		0		0	$	0		0		no		no		0		0		0
Apple Grove	3301676		0		0		0		0		0	$	0		0		no		no		0		0		0
Belmont Sand	1201911		1		0		0		0		0	$	585		0		no		no		0		0		0
Blue Rock	3300016		0		0		0		0		0	$	0		0		no		no		0		0		0
Burning Springs	4608862		0		0		0		0		0	$	0		0		no		no		4		0		3
Carmel SandG	1202124		0		0		0		0		0	$	0		0		no		no		0		0		0
Cedarville	3304072		0		0		0		0		0	$	0		0		no		no		0		0		0
Clinton County	3304546		0		0		0		0		0	$	0		0		no		no		0		0		0
Cloverdale	1201744		0		0		0		0		0	$	0		0		no		no		0		0		0
Cook Road	3304534		0		0		0		0		0	$	0		0		no		no		0		0		0
Dredge Lucas	4603800		0		0		0		0		0	$	0		0		no		no		0		0		0
E-Town SandG	3304279		0		0		0		0		0	$	0		0		no		no		0		0		0
Fairborn Gravel	3301388		0		0		0		0		0	$	0		0		no		no		0		0		0
Fairfield	3301396		0		0		0		0		0	$	0		0		no		no		0		0		0
Franklin Gravel	3302940		0		0		0		0		0	$	0		0		no		no		0		0		0
Hamilton Gravel	3301394		0		0		0		0		0	$	0		0		no		no		0		0		0
Harrison	3301395		0		0		0		0		0	$	0		0		no		no		0		0		0
Kentucky Ave Mine	1201762		0		0		0		0		0	$	0		0		no		no		0		0		0
Kokomo Mine	1202105		0		0		0		0		0	$	100		0		no		no		0		0		0
Kokomo Sand	1202203		0		0		0		0		0	$	0		0		no		no		0		0		0
Kokomo Stone	1200142		0		0		0		0		0	$	0		0		no		no		0		0		0
Lynchburg Quarry	3304281		0		0		0		0		0	$	0		0		no		no		0		0		0
Noblesville SandG	1201994		0		0		0		0		0	$	0		0		no		no		0		0		0
Noblesville Stone	1202176		0		0		0		0		0	$	0		0		no		no		1		1		0
North Indianapolis	1201993		0		0		0		0		0	$	0		0		no		no		0		0		0
Ohio Recycle	3304394		0		0		0		0		0	$	0		0		no		no		0		0		0
Ohio Stripping	N354		0		0		0		0		0	$	0		0		no		no		0		0		0
Petersburg	1516895		0		0		0		0		0	$	100		0		no		no		0		0		0
Phillipsburg	3300006		0		0		0		0		0	$	0		0		no		no		0		0		0
Ross Gravel	3301587		0		0		0		0		0	$	0		0		no		no		0		0		0
Troy Gravel	3301678		0		0		0		0		0	$	0		0		no		no		0		0		0
Waverly Sand	1202038		1		0		0		0		0	$	100		0		no		no		0		0		0
Xenia	3301393		0		0		0		0		0	$	0		0		no		no		0		0		0
Alabaster Quarry	103068		0		0		0		0		0	$	0		0		no		no		0		0		0
Appling Quarry	901083		0		0		0		0		0	$	0		0		no		no		0		0		0
Auburn, Al Quarry	100006		0		0		0		0		0	$	0		0		no		no		4		0		0
Auburn, GA Quarry	900436		0		0		0		0		0	$	0		0		no		no		0		0		0
Augusta Quarry-GA	900065		0		0		0		0		0	$	0		0		no		no		2		0		0
Birmingham Shop	102096		0		0		0		0		0	$	0		0		no		no		0		0		0
Cabbage Grove Quarry	800008		0		0		0		0		0	$	0		0		no		no		0		0		0
Camak Quarry	900075		0		0		0		0		0	$	0		0		no		no		0		0		0
Chattanooga Quarry	4003159		0		0		0		0		0	$	0		0		no		no		1		0		0
Forsyth Quarry	901035		0		0		0		0		0	$	100		0		no		no		0		0		0
Jefferson Quarry	901106		0		0		0		0		0	$	0		0		no		no		0		0		0
Junction City Quarry	901029		0		0		0		0		0	$	0		0		no		no		0		0		0
Lithonia Quarry	900023		0		0		0		0		0	$	0		0		no		no		0		0		0
Maylene Quarry	100634		0		0		0		0		0	$	100		0		no		no		0		0		0
Newton Quarry	900899		0		0		0		0		0	$	0		0		no		no		0		0		0

Appendix 1

Location	MSHA ID	Section 104 S&S Citations (#)		Section 104(b) Orders (#)		Section 104(d) Citations and Orders (#)		Section 110(b)(2) Violations (#)		Section 107(a) Orders (#)		Total Dollar Value of MSHA Assessment/$ Proposed		Total Number of Mining Related Fatalities (#)		Received Notice of Pattern of Violation Under Section 104(e) (yes/no)		Received Notice of Potential to have Pattern under Section 104(e) (yes/no)		Legal Actions Pending as of Last Day of Period (#)*		Legal Actions Instituted During Period (#)		Legal Actions Resolved During Period (#)
Paulding Quarry	901107		0		0		0		0		0	$	0		0		no		no		0		0		0
Perry Quarry	801083		0		0		0		0		0	$	0		0		no		no		0		0		0
Red Oak Quarry	900069		0		0		0		0		0	$	127		0		no		no		0		0		0
R-S Sand and Gravel	2200381		0		0		0		0		0	$	227		0		no		no		1		0		0
Ruby Quarry	900074		0		0		0		0		0	$	0		0		no		no		0		0		0
Shorter Sand and Gravel	102852		0		0		0		0		0	$	0		0		no		no		0		0		0
Six Mile Quarry	901144		0		0		0		0		0	$	0		0		no		no		0		0		0
Tyrone Quarry	900306		0		0		0		0		0	$	100		0		no		no		0		0		0
Vance Quarry	103022		0		0		0		0		0	$	0		0		no		no		1		0		0
Warrenton Quarry	900580		0		0		0		0		0	$	0		0		no		no		0		0		0
Alden Portable Sand	1302037		0		0		0		0		0	$	0		0		no		no		0		0		0
Alden Portable Plant 1	1302031		0		0		0		0		0	$	0		0		no		no		0		0		0
Alden Portable Plant 2	1302033		0		0		0		0		0	$	0		0		no		no		0		0		0
Alden Portable Wash	1302122		0		0		0		0		0	$	0		0		no		no		0		0		0
Alden Quarry	1300228		0		0		0		0		0	$	0		0		no		no		0		0		0
Alden Shop	1302320		0		0		0		0		0	$	0		0		no		no		0		0		0
Ames Mine	1300014		1		0		0		0		0	$	0		0		no		no		0		0		0
Beaver Lake Quarry	4503347		0		0		0		0		0	$	0		0		no		no		0		0		0
Cedar Rapids Quarry	1300122		0		0		0		0		0	$	0		0		no		no		0		0		0
Colfax Sand and Gravel	1300814		0		0		0		0		0	$	0		0		no		no		0		0		0
Des Moines Portable	1300150		0		0		0		0		0	$	0		0		no		no		0		0		0
Dubois Quarry	2501046		0		0		0		0		0	$	0		0		no		no		0		0		0
Durham Mine	1301225		0		0		0		0		0	$	0		0		no		no		0		0		0
Earlham Quarry	1302123		0		0		0		0		0	$	0		0		no		no		0		0		0
Ferguson Quarry	1300124		1		0		0		0		0	$	0		0		no		no		0		0		0
Fort Calhoun	2500006		0		0		0		0		0	$	0		0		no		no		0		0		0
Fort Dodge Mine	1300032		1		0		0		0		0	$	1,412		0		no		no		0		0		2
Iowa Grading	1302316		0		0		0		0		0	$	0		0		no		no		0		0		0
Iowa Grading 26810 (Plant #854)	1302126		0		0		0		0		0	$	0		0		no		no		0		0		0
LeGrand Portable	1302317		0		0		0		0		0	$	0		0		no		no		0		0		0
Linn County Sand	1302208		0		0		0		0		0	$	0		0		no		no		0		1		0
Malcom Mine	1300112		0		0		0		0		0	$	0		0		no		no		0		0		0
Marshalltown Sand	1300718		0		0		0		0		0	$	0		0		no		no		0		0		0
Moore Quarry	1302188		0		0		0		0		0	$	0		0		no		no		0		0		0
New Harvey Sand	1301778		0		0		0		0		0	$	0		0		no		no		0		0		0
Northwest Division OH	A2354		0		0		0		0		0	$	0		0		no		no		0		0		0
Pacific Quarry	4500844		0		0		0		0		0	$	0		0		no		no		0		0		0
Pederson Quarry	1302192		0		0		0		0		0	$	0		0		no		no		0		0		0
Raccoon River Sand	1302315		0		0		0		0		0	$	0		0		no		no		0		0		0
Saylorville Sand	1302290		0		0		0		0		0	$	0		0		no		no		0		0		0
Springfield Quarry	2501103		0		0		0		0		0	$	0		0		no		no		0		0		0
St Cloud Quarry	2100081		0		0		0		0		0	$	0		0		no		no		0		0		0
Sully Mine	1300063		0		0		0		0		0	$	0		0		no		no		0		0		0
Weeping Water Mine	2500998		3		0		0		0		0	$	1,872		0		no		no		10		2		5
West Des Moines Shop	1300932		0		0		0		0		0	$	0		0		no		no		0		0		0
Yellow Medicine Quarry	2100033		0		0		0		0		0	$	0		0		no		no		0		0		0
211 Quarry	4103829		0		0		0		0		0	$	0		0		no		no		0		0		0
Beckman Quarry	4101335		0		0		0		0		0	$	217		0		no		no		0		0		0
Bedrock Plant	4103283		0		0		0		0		0	$	0		0		no		no		0		0		0
Black Spur Quarry	4104159		3		0		0		0		0	$	0		0		no		no		0		0		1
Chico	4103360		0		0		0		0		0	$	0		0		no		no		0		0		0
Cobey	4104140		0		0		0		0		0	$	0		0		no		no		0		0		0

Appendix 1

Location	MSHA ID	Section 104 S&S Citations (#)		Section 104(b) Orders (#)		Section 104(d) Citations and Orders (#)		Section 110(b)(2) Violations (#)		Section 107(a) Orders (#)		Total Dollar Value of MSHA Assessment/$ Proposed		Total Number of Mining Related Fatalities (#)		Received Notice of Pattern of Violation Under Section 104(e) (yes/no)		Received Notice of Potential to have Pattern under Section 104(e) (yes/no)		Legal Actions Pending as of Last Day of Period (#)*		Legal Actions Instituted During Period (#)		Legal Actions Resolved During Period (#)
Davis	3401299		1		0		0		0		0	$	374		0		no		no		0		0		0
Garwood	4102886		0		0		0		0		0	$	200		0		no		no		0		0		0
Helotes	4103137		0		0		0		0		0	$	0		0		no		no		0		0		0
Hondo	4104708		0		0		0		0		0	$	0		0		no		no		0		0		0
Hondo-1	4104090		0		0		0		0		0	$	0		0		no		no		0		0		0
Mill Creek	3401285		0		0		0		0		0	$	0		0		no		no		0		0		0
New Braunfels Quarry	4104264		0		0		0		0		0	$	0		0		no		no		0		0		0
North Troy	3401905		0		0		0		0		0	$	138		0		no		no		0		0		0
North Troy Portable	3401949		0		0		0		0		0	$	0		0		no		no		0		0		0
Portable Crushing	4104204		0		0		0		0		0	$	0		0		no		no		1		0		1
Poteet (Sand Plant)	4101342		0		0		0		0		0	$	0		0		no		no		0		0		0
Rio Medina	4103594		0		0		0		0		0	$	0		0		no		no		0		0		2
S.T. Porter Pit	4102673		0		0		0		0		0	$	0		0		no		no		0		0		1
San Pedro Quarry	4101337		0		0		0		0		0	$	0		0		no		no		0		0		0
Snyder	3401651		4		0		0		0		0	$	1,611		0		no		no		0		0		0
Augusta Quarry-KS	1400126		1		0		0		0		0	$	0		0		no		no		0		0		0
Black Rock Quarry	300011		0		0		0		0		0	$	0		0		no		no		0		0		0
Blake Quarry	1401584		0		0		0		0		0	$	0		0		no		no		0		0		0
Broken Bow SandG	3400460		0		0		0		0		0	$	0		0		no		no		1		0		0
Greenwood	2300141		0		0		0		0		0	$	0		0		no		no		1		1		1
Hatton Quarry	301614		0		0		0		0		0	$	200		0		no		no		0		0		0
Hugo	3400061		0		0		0		0		0	$	0		0		no		no		0		0		0
Idabel	3400507		0		0		0		0		0	$	0		0		no		no		0		0		0
Jones Mill Quarry	301586		0		0		0		0		0	$	0		0		no		no		0		0		0
Kansas Portable	1401659		0		0		0		0		0	$	0		0		no		no		0		0		0
North Marion Quarry	1401506		0		0		0		0		0	$	0		0		no		no		0		0		0
Ottawa Quarry	1401590		0		0		0		0		0	$	0		0		no		no		0		0		0
Parkville Mine	2301883		1		0		0		0		0	$	290		0		no		no		0		0		0
Randolph Deep Mine	2302308		1		0		0		0		0	$	407		0		no		no		0		0		0
Sawyer	3401634		0		0		0		0		0	$	0		0		no		no		0		0		0
Stamper Mine	2302232		1		0		0		0		0	$	362		0		no		no		0		0		0
Sunflower	1401556		0		0		0		0		0	$	0		0		no		no		0		0		0
Cottonwood Sand and Gravel	504418		0		0		0		0		0	$	0		0		no		no		0		0		0
Fountain Sand and Gravel	503821		0		0		0		0		0	$	0		0		no		no		0		0		0
Granite Canyon Quarry	4800018		1		0		0		0		0	$	1,111		0		no		no		0		0		0
Greeley 35th Ready Mix	503215		0		0		0		0		0	$	0		0		no		no		0		0		0
Greeley 35th Sand and Gravel	504613		0		0		0		0		0	$	0		0		no		no		0		0		0
Guernsey	4800004		0		0		0		0		0	$	0		0		no		no		0		0		0
Gypsum Portable #4 & #11	504320		0		0		0		0		0	$	0		0		no		no		0		0		0
Mamm Creek Portable #15	504647		0		0		0		0		0	$	0		0		no		no		0		0		0
Milford	4202177		0		0		0		0		0	$	0		0		no		no		0		0		0
Mustang Quarry	2602484		0		0		0		0		0	$	0		0		no		no		0		0		0
Portable Crushing	503984		0		0		0		0		0	$	0		0		no		no		0		0		0
Portable Plant 10	503984		0		0		0		0		0	$	0		0		no		no		0		0		0
Portable Recycle 18	501057		0		0		0		0		0	$	0		0		no		no		0		0		0
Portable Recycle 2	504360		0		0		0		0		0	$	0		0		no		no		0		0		0
Portable Recycle 21	504520		0		0		0		0		0	$	0		0		no		no		0		0		0
Powers Portable	504531		0		0		0		0		0	$	100		0		no		no		0		0		0
Riverbend Sand and Gravel	504841		0		0		0		0		0	$	0		0		no		no		0		0		0
Sievers Portable #19 & #20	504531		0		0		0		0		0	$	0		0		no		no		0		0		0
Spanish Springs Co 2	2600803		0		0		0		0		0	$	0		0		no		no		0		0		0
Spec Agg Sand and Gravel	500860		0		0		0		0		0	$	0		0		no		no		0		0		0

Appendix 1

Location	MSHA ID	Section 104 S&S Citations (#)		Section 104(b) Orders (#)		Section 104(d) Citations and Orders (#)		Section 110(b)(2) Violations (#)		Section 107(a) Orders (#)		Total Dollar Value of MSHA Assessment/$ Proposed		Total Number of Mining Related Fatalities (#)		Received Notice of Pattern of Violation Under Section 104(e) (yes/no)		Received Notice of Potential to have Pattern under Section 104(e) (yes/no)		Legal Actions Pending as of Last Day of Period (#)*		Legal Actions Instituted During Period (#)		Legal Actions Resolved During Period (#)
Table Mountain Quarry	404847		0		0		0		0		0	$	0		0		no		no		0		0		0
Taft Sand and Gravel	504526		0		0		0		0		0	$	0		0		no		no		0		0		0
Taft Shop	504735		0		0		0		0		0	$	0		0		no		no		0		0		0
Salisbury Shop	3101235		0		0		0		0		0	$	0		0		no		no		0		0		0
Woodville	3300156		5		0		0		0		0	$	0		0		no		no		0		0		0
TOTALS			32		0		0		0		0	$	9,833		0		no		no		35		5		20

* Of the 35 legal actions pending on September 30, 2013, 25 were contests of citations or orders referenced in Subpart B of CFR Part 2700, which includes contests of citations and orders issued under Section 104 of the Mine Act and contests of imminent danger orders under Section 107 of the Mine Act, and 10 were contests of proposed penalties referenced in Subpart C of 29 CFR Part 2700, which are administrative proceedings before the Commission challenging a civil penalty that MSHA has proposed for the violation contained in a citation or order.

XML

Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2013

Supplemental Cash Flow Information

10. Supplemental Cash Flow Information

The components of the change in other assets and liabilities, net, are as follows:

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Other current and noncurrent assets	$	(42)	$	(9,694)
Accrued salaries, benefits and payroll taxes		(1,307)		(1,270)
Accrued insurance and other taxes		5,761		7,767
Accrued income taxes		18,369		7,817
Accrued pension, postretirement and postemployment benefits		(10,431)		(14,693)
Other current and noncurrent liabilities		13,228		14,956
	$	25,578	$	4,883

The change in other current and noncurrent assets from 2012 to 2013 is driven by unrecognized tax benefits related to the settlement of the APA described in Note 6 and an increase in sales tax refunds in 2012.

The change in accrued income taxes is driven by an increase in the estimated current tax liability for 2013.

XML

CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Sales	$ 600,457	$ 537,507	$ 1,451,848	$ 1,376,944
Freight and delivery revenues	64,863	54,761	158,707	152,699
Total revenues	665,320	592,268	1,610,555	1,529,643
Cost of sales	457,349	413,485	1,188,923	1,126,532
Freight and delivery costs	64,863	54,761	158,707	152,699
Total cost of revenues	522,212	468,246	1,347,630	1,279,231
Gross Profit	143,108	124,022	262,925	250,412
Selling, general & administrative expenses	37,140	32,095	112,632	100,398
Business development costs	89		671	35,140
Other operating (income) and expenses, net	(2,964)	394	(5,535)	(1,070)
Earnings from Operations	108,843	91,533	155,157	115,944
Interest expense	13,518	13,224	40,633	39,967
Other nonoperating expenses and (income), net	101	620	179	(1,277)
Earnings from continuing operations before taxes on income	95,224	77,689	114,345	77,254
Income tax expense	22,915	13,701	29,615	12,484
Earnings from Continuing Operations	72,309	63,988	84,730	64,770
Loss on discontinued operations, net of related tax benefit of $185, $371, $250 and $547, respectively	(271)	(319)	(454)	(967)
Consolidated net earnings	72,038	63,669	84,276	63,803
Less: Net earnings (loss) attributable to noncontrolling interests	202	747	(1,028)	863
Net Earnings Attributable to Martin Marietta Materials, Inc.	71,836	62,922	85,304	62,940
Net Earnings Attributable to Martin Marietta Materials, Inc.
Earnings from continuing operations	72,107	63,241	85,758	63,907
Loss from discontinued operations	(271)	(319)	(454)	(967)
Net Earnings Attributable to Martin Marietta Materials, Inc.	71,836	62,922	85,304	62,940
Consolidated Comprehensive Earnings (See Note 1)
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	75,384	66,082	88,763	69,350
Earnings (Loss) attributable to noncontrolling interests	205	750	(1,020)	873
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 75,589	$ 66,832	$ 87,743	$ 70,223
Net Earnings (Loss) Attributable to Martin Marietta Materials, Inc. Per Common Share
Basic from continuing operations attributable to common shareholders	$ 1.56	$ 1.37	$ 1.85	$ 1.39
Discontinued operations attributable to common shareholders	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.02)
Earnings Per Share, Basic, Total	$ 1.55	$ 1.36	$ 1.84	$ 1.37
Diluted from continuing operations attributable to common shareholders	$ 1.55	$ 1.37	$ 1.85	$ 1.38
Discontinued operations attributable to common shareholders	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.02)
Earnings Per Share, Diluted, Total	$ 1.54	$ 1.36	$ 1.84	$ 1.36
Weighted-Average Common Shares Outstanding
Basic	46,244	45,860	46,134	45,792
Diluted	46,349	45,992	46,261	45,929
Cash Dividends Per Common Share	$ 0.40	$ 0.40	$ 1.20	$ 1.20

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Inventories, Net

9 Months Ended

Sep. 30, 2013

Inventories, Net

3. Inventories, Net

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
Finished products	$	366,558	$	355,881	$	356,849
Products in process and raw materials		19,924		16,442		18,918
Supplies and expendable parts		61,441		56,805		56,420
		447,923		429,128		432,187
Less allowances		(97,485)		(96,817)		(97,095)
Total	$	350,438	$	332,311	$	335,092

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Business Segments (Tables)

9 Months Ended

Sep. 30, 2013

Financial Data for Continuing Operations for the Corporation's Reportable Business Segments

The following tables display selected financial data for continuing operations for the Corporation’s reportable business segments. Corporate loss from operations primarily includes depreciation on capitalized interest, expenses for corporate administrative functions, unallocated corporate expenses and other nonrecurring and/or non-operational adjustments. Prior-year segment information has been reclassified to conform to the presentation of the Corporation’s current reportable segments.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Total revenues:
Mid-America Group	$	237,696	$	212,164	$	555,823	$	538,881
Southeast Group		69,491		61,369		185,676		184,448
West Group		297,517		264,662		686,867		640,689
Total Aggregates Business		604,704		538,195		1,428,366		1,364,018
Specialty Products		60,616		54,073		182,189		165,625
Total	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Net sales:
Mid-America Group	$	216,361	$	194,128	$	508,999	$	493,453
Southeast Group		64,871		57,021		171,456		171,027
West Group		263,431		236,911		603,798		560,838
Total Aggregates Business		544,663		488,060		1,284,253		1,225,318
Specialty Products		55,794		49,447		167,595		151,626
Total	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Earnings (Loss) from operations:
Mid-America Group	$	66,419	$	56,357	$	102,342	$	94,959
Southeast Group		(1,386)		(3,452)		(14,949)		(14,980)
West Group		32,302		23,666		38,402		29,183
Total Aggregates Business		97,335		76,571		125,795		109,162
Specialty Products		17,267		17,034		53,071		52,706
Corporate		(5,759)		(2,072)		(23,709)		(45,924)
Total	$	108,843	$	91,533	$	155,157	$	115,944

Asset Employed for Continuing Operations for Corporations Reportable Business Segments

Assets employed for the Mid-America and West Groups have been recast since prior year as a result of the Corporation’s reorganization of the operations of its Aggregates business (see Note 1).

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
Assets employed:
Mid-America Group	$	1,161,756	$	1,036,155	$	1,074,451
Southeast Group		628,673		607,705		614,214
West Group		1,172,289		1,147,879		1,188,373
Total Aggregates Business		2,962,718		2,791,739		2,877,038
Specialty Products		153,334		157,673		154,155
Corporate		221,053		211,514		212,011
Total	$	3,337,105	$	3,160,926	$	3,243,204

Net Sales By Product Line

The following tables provide net sales and gross profit by product line for the Aggregates business and are reconciled to consolidated net sales and gross profit.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net sales:
Aggregates	$	411,206	$	371,398	$	1,016,238	$	985,563
Asphalt		23,787		28,881		52,231		61,655
Ready Mixed Concrete		41,765		31,531		103,347		78,746
Road Paving		67,905		56,250		112,437		99,354
Total Aggregates Business		544,663		488,060		1,284,253		1,225,318
Specialty Products		55,794		49,447		167,595		151,626
Total	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Gross profit (loss):
Aggregates	$	108,166	$	94,541	$	189,171	$	182,883
Asphalt		7,322		6,359		9,770		9,065
Ready Mixed Concrete		3,124		472		4,911		421
Road Paving		4,286		2,276		(285)		208
Total Aggregates Business		122,898		103,648		203,567		192,577
Specialty Products		19,919		19,744		60,784		59,057
Corporate		291		630		(1,426)		(1,222)
Total	$	143,108	$	124,022	$	262,925	$	250,412

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Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2013

Organization

Organization

Martin Marietta Materials, Inc., (the “Corporation”) is engaged principally in the construction aggregates business. The Corporation’s aggregates product line, which accounted for 71% of consolidated 2012 net sales, includes crushed stone, sand and gravel, and is used primarily for construction of highways and other infrastructure projects, and in the nonresidential and residential construction industries. Aggregates products are also used in the railroad, environmental, utility and agricultural industries. These aggregates products, along with the asphalt products, ready mixed concrete and road paving construction services of the Corporation’s vertically-integrated operations (which accounted for 18% of consolidated 2012 net sales), are sold and shipped from a network of 303 quarries, distribution facilities and plants to customers in 33 states, Canada, the Bahamas and the Caribbean Islands. The aggregates and vertically-integrated operations are reported collectively as the Corporation’s “Aggregates business”.

Effective January 1, 2013, the Corporation reorganized the operations and management reporting structure of its Aggregates business, resulting in a change to its reportable segments. The Corporation currently conducts its Aggregates business through three reportable segments as follows:

AGGREGATES BUSINESS
Reportable Segments	Mid-America Group	Southeast Group	West Group
Operating Locations	Indiana, Iowa, Kentucky, Maryland, Minnesota, eastern Nebraska, North Dakota, North Carolina, Ohio, South Carolina, Virginia, Washington and West Virginia	Alabama, Florida, Georgia, Mississippi, Tennessee, Nova Scotia and the Bahamas	Arkansas, Colorado, Kansas, Louisiana, Missouri, western Nebraska, Nevada, Oklahoma, Texas, Utah and Wyoming

In addition to the Aggregates business, the Corporation has a Specialty Products segment, accounting for 11% of consolidated 2012 net sales, which produces magnesia-based chemicals products used in industrial, agricultural and environmental applications and dolomitic lime sold primarily to customers in the steel industry.

Basis of Presentation

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Corporation have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and in Article 10 of Regulation S-X. The Corporation has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012, filed with the Securities and Exchange Commission on February 22, 2013. In the opinion of management, the interim consolidated financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of the results of operations, financial position and cash flows for the interim periods. The consolidated results of operations for the three and nine months ended September 30, 2013 are not indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by generally accepted accounting principles for complete financial statements. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012.

Reclassifications

Reclassifications

Prior-year segment information for the Aggregates business presented in Note 9 has been reclassified to conform to the presentation of the Corporation’s current reportable segments.

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss

Consolidated comprehensive earnings/loss for the Corporation consist of consolidated net earnings or loss; adjustments for the funded status of pension and postretirement benefit plans; foreign currency translation adjustments; and the amortization of the value of terminated forward starting interest rate swap agreements into interest expense.

Comprehensive earnings attributable to Martin Marietta Materials, Inc. are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings attributable to Martin Marietta Materials, Inc.	$	71,836	$	62,922	$	85,304	$	62,940
Other comprehensive earnings, net of tax		3,548		3,160		3,459		6,410
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	$	75,384	$	66,082	$	88,763	$	69,350

Comprehensive earnings (loss) attributable to noncontrolling interests, consisting of net earnings or loss and adjustments for the funded status of pension and postretirement benefit plans, are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings (loss) attributable to noncontrolling interests	$	202	$	747	$	(1,028)	$	863
Other comprehensive earnings, net of tax		3		3		8		10
Comprehensive earnings (loss) attributable to noncontrolling interests	$	205	$	750	$	(1,020)	$	873

Changes in accumulated other comprehensive earnings, net of tax, are as follows:

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Three Months Ended September 30, 2013
Balance at beginning of period	$	(106,603)	$	4,153	$	(3,808)	$	(106,258)
Other comprehensive earnings before reclassifications, net of tax		--		993		--		993
Amounts reclassified from accumulated other comprehensive loss, net of tax		2,387		--		168		2,555
Other comprehensive earnings, net of tax		2,387		993		168		3,548
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Three Months Ended September 30, 2012
Balance at beginning of period	$	(81,407)	$	5,222	$	(4,455)	$	(80,640)
Other comprehensive earnings before reclassifications, net of tax		117		1,435		--		1,552
Amounts reclassified from accumulated other comprehensive loss, net of tax		1,451		--		157		1,608
Other comprehensive earnings, net of tax		1,568		1,435		157		3,160
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Other comprehensive loss before reclassifications for pension and postretirement benefit plans is net of tax of $0 and $77,000 for the three months ended September 30, 2013 and 2012, respectively.

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	(108,189)	$	6,157	$	(4,137)	$	(106,169)
Other comprehensive loss before reclassifications, net of tax		(2,312)		(1,011)		--		(3,323)
Amounts reclassified from accumulated other comprehensive loss, net of tax		6,285		--		497		6,782
Other comprehensive earnings (loss), net of tax		3,973		(1,011)		497		3,459
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Nine Months Ended September 30, 2012
Balance at beginning of period	$	(84,204)	$	5,076	$	(4,762)	$	(83,890)
Other comprehensive (loss) earnings before reclassifications, net of tax		(349)		1,581		--		1,232
Amounts reclassified from accumulated other comprehensive loss, net of tax		4,714		--		464		5,178
Other comprehensive earnings, net of tax		4,365		1,581		464		6,410
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Other comprehensive loss before reclassifications for pension and postretirement benefit plans is net of tax of $1,514,000 and $225,000 for the nine months ended September 30, 2013 and 2012, respectively.

Changes in net noncurrent deferred tax assets recorded in accumulated other comprehensive loss are as follows:

	(Dollars in Thousands)
	Pension and Postretirement Benefit Plans			Unamortized Value of Terminated Forward Starting Interest Rate Swap			Net Noncurrent Deferred Tax Assets
		Three Months Ended September 30, 2013
Balance at beginning of period	$	69,842		$	2,492		$	72,334
Tax effect of other comprehensive earnings		(1,566	)		(111	)		(1,677	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Three Months Ended September 30, 2012
Balance at beginning of period	$	53,328		$	2,915		$	56,243
Tax effect of other comprehensive earnings		(1,026	)		(103	)		(1,129	)
Balance at end of period	$	52,302		$	2,812		$	55,114
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	70,881		$	2,707		$	73,588
Tax effect of other comprehensive earnings		(2,605	)		(326	)		(2,931	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Nine Months Ended September 30, 2012
Balance at beginning of period	$	55,161		$	3,116		$	58,277
Tax effect of other comprehensive earnings		(2,859	)		(304	)		(3,163	)
Balance at end of period	$	52,302		$	2,812		$	55,114

Reclassifications out of accumulated other comprehensive loss are as follows:

	Three Months Ended September  30,						Nine Months Ended September  30,						Affected line items in the consolidated financial statements
	2013			2012			2013			2012
		(Dollars in Thousands)
Pension and postretirement benefit plans
Settlement charge	$	729		$	255		$	729		$	779
Amortization of:
Prior service credit		(702	)		(704	)		(2,104	)		(2,092	)
Actuarial loss		3,926			2,849			11,779			9,111
		3,953			2,400			10,404			7,798		Cost of sales; Selling, general & administrative expenses
Tax effect		(1,566	)		(949	)		(4,119	)		(3,084	)	Deferred income taxes
	$	2,387		$	1,451		$	6,285		$	4,714
Unamortized value of terminated forward starting interest rate swap
Additional interest expense	$	279		$	260		$	823		$	768		Interest expense
Tax effect		(111	)		(103	)		(326	)		(304	)	Deferred income taxes
	$	168		$	157		$	497		$	464

Earnings per Common Share

Earnings per Common Share

The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta Materials, Inc., reduced by dividends and undistributed earnings attributable to the Corporation’s unvested restricted stock awards and incentive stock awards. If there is a net loss, no amount of the undistributed loss is attributed to unvested participating securities. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Corporation’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive.

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(In Thousands)
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	72,107	$	63,241	$	85,758	$	63,907
Less: Distributed and undistributed earnings attributable to unvested awards		265		336		374		386
Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		71,842		62,905		85,384		63,521
Basic and diluted net loss available to common shareholders from discontinued operations		(271)		(319)		(454)		(967)
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	71,571	$	62,586	$	84,930	$	62,554
Basic weighted-average common shares outstanding		46,244		45,860		46,134		45,792
Effect of dilutive employee and director awards		105		132		127		137
Diluted weighted-average common shares outstanding		46,349		45,992		46,261		45,929

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Components of Change in Other Assets and Liabilities Net (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Schedule of Cash Flow, Supplemental
Other current and noncurrent assets	$ (42)	$ (9,694)
Accrued salaries, benefits and payroll taxes	(1,307)	(1,270)
Accrued insurance and other taxes	5,761	7,767
Accrued income taxes	18,369	7,817
Accrued pension, postretirement and postemployment benefits	(10,431)	(14,693)
Other current and noncurrent liabilities	13,228	14,956
Change in other assets and liabilities	$ 25,578	$ 4,883

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Financial Instruments - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Maturities of cash equivalents, in months	Three
Long-term debt, carrying values	$ 1,113,361,000	$ 1,047,859,000	$ 1,098,788,000
Long-term debt, fair values	$ 1,152,906,000	$ 1,105,650,000	$ 1,156,820,000

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Comprehensive Earnings Attributable to Martin Marietta Materials Incorporated (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Comprehensive Income (Loss)
Net earnings attributable to Martin Marietta Materials, Inc.	$ 71,836	$ 62,922	$ 85,304	$ 62,940
Other comprehensive earnings, net of tax	3,548	3,160	3,459	6,410
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	$ 75,384	$ 66,082	$ 88,763	$ 69,350

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Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012 State
Significant Accounting Policies [Line Items]
Number of quarries distribution facilities and plants					303
Number of states with aggregates business sales by destination					33
Other comprehensive loss before reclassifications for pension and postretirement benefit plans, tax	$ 0	$ 77,000	$ 1,514,000	$ 225,000
Specialty Products | Sales
Significant Accounting Policies [Line Items]
Total net sales, Percentage					11.00%
Aggregates Product Line | Sales
Significant Accounting Policies [Line Items]
Total net sales, Percentage					71.00%
Vertically Integrated | Sales
Significant Accounting Policies [Line Items]
Total net sales, Percentage					18.00%

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Asset Employed for Continuing Operations for Corporations Reportable Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 3,337,105	$ 3,160,926	$ 3,243,204
Total Aggregates Business
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,962,718	2,791,739	2,877,038
Specialty Products
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	153,334	157,673	154,155
Mid-America Group
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,161,756	1,036,155	1,074,451
Southeast Group
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	628,673	607,705	614,214
West Group
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,172,289	1,147,879	1,188,373
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 221,053	$ 211,514	$ 212,011

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Inventories Net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Inventory Disclosure
Finished products	$ 366,558	$ 355,881	$ 356,849
Products in process and raw materials	19,924	16,442	18,918
Supplies and expendable parts	61,441	56,805	56,420
Inventories, Gross	447,923	429,128	432,187
Less allowances	(97,485)	(96,817)	(97,095)
Total	$ 350,438	$ 332,311	$ 335,092

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Income Taxes - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended		12 Months Ended
	Sep. 13, 2013	Sep. 30, 2013	Sep. 30, 2012 Tax Year 2006	Sep. 30, 2014 Unrecognized tax benefits Maximum
Income Tax Contingency
Reduction in noncurrent deferred tax assets	$ (2,100,000)
Estimated unrecognized tax benefits, decrease as a result of tax position taken in prior years		4,336,000		1,828,000
Unrecognized tax benefits that would impact effective tax rate		5,736,000
Refund of federal tax and interest			$ 1,626,000

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Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax effect	$ (111)	$ (103)	$ (326)	$ (304)
Tax effect	(1,566)	(1,026)	(2,605)	(2,859)
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,555	1,608	6,782	5,178
Accumulated Defined Benefit Plans Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,387	1,451	6,285	4,714
Accumulated Defined Benefit Plans Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Settlement charge	729	255	729	779
Prior service credit	(702)	(704)	(2,104)	(2,092)
Actuarial loss	3,926	2,849	11,779	9,111
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Total	3,953	2,400	10,404	7,798
Tax effect	(1,566)	(949)	(4,119)	(3,084)
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,387	1,451	6,285	4,714
Accumulated Net Gain Loss From Terminated Forward Starting Interest Rate Swap
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss, net of tax	168	157	497	464
Accumulated Net Gain Loss From Terminated Forward Starting Interest Rate Swap | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Additional interest expense	279	260	823	768
Tax effect	(111)	(103)	(326)	(304)
Amounts reclassified from accumulated other comprehensive loss, net of tax	$ 168	$ 157	$ 497	$ 464

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Commitments and Contingencies - Additional Information (Detail) (USD $)	9 Months Ended		1 Months Ended	9 Months Ended
	Sep. 30, 2013	Aug. 31, 2013 Revolving Line Of Credit Expires In July 2013	Aug. 31, 2013 Revolving Line Of Credit Expires In August 2015	Sep. 30, 2013 Loan Due May 2016
Commitments and Contingencies [Line Items]
Guarantee of affiliate's obligations		$ 24,000,000	$ 24,000,000
Line of credit maturity period			2015-08
Loan to affiliate	$ 3,402,000			$ 3,402,000
Loan to affiliate, due date				2016-05

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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2013

Components of Change in Other Assets and Liabilities, Net

The components of the change in other assets and liabilities, net, are as follows:

	Nine Months Ended September 30,
	2013		2012
	(Dollars in Thousands)
Other current and noncurrent assets	$	(42)	$	(9,694)
Accrued salaries, benefits and payroll taxes		(1,307)		(1,270)
Accrued insurance and other taxes		5,761		7,767
Accrued income taxes		18,369		7,817
Accrued pension, postretirement and postemployment benefits		(10,431)		(14,693)
Other current and noncurrent liabilities		13,228		14,956
	$	25,578	$	4,883

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities:
Consolidated net earnings	$ 84,276	$ 63,803
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	130,097	132,985
Stock-based compensation expense	5,408	5,947
Gains on divestitures and sales of assets	(1,003)	(858)
Deferred income taxes	19,194	11,577
Excess tax benefits from stock-based compensation transactions	(1,990)
Other items, net	(739)	2,314
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(108,134)	(93,198)
Inventories, net	(14,771)	(12,486)
Accounts payable	27,729	7,077
Other assets and liabilities, net	25,578	4,883
Net Cash Provided by Operating Activities	165,645	122,044
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(102,342)	(105,941)
Acquisitions, net	(64,432)	(132)
Proceeds from divestitures and sales of assets	3,208	7,871
Loan to affiliate	(3,402)
Net Cash Used for Investing Activities	(166,968)	(98,202)
Cash Flows from Financing Activities:
Borrowings of long-term debt	355,500	181,000
Repayments of long-term debt	(290,192)	(142,651)
Debt issuance costs	(510)	(300)
Change in bank overdraft	10,437	102
Dividends paid	(55,626)	(55,302)
Distributions to owners of noncontrolling interests		(800)
Issuances of common stock	11,571	3,508
Excess tax benefits from stock-based compensation transactions	1,990
Net Cash Provided by (Used for) Financing Activities	33,170	(14,443)
Net Increase in Cash and Cash Equivalents	31,847	9,399
Cash and Cash Equivalents, beginning of period	25,394	26,022
Cash and Cash Equivalents, end of period	57,241	35,421
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	28,621	29,255
Cash refunds for income taxes	$ 1,432	$ 3,170

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Significant Accounting Policies

9 Months Ended

Sep. 30, 2013

Significant Accounting Policies

1. Significant Accounting Policies

Organization

Martin Marietta Materials, Inc., (the “Corporation”) is engaged principally in the construction aggregates business. The Corporation’s aggregates product line, which accounted for 71% of consolidated 2012 net sales, includes crushed stone, sand and gravel, and is used primarily for construction of highways and other infrastructure projects, and in the nonresidential and residential construction industries. Aggregates products are also used in the railroad, environmental, utility and agricultural industries. These aggregates products, along with the asphalt products, ready mixed concrete and road paving construction services of the Corporation’s vertically-integrated operations (which accounted for 18% of consolidated 2012 net sales), are sold and shipped from a network of 303 quarries, distribution facilities and plants to customers in 33 states, Canada, the Bahamas and the Caribbean Islands. The aggregates and vertically-integrated operations are reported collectively as the Corporation’s “Aggregates business”.

Effective January 1, 2013, the Corporation reorganized the operations and management reporting structure of its Aggregates business, resulting in a change to its reportable segments. The Corporation currently conducts its Aggregates business through three reportable segments as follows:

AGGREGATES BUSINESS
Reportable Segments	Mid-America Group	Southeast Group	West Group
Operating Locations	Indiana, Iowa, Kentucky, Maryland, Minnesota, eastern Nebraska, North Dakota, North Carolina, Ohio, South Carolina, Virginia, Washington and West Virginia	Alabama, Florida, Georgia, Mississippi, Tennessee, Nova Scotia and the Bahamas	Arkansas, Colorado, Kansas, Louisiana, Missouri, western Nebraska, Nevada, Oklahoma, Texas, Utah and Wyoming

In addition to the Aggregates business, the Corporation has a Specialty Products segment, accounting for 11% of consolidated 2012 net sales, which produces magnesia-based chemicals products used in industrial, agricultural and environmental applications and dolomitic lime sold primarily to customers in the steel industry.

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Corporation have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and in Article 10 of Regulation S-X. The Corporation has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012, filed with the Securities and Exchange Commission on February 22, 2013. In the opinion of management, the interim consolidated financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of the results of operations, financial position and cash flows for the interim periods. The consolidated results of operations for the three and nine months ended September 30, 2013 are not indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by generally accepted accounting principles for complete financial statements. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012.

Reclassifications

Prior-year segment information for the Aggregates business presented in Note 9 has been reclassified to conform to the presentation of the Corporation’s current reportable segments.

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss

Consolidated comprehensive earnings/loss for the Corporation consist of consolidated net earnings or loss; adjustments for the funded status of pension and postretirement benefit plans; foreign currency translation adjustments; and the amortization of the value of terminated forward starting interest rate swap agreements into interest expense.

Comprehensive earnings attributable to Martin Marietta Materials, Inc. are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings attributable to Martin Marietta Materials, Inc.	$	71,836	$	62,922	$	85,304	$	62,940
Other comprehensive earnings, net of tax		3,548		3,160		3,459		6,410
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	$	75,384	$	66,082	$	88,763	$	69,350

Comprehensive earnings (loss) attributable to noncontrolling interests, consisting of net earnings or loss and adjustments for the funded status of pension and postretirement benefit plans, are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings (loss) attributable to noncontrolling interests	$	202	$	747	$	(1,028)	$	863
Other comprehensive earnings, net of tax		3		3		8		10
Comprehensive earnings (loss) attributable to noncontrolling interests	$	205	$	750	$	(1,020)	$	873

Changes in accumulated other comprehensive earnings, net of tax, are as follows:

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Three Months Ended September 30, 2013
Balance at beginning of period	$	(106,603)	$	4,153	$	(3,808)	$	(106,258)
Other comprehensive earnings before reclassifications, net of tax		--		993		--		993
Amounts reclassified from accumulated other comprehensive loss, net of tax		2,387		--		168		2,555
Other comprehensive earnings, net of tax		2,387		993		168		3,548
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Three Months Ended September 30, 2012
Balance at beginning of period	$	(81,407)	$	5,222	$	(4,455)	$	(80,640)
Other comprehensive earnings before reclassifications, net of tax		117		1,435		--		1,552
Amounts reclassified from accumulated other comprehensive loss, net of tax		1,451		--		157		1,608
Other comprehensive earnings, net of tax		1,568		1,435		157		3,160
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Other comprehensive loss before reclassifications for pension and postretirement benefit plans is net of tax of $0 and $77,000 for the three months ended September 30, 2013 and 2012, respectively.

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	(108,189)	$	6,157	$	(4,137)	$	(106,169)
Other comprehensive loss before reclassifications, net of tax		(2,312)		(1,011)		--		(3,323)
Amounts reclassified from accumulated other comprehensive loss, net of tax		6,285		--		497		6,782
Other comprehensive earnings (loss), net of tax		3,973		(1,011)		497		3,459
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Nine Months Ended September 30, 2012
Balance at beginning of period	$	(84,204)	$	5,076	$	(4,762)	$	(83,890)
Other comprehensive (loss) earnings before reclassifications, net of tax		(349)		1,581		--		1,232
Amounts reclassified from accumulated other comprehensive loss, net of tax		4,714		--		464		5,178
Other comprehensive earnings, net of tax		4,365		1,581		464		6,410
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Other comprehensive loss before reclassifications for pension and postretirement benefit plans is net of tax of $1,514,000 and $225,000 for the nine months ended September 30, 2013 and 2012, respectively.

Changes in net noncurrent deferred tax assets recorded in accumulated other comprehensive loss are as follows:

	(Dollars in Thousands)
	Pension and Postretirement Benefit Plans			Unamortized Value of Terminated Forward Starting Interest Rate Swap			Net Noncurrent Deferred Tax Assets
		Three Months Ended September 30, 2013
Balance at beginning of period	$	69,842		$	2,492		$	72,334
Tax effect of other comprehensive earnings		(1,566	)		(111	)		(1,677	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Three Months Ended September 30, 2012
Balance at beginning of period	$	53,328		$	2,915		$	56,243
Tax effect of other comprehensive earnings		(1,026	)		(103	)		(1,129	)
Balance at end of period	$	52,302		$	2,812		$	55,114
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	70,881		$	2,707		$	73,588
Tax effect of other comprehensive earnings		(2,605	)		(326	)		(2,931	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Nine Months Ended September 30, 2012
Balance at beginning of period	$	55,161		$	3,116		$	58,277
Tax effect of other comprehensive earnings		(2,859	)		(304	)		(3,163	)
Balance at end of period	$	52,302		$	2,812		$	55,114

Reclassifications out of accumulated other comprehensive loss are as follows:

	Three Months Ended September  30,						Nine Months Ended September  30,						Affected line items in the consolidated financial statements
	2013			2012			2013			2012
		(Dollars in Thousands)
Pension and postretirement benefit plans
Settlement charge	$	729		$	255		$	729		$	779
Amortization of:
Prior service credit		(702	)		(704	)		(2,104	)		(2,092	)
Actuarial loss		3,926			2,849			11,779			9,111
		3,953			2,400			10,404			7,798		Cost of sales; Selling, general & administrative expenses
Tax effect		(1,566	)		(949	)		(4,119	)		(3,084	)	Deferred income taxes
	$	2,387		$	1,451		$	6,285		$	4,714
Unamortized value of terminated forward starting interest rate swap
Additional interest expense	$	279		$	260		$	823		$	768		Interest expense
Tax effect		(111	)		(103	)		(326	)		(304	)	Deferred income taxes
	$	168		$	157		$	497		$	464

Earnings per Common Share

The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta Materials, Inc., reduced by dividends and undistributed earnings attributable to the Corporation’s unvested restricted stock awards and incentive stock awards. If there is a net loss, no amount of the undistributed loss is attributed to unvested participating securities. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Corporation’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive.

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(In Thousands)
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	72,107	$	63,241	$	85,758	$	63,907
Less: Distributed and undistributed earnings attributable to unvested awards		265		336		374		386
Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		71,842		62,905		85,384		63,521
Basic and diluted net loss available to common shareholders from discontinued operations		(271)		(319)		(454)		(967)
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	71,571	$	62,586	$	84,930	$	62,554
Basic weighted-average common shares outstanding		46,244		45,860		46,134		45,792
Effect of dilutive employee and director awards		105		132		127		137
Diluted weighted-average common shares outstanding		46,349		45,992		46,261		45,929

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Long-Term Debt

9 Months Ended

Sep. 30, 2013

Long-Term Debt

4. Long-Term Debt

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
6.6% Senior Notes, due 2018	$	298,837	$	298,677	$	298,626
7% Debentures, due 2025		124,464		124,443		124,437
6.25% Senior Notes, due 2037		228,139		228,114		228,105
Term Loan Facility, due 2015, interest rate of 2.18% at September 30, 2013; 2.21% at December 31, 2012; and 1.87% at September 30, 2012		240,000		245,000		245,000
Revolving Facility, interest rate of 1.88% at September 30, 2013; 1.91% at December 31, 2012; and 1.62% at September 30, 2012		70,000		50,000		100,000
Trade Receivable Facility, interest rate of 0.78% at September 30, 2013		150,000		--		--
AR Credit Facility, interest rate of 1.00% at December 31, 2012 and September 30, 2012		--		100,000		100,000
Other notes		1,921		1,625		2,620
Total debt		1,113,361		1,047,859		1,098,788
Less current maturities		(6,169)		(5,676)		(6,671)
Long-term debt	$	1,107,192	$	1,042,183	$	1,092,117

The Corporation’s $100,000,000 secured accounts receivable credit facility (the “AR Credit Facility”) expired by its own terms on April 20, 2013.

On April 19, 2013, the Corporation, through a wholly-owned consolidated special purpose subsidiary, established a $150,000,000 trade receivable securitization facility with SunTrust Bank and certain other lenders that may become a party to the facility from time to time (the “Trade Receivable Facility”). The Trade Receivable Facility is backed by trade receivables originated by the Corporation, which the Corporation then sells to the wholly-owned consolidated special purpose subsidiary - the balance of which was $314,998,000 at September 30, 2013. Borrowings under the Trade Receivable Facility bear interest at a rate equal to one-month LIBOR plus 0.6% and are limited to the lesser of the facility limit or of “eligible” receivables, as defined. The Corporation continues to be responsible for the servicing and administration of the receivables purchased by the wholly-owned consolidated special purpose subsidiary. The Corporation has the option to request an increase in the commitment amount by up to an additional $100,000,000, in increments of no less than $25,000,000, subject to receipt of lender commitments for the increased amount. The Trade Receivable Facility matures on April 19, 2014. At September 30, 2013, outstanding borrowings under the Trade Receivable Facility were classified as long-term on the consolidated balance sheet as the Corporation has the intent and ability to refinance amounts outstanding. The Trade Receivable Facility contains a cross-default provision to the Corporation’s other debt agreements.

The Corporation’s Credit Agreement, consisting of a $250,000,000 senior unsecured term loan (the “Term Loan Facility”) and a $350,000,000 senior unsecured revolving facility (the “Revolving Facility”), requires the Corporation’s ratio of consolidated debt to consolidated earnings before interest, taxes, depreciation, depletion and amortization (EBITDA), as defined, for the trailing twelve month period (the “Ratio”) to not exceed 3.50x as of the end of any fiscal quarter, provided that the Corporation may exclude from the Ratio debt incurred in connection with certain acquisitions for a period of 210 days so long as the Corporation maintains specified ratings on its long-term unsecured debt and the Ratio calculated without such exclusion does not exceed 3.75x. Additionally, if no amounts are outstanding under the Revolving Facility, consolidated debt, including debt for which the Corporation is a co-borrower, may be reduced by the Corporation’s unrestricted cash and cash equivalents in excess of $50,000,000, such reduction not to exceed $200,000,000, for purposes of the covenant calculation. The Corporation was in compliance with this Ratio at September 30, 2013.

Available borrowings under the Revolving Facility are reduced by any outstanding letters of credit issued by the Corporation under the Revolving Facility. At September 30, 2013, the Corporation had $2,507,000 of outstanding letters of credit issued under the Revolving Facility.

Accumulated other comprehensive loss includes the unamortized value of terminated forward starting interest rate swap agreements. For the three and nine months ended September 30, 2013, the Corporation recognized $279,000 and $823,000, respectively, as additional interest expense. For the three and nine months ended September 30, 2012, the Corporation recognized $260,000 and $768,000, respectively, as additional interest expense. The ongoing amortization of the terminated value of the forward starting interest rate swap agreements will increase annual interest expense by approximately $1,000,000 until the maturity of the 6.6% Senior Notes in 2018.

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Business Combinations and Discontinued Operations

9 Months Ended

Sep. 30, 2013

Business Combinations and Discontinued Operations

2. Business Combinations and Discontinued Operations

Business Combinations

On July 1, 2013, the Corporation acquired three aggregates quarries in the greater Atlanta, Georgia area. This transaction provides over 800 million tons of aggregates reserves and enhances the Corporation’s existing long-term position in this market. The operating results of the acquired locations are reported through the Corporation’s Southeast Group in the financial statements starting from the date of acquisition and the measurement period remains open.

Divestitures and Permanent Closures

Operations that are disposed of or permanently shut down represent discontinued operations, and, therefore, the results of their operations through the dates of disposal and any gain or loss on disposals are included in discontinued operations in the consolidated statements of earnings and comprehensive earnings. The results of operations for divestitures do not include Corporate overhead that was allocated during the periods the Corporation owned these operations. All discontinued operations relate to the Aggregates business.

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Unrecognized Tax Benefits Excluding Interest Correlative Effects and Indirect Benefits (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Reconciliation of Unrecognized Tax Benefits
Unrecognized tax benefits at beginning of period	$ 15,380
Gross increases - tax positions in prior years	4,520
Gross decreases - tax positions in prior years	(4,336)
Gross increases - tax positions in current year	1,176
Settlements with taxing authorities	(8,599)
Lapse of statute of limitations	(1,691)
Unrecognized tax benefits at end of period	$ 6,450

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Comprehensive Earnings Attributable to Noncontrolling Interests (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Comprehensive Income (Loss)
Net earnings (loss) attributable to noncontrolling interests	$ 202	$ 747	$ (1,028)	$ 863
Other comprehensive earnings, net of tax	3	3	8	10
Comprehensive earnings (loss) attributable to noncontrolling interests	$ 205	$ 750	$ (1,020)	$ 873

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Basic and Diluted Earnings Per Common Share (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Earnings Per Share, Basic and Diluted, by Common Class
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$ 72,107	$ 63,241	$ 85,758	$ 63,907
Less: Distributed and undistributed earnings attributable to unvested awards	265	336	374	386
Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.	71,842	62,905	85,384	63,521
Basic and diluted net loss available to common shareholders from discontinued operations	(271)	(319)	(454)	(967)
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$ 71,571	$ 62,586	$ 84,930	$ 62,554
Basic weighted-average common shares outstanding	46,244	45,860	46,134	45,792
Effect of dilutive employee and director awards	105	132	127	137
Diluted weighted-average common shares outstanding	46,349	45,992	46,261	45,929

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Long-Term Debt - Additional information (Detail) (USD $)	3 Months Ended		9 Months Ended								9 Months Ended	1 Months Ended		1 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Including Acquisition Bridge Debt	Sep. 30, 2013 Excluding Acquisition Bridge Debt	Sep. 30, 2013 Unrestricted Cash Reduction Minimum	Sep. 30, 2013 Unrestricted Cash Reduction Maximum	Sep. 30, 2013 6.6% Senior Notes, Due 2018	Sep. 30, 2013 Revolving Facility	Sep. 30, 2013 AR Credit Facility	Apr. 30, 2013 Trade Receivable Credit Facility	Sep. 30, 2013 Trade Receivable Credit Facility	Apr. 30, 2013 Trade Receivable Credit Facility London Interbank Offered Rate(LIBOR)	Apr. 30, 2013 Trade Receivable Credit Facility Minimum	Sep. 30, 2013 Term Loan Facility
Debt Instrument
Credit facility commitment										$ 350,000,000	$ 100,000,000		$ 314,998,000			$ 250,000,000
Debt instrument maturity period											2013-04-20
Trade receivable securitization facility												150,000,000
Credit facility, LIBOR plus rate														0.60%
Credit facility, additional commitment amount												100,000,000			25,000,000
Credit facility, maturity date												Apr. 19, 2014
Debt covenant					3.50x	3.75x
Reduction of consolidated debt in the debt ratio calculation							50,000,000
Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation								200,000,000
Outstanding letters of credit										2,507,000
Additional interest expense	279,000	260,000	823,000	768,000
Increase in annual interest expense due to ongoing amortization of the terminated value of the swap agreements									$ 1,000,000

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Financial Data for Continuing Operations for Corporations Reportable Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Total revenues	$ 665,320	$ 592,268	$ 1,610,555	$ 1,529,643
Net Sales	600,457	537,507	1,451,848	1,376,944
Earnings (Loss) from operations	108,843	91,533	155,157	115,944
Total Aggregates Business
Segment Reporting Information [Line Items]
Total revenues	604,704	538,195	1,428,366	1,364,018
Net Sales	544,663	488,060	1,284,253	1,225,318
Earnings (Loss) from operations	97,335	76,571	125,795	109,162
Specialty Products
Segment Reporting Information [Line Items]
Total revenues	60,616	54,073	182,189	165,625
Net Sales	55,794	49,447	167,595	151,626
Earnings (Loss) from operations	17,267	17,034	53,071	52,706
Mid-America Group
Segment Reporting Information [Line Items]
Total revenues	237,696	212,164	555,823	538,881
Net Sales	216,361	194,128	508,999	493,453
Earnings (Loss) from operations	66,419	56,357	102,342	94,959
Southeast Group
Segment Reporting Information [Line Items]
Total revenues	69,491	61,369	185,676	184,448
Net Sales	64,871	57,021	171,456	171,027
Earnings (Loss) from operations	(1,386)	(3,452)	(14,949)	(14,980)
West Group
Segment Reporting Information [Line Items]
Total revenues	297,517	264,662	686,867	640,689
Net Sales	263,431	236,911	603,798	560,838
Earnings (Loss) from operations	32,302	23,666	38,402	29,183
Corporate
Segment Reporting Information [Line Items]
Earnings (Loss) from operations	$ (5,759)	$ (2,072)	$ (23,709)	$ (45,924)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01

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Pension and Postretirement Benefits

9 Months Ended

Sep. 30, 2013

Pension and Postretirement Benefits

7. Pension and Postretirement Benefits

The estimated components of the recorded net periodic benefit cost (credit) for pension and postretirement benefits are as follows:

	Three Months Ended September 30,
	Pension						Postretirement Benefits
	2013			2012			2013			2012
		(Dollars in Thousands)
Service cost	$	4,030		$	3,074		$	57		$	57
Interest cost		5,756			5,561			253			309
Expected return on assets		(6,668	)		(5,617	)		--			--
Amortization of:
Prior service cost (credit)		112			110			(814	)		(814	)
Actuarial loss (gain)		3,920			2,920			6			(71	)
Settlement charge		729			255			--			--
Net periodic benefit cost (credit)	$	7,879		$	6,303		$	(498	)	$	(519	)

	Nine Months Ended September 30,
	Pension						Postretirement Benefits
	2013			2012			2013			2012
		(Dollars in Thousands)
Service cost	$	12,091		$	9,813		$	170		$	171
Interest cost		17,268			17,754			760			926
Expected return on assets		(20,003	)		(17,935	)		--			--
Amortization of:
Prior service cost (credit)		337			350			(2,441	)		(2,442	)
Actuarial loss (gain)		11,760			9,323			19			(212	)
Settlement charge		729			779			--			--
Net periodic benefit cost (credit)	$	22,182		$	20,084		$	(1,492	)	$	(1,557	)

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CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Loss on discontinued operations, related tax benefit	$ 185	$ 371	$ 250	$ 547

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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Current Assets:
Cash and cash equivalents	$ 57,241	$ 25,394	$ 35,421
Accounts receivable, net	331,030	224,050	296,947
Inventories, net	350,438	332,311	335,092
Current deferred income taxes	77,005	77,716	79,758
Other current assets	29,955	40,930	37,889
Total Current Assets	845,669	700,401	785,107
Property, plant and equipment	3,942,138	3,812,587	3,775,320
Allowances for depreciation, depletion and amortization	(2,159,520)	(2,059,346)	(2,024,379)
Net property, plant and equipment	1,782,618	1,753,241	1,750,941
Goodwill	616,634	616,204	615,986
Other intangibles, net	49,035	50,433	51,330
Other noncurrent assets	43,149	40,647	39,840
Total Assets	3,337,105	3,160,926	3,243,204
Current Liabilities:
Bank overdraft	10,437		102
Accounts payable	111,266	83,537	99,628
Accrued salaries, benefits and payroll taxes	20,655	19,461	17,436
Pension and postretirement benefits	1,992	6,851	6,442
Accrued insurance and other taxes	34,444	28,682	34,175
Income taxes	1,720	287	13,291
Current maturities of long-term debt and short-term facilities	6,169	5,676	6,671
Accrued interest	18,158	7,490	18,209
Other current liabilities	21,591	21,351	21,155
Total Current Liabilities	226,432	173,335	217,109
Long-term debt	1,107,192	1,042,183	1,092,117
Pension, postretirement and postemployment benefits	171,695	183,122	135,761
Noncurrent deferred income taxes	243,858	225,592	243,759
Other noncurrent liabilities	89,045	86,395	84,437
Total Liabilities	1,838,222	1,710,627	1,773,183
Equity:
Common stock, par value $0.01 per share	461	459	458
Preferred stock, par value $0.01 per share
Additional paid-in capital	431,122	414,657	408,898
Accumulated other comprehensive loss	(102,710)	(106,169)	(77,480)
Retained earnings	1,131,276	1,101,598	1,098,529
Total Shareholders' Equity	1,460,149	1,410,545	1,430,405
Noncontrolling interests	38,734	39,754	39,616
Total Equity	1,498,883	1,450,299	1,470,021
Total Liabilities and Equity	$ 3,337,105	$ 3,160,926	$ 3,243,204

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Changes in Accumulated Other Comprehensive Earnings Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$ (106,258)	$ (80,640)	$ (106,169)	$ (83,890)
Other comprehensive (loss) earnings before reclassifications, net of tax	993	1,552	(3,323)	1,232
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,555	1,608	6,782	5,178
Other comprehensive earnings (loss), net of tax	3,548	3,160	3,459	6,410
Balance at end of period	(102,710)	(77,480)	(102,710)	(77,480)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	(106,603)	(81,407)	(108,189)	(84,204)
Other comprehensive (loss) earnings before reclassifications, net of tax		117	(2,312)	(349)
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,387	1,451	6,285	4,714
Other comprehensive earnings (loss), net of tax	2,387	1,568	3,973	4,365
Balance at end of period	(104,216)	(79,839)	(104,216)	(79,839)
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	4,153	5,222	6,157	5,076
Other comprehensive (loss) earnings before reclassifications, net of tax	993	1,435	(1,011)	1,581
Other comprehensive earnings (loss), net of tax	993	1,435	(1,011)	1,581
Balance at end of period	5,146	6,657	5,146	6,657
Accumulated Net Gain Loss From Terminated Forward Starting Interest Rate Swap
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	(3,808)	(4,455)	(4,137)	(4,762)
Amounts reclassified from accumulated other comprehensive loss, net of tax	168	157	497	464
Other comprehensive earnings (loss), net of tax	168	157	497	464
Balance at end of period	$ (3,640)	$ (4,298)	$ (3,640)	$ (4,298)

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Pension and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Components of Net Periodic Benefit Cost

The estimated components of the recorded net periodic benefit cost (credit) for pension and postretirement benefits are as follows:

	Three Months Ended September 30,
	Pension						Postretirement Benefits
	2013			2012			2013			2012
		(Dollars in Thousands)
Service cost	$	4,030		$	3,074		$	57		$	57
Interest cost		5,756			5,561			253			309
Expected return on assets		(6,668	)		(5,617	)		--			--
Amortization of:
Prior service cost (credit)		112			110			(814	)		(814	)
Actuarial loss (gain)		3,920			2,920			6			(71	)
Settlement charge		729			255			--			--
Net periodic benefit cost (credit)	$	7,879		$	6,303		$	(498	)	$	(519	)

	Nine Months Ended September 30,
	Pension						Postretirement Benefits
	2013			2012			2013			2012
		(Dollars in Thousands)
Service cost	$	12,091		$	9,813		$	170		$	171
Interest cost		17,268			17,754			760			926
Expected return on assets		(20,003	)		(17,935	)		--			--
Amortization of:
Prior service cost (credit)		337			350			(2,441	)		(2,442	)
Actuarial loss (gain)		11,760			9,323			19			(212	)
Settlement charge		729			779			--			--
Net periodic benefit cost (credit)	$	22,182		$	20,084		$	(1,492	)	$	(1,557	)

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Business Segments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013 Segment
Segment Reporting Information [Line Items]
Reportable business segments	3

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Schedule of Estimated Effective Income Tax Rate (Detail)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Income Taxes
Continuing operations	25.90%	16.20%
Discontinued operations	35.50%	36.10%
Consolidated overall	25.80%	15.80%

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Long Term Debt (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Debt Instrument
Total debt	$ 1,113,361,000	$ 1,047,859,000	$ 1,098,788,000
Less current maturities	(6,169,000)	(5,676,000)	(6,671,000)
Long-term debt	1,107,192,000	1,042,183,000	1,092,117,000
6.6% Senior Notes, Due 2018
Debt Instrument
Total debt	298,837,000	298,677,000	298,626,000
7% Debentures, Due 2025
Debt Instrument
Total debt	124,464,000	124,443,000	124,437,000
6.25% Senior Notes, Due 2037
Debt Instrument
Total debt	228,139,000	228,114,000	228,105,000
Term Loan Facility, Due 2015
Debt Instrument
Total debt	240,000,000	245,000,000	245,000,000
Revolving Facility
Debt Instrument
Credit Facility	70,000,000	50,000,000	100,000,000
Trade Receivable Credit Facility
Debt Instrument
Credit Facility	150,000,000
AR Credit Facility
Debt Instrument
Credit Facility		100,000,000	100,000,000
Other notes
Debt Instrument
Other notes	$ 1,921,000	$ 1,625,000	$ 2,620,000

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Long Term Debt (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
6.6% Senior Notes, Due 2018
Debt Instrument
Maturity date	2018
Interest rate on notes	6.60%
7% Debentures, Due 2025
Debt Instrument
Maturity date	2025
Interest rate on notes	7.00%
6.25% Senior Notes, Due 2037
Debt Instrument
Maturity date	2037
Interest rate on notes	6.25%
Term Loan Facility, Due 2015
Debt Instrument
Maturity date	2015
Interest rate on term loan	2.18%	2.21%	1.87%
Revolving Facility
Debt Instrument
Credit Facility interest rate	1.88%	1.91%	1.62%
Trade Receivable Credit Facility
Debt Instrument
Credit Facility interest rate	0.78%
AR Credit Facility
Debt Instrument
Credit Facility interest rate		1.00%	1.00%

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Income Taxes

9 Months Ended

Sep. 30, 2013

Income Taxes

6. Income Taxes

	Nine Months Ended September 30,
	2013		2012
Estimated effective income tax rate:
Continuing operations		25.9%		16.2%
Discontinued operations		35.5%		36.1%
Consolidated overall		25.8%		15.8%

The Corporation’s effective income tax rate reflects the effect of federal and state income taxes and the impact of differences in book and tax accounting arising from the net permanent benefits associated with the statutory depletion deduction for mineral reserves, the impact of foreign losses for which no tax benefit was realized and the domestic production deduction. The effective income tax rates for discontinued operations reflect the tax effects of individual operations’ transactions and are not indicative of the Corporation’s overall effective income tax rate.

On September 13, 2013, the U.S. Treasury Department and Internal Revenue Service issued final regulations addressing costs incurred in acquiring, producing or improving tangible property (the “tangible property regulations”). The tangible property regulations are generally effective for tax years beginning on or after January 1, 2014, and may be adopted in earlier years. The Corporation intends to early adopt the tax treatment of expenditures to improve tangible property and the capitalization of inherently facilitative costs to acquire tangible property as of January 1, 2013. The estimated tax impact of these accounting method changes reduces noncurrent deferred tax assets in the amount of $2,100,000, with a corresponding reduction in current taxes payable, and has been reflected in the consolidated balance sheet as of September 30, 2013. The tangible property regulations will require the Corporation to make additional tax accounting method changes as of January 1, 2014; however, management does not anticipate the impact of these changes to be material to the Corporation’s consolidated financial position and/or results of operations.

The Corporation’s unrecognized tax benefits, excluding interest, correlative effects and indirect benefits, are as follows:

	Nine Months Ended September 30, 2013
		(Dollars in Thousands)
Unrecognized tax benefits at beginning of period		$        15,380
Gross increases – tax positions in prior years		4,520
Gross decreases – tax positions in prior years		(4,336)
Gross increases – tax positions in current year		1,176
Settlements with taxing authorities		(8,599)
Lapse of statute of limitations		(1,691)
Unrecognized tax benefits at end of period		$          6,450

In August 2013, the Corporation filed the required amended returns and paid the tax due to settle the Advance Pricing Agreement (“APA”) it has with Canada that increased the sales price charged for intercompany shipments from Canada to the United States during the years 2005 through 2011. The Corporation also filed amended returns in the United States for the years 2005 through 2011 to request the compensating refunds allowed pursuant to the corresponding APA with the United States.

The Corporation anticipates that it is reasonably possible that unrecognized tax benefits may decrease up to $1,828,000 during the twelve months ending September 30, 2014 as a result of the expiration of the statute of limitations for the 2010 tax year.

At September 30, 2013, unrecognized tax benefits of $5,736,000 related to permanent income tax differences, net of federal tax expense, would have favorably affected the Corporation’s effective income tax rate if recognized.

The consolidated overall estimated effective income tax rate for the nine months ended September 30, 2012 included the estimated effects of the APA and a refund of federal tax and interest of $1,626,000 related to the 2006 tax year.

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Noncurrent Deferred Tax Assets Recorded in Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period, Pension and Postretirement Benefit Plans	$ 69,842	$ 53,328	$ 70,881	$ 55,161
Other comprehensive earnings, tax effect, Pension and Postretirement Benefit Plans	(1,566)	(1,026)	(2,605)	(2,859)
Balance at end of period, Pension and Postretirement Benefit Plans	68,276	52,302	68,276	52,302
Balance at beginning of period, Unamortized Value of Terminated Forward Starting Interest Rate Swap	2,492	2,915	2,707	3,116
Other comprehensive earnings, tax effect, Unamortized Value of Terminated Forward Starting Interest Rate Swap	(111)	(103)	(326)	(304)
Balance at end of period, Unamortized Value of Terminated Forward Starting Interest Rate Swap	2,381	2,812	2,381	2,812
Balance at beginning of period, Net Non current Deferred Tax Assets	72,334	56,243	73,588	58,277
Other comprehensive earnings, tax effect, Net Non current Deferred Tax Assets	(1,677)	(1,129)	(2,931)	(3,163)
Balance at end of period, Net Non current Deferred Tax Assets	$ 70,657	$ 55,114	$ 70,657	$ 55,114

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Components of Net Periodic Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service cost	$ 4,030	$ 3,074	$ 12,091	$ 9,813
Interest cost	5,756	5,561	17,268	17,754
Expected return on assets	(6,668)	(5,617)	(20,003)	(17,935)
Prior service cost (credit)	112	110	337	350
Actuarial loss (gain)	3,920	2,920	11,760	9,323
Settlement charge	729	255	729	779
Net periodic benefit cost (credit)	7,879	6,303	22,182	20,084
Postretirement Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service cost	57	57	170	171
Interest cost	253	309	760	926
Prior service cost (credit)	(814)	(814)	(2,441)	(2,442)
Actuarial loss (gain)	6	(71)	19	(212)
Net periodic benefit cost (credit)	$ (498)	$ (519)	$ (1,492)	$ (1,557)

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Business Segments

9 Months Ended

Sep. 30, 2013

Business Segments

9. Business Segments

The Corporation conducts its aggregates and vertically-integrated operations through three reportable business segments: Mid-America Group, Southeast Group and West Group. The Corporation also has a Specialty Products segment that includes magnesia-based chemicals products and dolomitic lime.

The following tables display selected financial data for continuing operations for the Corporation’s reportable business segments. Corporate loss from operations primarily includes depreciation on capitalized interest, expenses for corporate administrative functions, unallocated corporate expenses and other nonrecurring and/or non-operational adjustments. Prior-year segment information has been reclassified to conform to the presentation of the Corporation’s current reportable segments.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Total revenues:
Mid-America Group	$	237,696	$	212,164	$	555,823	$	538,881
Southeast Group		69,491		61,369		185,676		184,448
West Group		297,517		264,662		686,867		640,689
Total Aggregates Business		604,704		538,195		1,428,366		1,364,018
Specialty Products		60,616		54,073		182,189		165,625
Total	$	665,320	$	592,268	$	1,610,555	$	1,529,643
Net sales:
Mid-America Group	$	216,361	$	194,128	$	508,999	$	493,453
Southeast Group		64,871		57,021		171,456		171,027
West Group		263,431		236,911		603,798		560,838
Total Aggregates Business		544,663		488,060		1,284,253		1,225,318
Specialty Products		55,794		49,447		167,595		151,626
Total	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Earnings (Loss) from operations:
Mid-America Group	$	66,419	$	56,357	$	102,342	$	94,959
Southeast Group		(1,386)		(3,452)		(14,949)		(14,980)
West Group		32,302		23,666		38,402		29,183
Total Aggregates Business		97,335		76,571		125,795		109,162
Specialty Products		17,267		17,034		53,071		52,706
Corporate		(5,759)		(2,072)		(23,709)		(45,924)
Total	$	108,843	$	91,533	$	155,157	$	115,944

Assets employed for the Mid-America and West Groups have been recast since prior year as a result of the Corporation’s reorganization of the operations of its Aggregates business (see Note 1).

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
Assets employed:
Mid-America Group	$	1,161,756	$	1,036,155	$	1,074,451
Southeast Group		628,673		607,705		614,214
West Group		1,172,289		1,147,879		1,188,373
Total Aggregates Business		2,962,718		2,791,739		2,877,038
Specialty Products		153,334		157,673		154,155
Corporate		221,053		211,514		212,011
Total	$	3,337,105	$	3,160,926	$	3,243,204

The Aggregates business includes the aggregates product line, along with the asphalt, ready mixed concrete and road paving product lines of its vertically-integrated operations. All vertically-integrated operations reside in the West Group. The following tables provide net sales and gross profit by product line for the Aggregates business and are reconciled to consolidated net sales and gross profit.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net sales:
Aggregates	$	411,206	$	371,398	$	1,016,238	$	985,563
Asphalt		23,787		28,881		52,231		61,655
Ready Mixed Concrete		41,765		31,531		103,347		78,746
Road Paving		67,905		56,250		112,437		99,354
Total Aggregates Business		544,663		488,060		1,284,253		1,225,318
Specialty Products		55,794		49,447		167,595		151,626
Total	$	600,457	$	537,507	$	1,451,848	$	1,376,944
Gross profit (loss):
Aggregates	$	108,166	$	94,541	$	189,171	$	182,883
Asphalt		7,322		6,359		9,770		9,065
Ready Mixed Concrete		3,124		472		4,911		421
Road Paving		4,286		2,276		(285)		208
Total Aggregates Business		122,898		103,648		203,567		192,577
Specialty Products		19,919		19,744		60,784		59,057
Corporate		291		630		(1,426)		(1,222)
Total	$	143,108	$	124,022	$	262,925	$	250,412

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Financial Instruments

9 Months Ended

Sep. 30, 2013

Financial Instruments

5. Financial Instruments

The Corporation’s financial instruments include temporary cash investments, accounts receivable, notes receivable, bank overdraft, accounts payable, publicly-registered long-term notes, debentures and other long-term debt.

Temporary cash investments are placed primarily in money market funds, money market demand deposit accounts and Eurodollar time deposits with the following financial institutions: Branch Banking and Trust Company, Comerica Bank, Fifth Third Bank, JPMorgan Chase Bank, N.A., Regions Bank, and Wells Fargo Bank, N.A. The Corporation’s cash equivalents have maturities of less than three months. Due to the short maturity of these investments, they are carried on the consolidated balance sheets at cost, which approximates fair value.

Customer receivables are due from a large number of customers, primarily in the construction industry, and are dispersed across wide geographic and economic regions. However, customer receivables are more heavily concentrated in certain states (namely, Texas, North Carolina, Iowa, Colorado and Georgia). The estimated fair values of customer receivables approximate their carrying amounts due to the short-term nature of the receivables.

Notes receivable are primarily promissory notes with customers and are not publicly traded. Management estimates that the fair value of notes receivable approximates the carrying amount.

The bank overdraft represents amounts to be funded to financial institutions for checks that have cleared the bank. The estimated fair value of the bank overdraft approximates its carrying value.

Accounts payable represent amounts owed to suppliers and vendors. The estimated fair value of accounts payable approximates its carrying amounts due to the short-term nature of the payables.

The carrying values and fair values of the Corporation’s long-term debt were $1,113,361,000 and $1,152,906,000, respectively, at September 30, 2013; $1,047,859,000 and $1,105,650,000, respectively, at December 31, 2012; and $1,098,788,000 and $1,156,820,000, respectively, at September 30, 2012. The estimated fair value of the Corporation’s publicly-registered long-term notes was estimated based on level 1 of the fair value hierarchy using quoted market prices. The estimated fair value of other borrowings, which primarily represents variable-rate debt, approximates its carrying amount as the interest rates reset periodically.

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CONSOLIDATED STATEMENT OF TOTAL EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total Shareholders' Equity	Noncontrolling Interests
Beginning Balance at Dec. 31, 2012	$ 1,450,299	$ 459	$ 414,657	$ (106,169)	$ 1,101,598	$ 1,410,545	$ 39,754
Beginning Balance (in shares) at Dec. 31, 2012		46,002
Consolidated net earnings	84,276				85,304	85,304	(1,028)
Other comprehensive earnings	3,467			3,459		3,459	8
Dividends declared	(55,626)				(55,626)	(55,626)
Issuances of common stock for stock award plans (in shares)		246
Issuances of common stock for stock award plans	11,059	2	11,057			11,059
Stock-based compensation expense	5,408		5,408			5,408
Ending Balance at Sep. 30, 2013	$ 1,498,883	$ 461	$ 431,122	$ (102,710)	$ 1,131,276	$ 1,460,149	$ 38,734
Ending Balance (in shares) at Sep. 30, 2013		46,248

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Net Sales By Product Line (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Combination, Separately Recognized Transactions
Net Sales	$ 600,457	$ 537,507	$ 1,451,848	$ 1,376,944
Gross profit (loss)	143,108	124,022	262,925	250,412
Aggregates
Business Combination, Separately Recognized Transactions
Net Sales	411,206	371,398	1,016,238	985,563
Gross profit (loss)	108,166	94,541	189,171	182,883
Asphalt
Business Combination, Separately Recognized Transactions
Net Sales	23,787	28,881	52,231	61,655
Gross profit (loss)	7,322	6,359	9,770	9,065
Ready Mixed Concrete
Business Combination, Separately Recognized Transactions
Net Sales	41,765	31,531	103,347	78,746
Gross profit (loss)	3,124	472	4,911	421
Road Paving
Business Combination, Separately Recognized Transactions
Net Sales	67,905	56,250	112,437	99,354
Gross profit (loss)	4,286	2,276	(285)	208
Total Aggregates Business
Business Combination, Separately Recognized Transactions
Net Sales	544,663	488,060	1,284,253	1,225,318
Gross profit (loss)	122,898	103,648	203,567	192,577
Specialty Products
Business Combination, Separately Recognized Transactions
Net Sales	55,794	49,447	167,595	151,626
Gross profit (loss)	19,919	19,744	60,784	59,057
Corporate
Business Combination, Separately Recognized Transactions
Gross profit (loss)	$ 291	$ 630	$ (1,426)	$ (1,222)

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Business Combinations and Discontinued Operations - Additional Information (Detail) (Business Acquisitions)	1 Months Ended
	Jul. 31, 2013 Facility T
Business Acquisitions
Business Combination Segment Allocation [Line Items]
Aggregate quarries, reserves	800,000,000
Number of quarries acquired	3

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Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Changes in Accumulated Other Comprehensive Earnings, Net of Tax

Changes in accumulated other comprehensive earnings, net of tax, are as follows:

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Three Months Ended September 30, 2013
Balance at beginning of period	$	(106,603)	$	4,153	$	(3,808)	$	(106,258)
Other comprehensive earnings before reclassifications, net of tax		--		993		--		993
Amounts reclassified from accumulated other comprehensive loss, net of tax		2,387		--		168		2,555
Other comprehensive earnings, net of tax		2,387		993		168		3,548
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Three Months Ended September 30, 2012
Balance at beginning of period	$	(81,407)	$	5,222	$	(4,455)	$	(80,640)
Other comprehensive earnings before reclassifications, net of tax		117		1,435		--		1,552
Amounts reclassified from accumulated other comprehensive loss, net of tax		1,451		--		157		1,608
Other comprehensive earnings, net of tax		1,568		1,435		157		3,160
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

	(Dollars in Thousands)
	Pension and   Postretirement   Benefit Plans		Foreign Currency		Unamortized Value of Terminated Forward Starting Interest Rate Swap		Accumulated Other Comprehensive Loss
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	(108,189)	$	6,157	$	(4,137)	$	(106,169)
Other comprehensive loss before reclassifications, net of tax		(2,312)		(1,011)		--		(3,323)
Amounts reclassified from accumulated other comprehensive loss, net of tax		6,285		--		497		6,782
Other comprehensive earnings (loss), net of tax		3,973		(1,011)		497		3,459
Balance at end of period	$	(104,216)	$	5,146	$	(3,640)	$	(102,710)

	Nine Months Ended September 30, 2012
Balance at beginning of period	$	(84,204)	$	5,076	$	(4,762)	$	(83,890)
Other comprehensive (loss) earnings before reclassifications, net of tax		(349)		1,581		--		1,232
Amounts reclassified from accumulated other comprehensive loss, net of tax		4,714		--		464		5,178
Other comprehensive earnings, net of tax		4,365		1,581		464		6,410
Balance at end of period	$	(79,839)	$	6,657	$	(4,298)	$	(77,480)

Noncurrent Deferred Tax Assets Recorded in Accumulated Other Comprehensive Loss

Changes in net noncurrent deferred tax assets recorded in accumulated other comprehensive loss are as follows:

	(Dollars in Thousands)
	Pension and Postretirement Benefit Plans			Unamortized Value of Terminated Forward Starting Interest Rate Swap			Net Noncurrent Deferred Tax Assets
		Three Months Ended September 30, 2013
Balance at beginning of period	$	69,842		$	2,492		$	72,334
Tax effect of other comprehensive earnings		(1,566	)		(111	)		(1,677	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Three Months Ended September 30, 2012
Balance at beginning of period	$	53,328		$	2,915		$	56,243
Tax effect of other comprehensive earnings		(1,026	)		(103	)		(1,129	)
Balance at end of period	$	52,302		$	2,812		$	55,114
		Nine Months Ended September 30, 2013
Balance at beginning of period	$	70,881		$	2,707		$	73,588
Tax effect of other comprehensive earnings		(2,605	)		(326	)		(2,931	)
Balance at end of period	$	68,276		$	2,381		$	70,657
		Nine Months Ended September 30, 2012
Balance at beginning of period	$	55,161		$	3,116		$	58,277
Tax effect of other comprehensive earnings		(2,859	)		(304	)		(3,163	)
Balance at end of period	$	52,302		$	2,812		$	55,114

Reclassification Out of Accumulated Other Comprehensive Loss

Reclassifications out of accumulated other comprehensive loss are as follows:

	Three Months Ended September  30,						Nine Months Ended September  30,						Affected line items in the consolidated financial statements
	2013			2012			2013			2012
		(Dollars in Thousands)
Pension and postretirement benefit plans
Settlement charge	$	729		$	255		$	729		$	779
Amortization of:
Prior service credit		(702	)		(704	)		(2,104	)		(2,092	)
Actuarial loss		3,926			2,849			11,779			9,111
		3,953			2,400			10,404			7,798		Cost of sales; Selling, general & administrative expenses
Tax effect		(1,566	)		(949	)		(4,119	)		(3,084	)	Deferred income taxes
	$	2,387		$	1,451		$	6,285		$	4,714
Unamortized value of terminated forward starting interest rate swap
Additional interest expense	$	279		$	260		$	823		$	768		Interest expense
Tax effect		(111	)		(103	)		(326	)		(304	)	Deferred income taxes
	$	168		$	157		$	497		$	464

Basic and Diluted Earnings per Common Share

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(In Thousands)
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	72,107	$	63,241	$	85,758	$	63,907
Less: Distributed and undistributed earnings attributable to unvested awards		265		336		374		386
Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		71,842		62,905		85,384		63,521
Basic and diluted net loss available to common shareholders from discontinued operations		(271)		(319)		(454)		(967)
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	71,571	$	62,586	$	84,930	$	62,554
Basic weighted-average common shares outstanding		46,244		45,860		46,134		45,792
Effect of dilutive employee and director awards		105		132		127		137
Diluted weighted-average common shares outstanding		46,349		45,992		46,261		45,929

Parent

Comprehensive Earnings Attributable

Comprehensive earnings attributable to Martin Marietta Materials, Inc. are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings attributable to Martin Marietta Materials, Inc.	$	71,836	$	62,922	$	85,304	$	62,940
Other comprehensive earnings, net of tax		3,548		3,160		3,459		6,410
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	$	75,384	$	66,082	$	88,763	$	69,350

Noncontrolling Interest

Comprehensive Earnings Attributable

Comprehensive earnings (loss) attributable to noncontrolling interests, consisting of net earnings or loss and adjustments for the funded status of pension and postretirement benefit plans, are as follows:

	Three Months Ended September  30,				Nine Months Ended September  30,
	2013		2012		2013		2012
		(Dollars in Thousands)
Net earnings (loss) attributable to noncontrolling interests	$	202	$	747	$	(1,028)	$	863
Other comprehensive earnings, net of tax		3		3		8		10
Comprehensive earnings (loss) attributable to noncontrolling interests	$	205	$	750	$	(1,020)	$	873

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies

8. Commitments and Contingencies

Legal and Administrative Proceedings

The Corporation is engaged in certain legal and administrative proceedings incidental to its normal business activities. In the opinion of management and counsel, based upon currently-available facts, it is remote that the ultimate outcome of any litigation and other proceedings, including those pertaining to environmental matters, relating to the Corporation and its subsidiaries, will have a material adverse effect on the overall results of the Corporation’s operations, its cash flows or its financial position.

Environmental and Governmental Regulations

The United States Environmental Protection Agency (“USEPA”) includes the lime industry as a national enforcement priority under the federal Clean Air Act (“CAA”). As part of the industry wide effort, the USEPA issued Notices of Violation/Findings of Violation (“NOVs”) to the Corporation in 2010 and 2011 regarding the Corporation’s compliance with the CAA New Source Review (“NSR”) program at its Specialty Products dolomitic lime manufacturing plant in Woodville, Ohio. The Corporation has been providing information to the USEPA in response to these NOVs and has had several meetings with the USEPA. The Corporation believes it is in substantial compliance with the NSR program. Because the enforcement proceeding is in its initial stage, at this time the Corporation cannot reasonably estimate what likely penalties or upgrades to equipment might ultimately be required. The Corporation believes that any costs related to any upgrades to capital equipment will be spread over time and will not have a material adverse effect on the Corporation’s operations or its financial condition, but can give no assurance that the ultimate resolution of this matter will not have a material adverse effect on the financial condition or results of operations of the Specialty Products segment of the business.

Co-Borrower Agreement with an Unconsolidated Affiliate

The Corporation had an unconditional guaranty of payment agreement with Fifth Third Bank (“Fifth Third”) to guarantee the repayment of amounts borrowed by an unconsolidated affiliate under a $24,000,000 revolving line of credit provided by Fifth Third that was replaced in August 2013 by a new $24,000,000 revolving line of credit agreement in which the Corporation became a co-borrower with the affiliate. This new line of credit expires in August 2015. The affiliate has agreed to reimburse and indemnify the Corporation for any payments and expenses the Corporation may incur from this agreement. The Corporation holds a lien on the affiliate’s membership interest in a joint venture as collateral for payment under the revolving line of credit.

Additionally, in September 2013, the Corporation loaned $3,402,000 to this affiliate to repay in full the outstanding balance of its loan with Bank of America, N.A. and entered into a loan agreement with the affiliate for monthly repayment of principal and interest of that loan amount through May 2016. The Corporation holds a lien on the affiliate’s property as collateral for payment under the loan and security agreement.

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Estimated Effective Income Tax Rate

	Nine Months Ended September 30,
	2013		2012
Estimated effective income tax rate:
Continuing operations		25.9%		16.2%
Discontinued operations		35.5%		36.1%
Consolidated overall		25.8%		15.8%

Schedule of Unrecognized Tax Benefits

The Corporation’s unrecognized tax benefits, excluding interest, correlative effects and indirect benefits, are as follows:

	Nine Months Ended September 30, 2013
		(Dollars in Thousands)
Unrecognized tax benefits at beginning of period		$        15,380
Gross increases – tax positions in prior years		4,520
Gross decreases – tax positions in prior years		(4,336)
Gross increases – tax positions in current year		1,176
Settlements with taxing authorities		(8,599)
Lapse of statute of limitations		(1,691)
Unrecognized tax benefits at end of period		$          6,450

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Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Inventories, Net

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
Finished products	$	366,558	$	355,881	$	356,849
Products in process and raw materials		19,924		16,442		18,918
Supplies and expendable parts		61,441		56,805		56,420
		447,923		429,128		432,187
Less allowances		(97,485)		(96,817)		(97,095)
Total	$	350,438	$	332,311	$	335,092

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 30, 2013
Document Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	MLM
Entity Registrant Name	MARTIN MARIETTA MATERIALS INC
Entity Central Index Key	0000916076
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		46,248,559

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Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2013

Long-Term Debt

	September 30, 2013		December 31, 2012		September 30, 2012
		(Dollars in Thousands)
6.6% Senior Notes, due 2018	$	298,837	$	298,677	$	298,626
7% Debentures, due 2025		124,464		124,443		124,437
6.25% Senior Notes, due 2037		228,139		228,114		228,105
Term Loan Facility, due 2015, interest rate of 2.18% at September 30, 2013; 2.21% at December 31, 2012; and 1.87% at September 30, 2012		240,000		245,000		245,000
Revolving Facility, interest rate of 1.88% at September 30, 2013; 1.91% at December 31, 2012; and 1.62% at September 30, 2012		70,000		50,000		100,000
Trade Receivable Facility, interest rate of 0.78% at September 30, 2013		150,000		--		--
AR Credit Facility, interest rate of 1.00% at December 31, 2012 and September 30, 2012		--		100,000		100,000
Other notes		1,921		1,625		2,620
Total debt		1,113,361		1,047,859		1,098,788
Less current maturities		(6,169)		(5,676)		(6,671)
Long-term debt	$	1,107,192	$	1,042,183	$	1,092,117