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 ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

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

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of ~~July 28, 2021, 65,657,699~~April 29, 2022, 66,065,420 shares of the Registrant’s Common Stock, par value $.0001 per share, were outstanding.

	June 30,		December 31,		March 31,		December 31,
	2021		2020		2022		2021
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	180,767	$	216,510	$	142,583	$	145,459
Accounts receivable—net		35,741		38,990		37,162		82,953
Contract revenues in excess of billings		34,556		32,106		74,535		39,844
Inventories		32,758		34,689		30,394		30,760
Prepaid expenses and other current assets		39,330		40,398		43,368		28,416
Total current assets		323,152		362,693		328,042		327,432

PROPERTY AND EQUIPMENT—Net		422,552		383,042		468,555		455,102
OPERATING LEASE ASSETS		52,777		65,188		63,345		62,233
GOODWILL		76,576		76,576		76,576		76,576
INVENTORIES—Noncurrent		61,578		58,413		71,117		65,049
OTHER		12,998		12,112		11,204		11,278
TOTAL	$	949,633	$	958,024	$	1,018,839	$	997,670

LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	79,863	$	71,308	$	98,182	$	85,566
Accrued expenses		37,230		52,899		33,949		37,626
Operating lease liabilities		14,255		19,472		16,036		16,729
Billings in excess of contract revenues		28,833		32,608		3,687		14,814
Total current liabilities		160,181		176,287		151,854		154,735

LONG-TERM DEBT		320,696		323,735		321,108		320,971
OPERATING LEASE LIABILITIES—Noncurrent		38,877		45,879		47,839		45,986
DEFERRED INCOME TAXES		59,458		56,466		73,888		68,497
OTHER		10,324		8,989		8,746		8,484
Total liabilities		589,536		611,356		603,435		598,673

COMMITMENTS AND CONTINGENCIES (Note 8)
EQUITY:
Common stock—$.0001 par value; 90,000 authorized, 65,654 and 65,023 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively.		6		6
Common stock—$.0001 par value; 90,000 authorized, 66,046 and 65,746 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively.						6		6
Additional paid-in capital		304,977		304,757		307,597		308,482
Retained earnings		51,856		40,937		101,426		90,369
Accumulated other comprehensive income		3,258		968		6,375		140
Total equity		360,097		346,668		415,404		398,997
TOTAL	$	949,633	$	958,024	$	1,018,839	$	997,670

													Three Months Ended
	Three Months Ended						Six Months Ended						March 31,
	June 30,						June 30,						2022			2021
	2021			2020			2021			2020
Contract revenues	$	169,914		$	167,920		$	347,547		$	385,615		$	194,349		$	177,633
Costs of contract revenues		146,992			134,904			291,549			284,125			161,294			144,557
Gross profit		22,922			33,016			55,998			101,490			33,055			33,076
General and administrative expenses		14,224			14,804			30,546			30,375			14,604			16,322
Gain on sale of assets—net		(138	)		(39	)		(32	)		(184	)
(Gain) loss on sale of assets—net														(321	)		106
Operating income		8,836			18,251			25,484			71,299			18,772			16,648
Interest expense—net		(6,657	)		(6,725	)		(13,243	)		(13,355	)		(4,025	)		(6,586	)
Other income (expense)		755			565			896			(556	)		(405	)		141
Income before income taxes		2,934			12,091			13,137			57,388			14,342			10,203
Income tax provision		(829	)		(3,131	)		(2,218	)		(14,441	)		(3,285	)		(1,389	)
Net income	$	2,105		$	8,960		$	10,919		$	42,947		$	11,057		$	8,814

Basic earnings per share	$	0.03		$	0.14		$	0.17		$	0.66		$	0.17		$	0.14
Basic weighted average shares		65,646			64,864			65,458			64,659			65,847			65,269

Diluted earnings per share	$	0.03		$	0.14		$	0.16		$	0.65		$	0.17		$	0.13
Diluted weighted average shares		66,137			65,758			66,187			65,802			66,436			66,159

	Three Months Ended				Six Months Ended					Three Months Ended
	June 30,				June 30,					March 31,
	2021		2020		2021		2020			2022		2021

Net income	$	2,105	$	8,960	$	10,919	$	42,947		$	11,057	$	8,814
Net change in cash flow derivative hedges—net of tax (1)		404		3,440		2,290		(3,686	)		6,235		1,886
Comprehensive income	$	2,509	$	12,400	$	13,209	$	39,261		$	17,292	$	10,700

																										Accumulated
																	Shares of				Additional					Other
																	Common		Common		Paid-In			Retained		Comprehensive
																	Stock		Stock		Capital			Earnings		Income		Total
BALANCE—January 1, 2022																		65,746	$	6	$	308,482		$	90,369	$	140	$	398,997
Share-based compensation																		9	—			552		—		—			552
Vesting of restricted stock units and impact of shares withheld for taxes																		212	—			(1,827	)	—		—			(1,827	)
Exercise of options and purchases from employee stock plans																		79	—			390		—		—			390
Net income																	—		—		—				11,057	—			11,057
Other comprehensive loss—net of tax																	—		—		—			—			6,235		6,235
BALANCE—March 31, 2022																		66,046	$	6	$	307,597		$	101,426	$	6,375	$	415,404
								Retained			Accumulated															Accumulated
	Shares of				Additional			Earnings			Other						Shares of				Additional					Other
	Common		Common		Paid-In			(Accumulated			Comprehensive						Common		Common		Paid-In			Retained		Comprehensive
	Stock		Stock		Capital			Deficit)			Income (Loss)			Total			Stock		Stock		Capital			Earnings		Income		Total
BALANCE—January 1, 2021		65,023	$	6	$	304,757		$	40,937		$	968		$	346,668			65,023	$	6	$	304,757		$	40,937	$	968	$	346,668

Share-based compensation		73		-		2,564			-			-			2,564			63	—			1,766		—		—			1,766
Vesting of restricted stock units and impact of shares withheld for taxes		410		-		(3,784	)		-			-			(3,784	)		410	—			(3,784	)	—		—			(3,784	)
Exercise of options and purchases from employee stock plans		148		-		1,440			-			-			1,440			124	—			1,260		—		—			1,260
Net income		-		-		-			10,919			-			10,919		—		—		—				8,814	—			8,814
Other comprehensive income—net of tax		-		-		-			-			2,290			2,290		—		—		—			—			1,886		1,886
BALANCE—June 30, 2021		65,654	$	6	$	304,977		$	51,856		$	3,258		$	360,097

BALANCE—January 1, 2020		64,283	$	6	$	302,189		$	(23,091	)	$	295		$	279,399

Share-based compensation		61		-		3,130			-			-			3,130
Vesting of restricted stock units and impact of shares withheld for taxes		412		-		(2,106	)		-			-			(2,106	)
Exercise of options and purchases from employee stock plans		191		-		1,318			-			-			1,318
Net income		-		-		-			42,947			-			42,947
Other comprehensive loss—net of tax		-		-		-			-			(3,686	)		(3,686	)
BALANCE—June 30, 2020		64,947	$	6	$	304,531		$	19,856		$	(3,391	)	$	321,002

											Accumulated
	Shares of				Additional						Other
	Common		Common		Paid-In			Retained			Comprehensive
	Stock		Stock		Capital			Earnings			Income (Loss)			Total

BALANCE—March 31, 2021		65,620	$	6	$	303,999		$	49,751		$	2,854		$	356,610			65,620	$	6	$	303,999		$	49,751	$	2,854	$	356,610

Share-based compensation		12		-		798			-			-			798
Vesting of restricted stock units and impact of shares withheld for taxes		-		-		-			-			-			-
Exercise of options and purchases from employee stock plans		22		-		180			-			-			180
Net income		-		-		-			2,105			-			2,105
Other comprehensive income—net of tax		-		-								404			404
BALANCE—June 30, 2021		65,654	$	6	$	304,977		$	51,856		$	3,258		$	360,097

BALANCE—March 31, 2020		64,795	$	6	$	302,558		$	10,896		$	(6,831	)	$	306,629

Share-based compensation		22		-		1,455			-			-			1,455
Vesting of restricted stock units and impact of shares withheld for taxes		24		-		(178	)		-			-			(178	)
Exercise of options and purchases from employee stock plans		106		-		696			-			-			696
Net income		-		-		-			8,960			-			8,960
Other comprehensive income—net of tax		-		-		-			-			3,440			3,440
BALANCE—June 30, 2020		64,947	$	6	$	304,531		$	19,856		$	(3,391	)	$	321,002

	Six Months Ended						Three Months Ended
	June 30,						March 31,
	2021			2020			2022			2021
OPERATING ACTIVITIES:
Net income	$	10,919		$	42,947		$	11,057		$	8,814
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization		20,681			18,707			11,316			10,053
Deferred income taxes		2,218			14,441			3,285			1,389
Gain on sale of assets		(32	)		(184	)
(Gain) loss on sale of assets								(321	)		106
Amortization of deferred financing fees		1,715			805			317			403
Share-based compensation expense		2,564			3,130			552			1,766
Changes in assets and liabilities:
Accounts receivable		3,249			(14,109	)		45,791			(26,742	)
Contract revenues in excess of billings		(2,450	)		2,123			(34,691	)		3,188
Inventories		(1,233	)		(4,733	)		(5,703	)		(3,379	)
Prepaid expenses and other current assets		4,131			10,733			(6,612	)		(832	)
Accounts payable and accrued expenses		(2,668	)		(8,229	)		12,247			(10,303	)
Billings in excess of contract revenues		(3,775	)		(179	)		(11,126	)		6,055
Other noncurrent assets and liabilities		282			2,008			205			242
Cash provided by operating activities		35,601			67,460

Cash (used in) provided by operating activities								26,317			(9,240	)
INVESTING ACTIVITIES:
Purchases of property and equipment		(64,828	)		(21,076	)		(28,866	)		(27,038	)
Proceeds from dispositions of property and equipment		223			936			1,110		—
Cash used in investing activities		(64,605	)		(20,140	)		(27,756	)		(27,038	)

FINANCING ACTIVITIES:
Deferred financing fees		(4,395	)		-
Taxes paid on settlement of vested share awards		(3,784	)		(2,106	)		(1,827	)		(3,784	)
Exercise of options and purchases from employee stock plans		1,440			1,318			390			1,260
Cash used in financing activities		(6,739	)		(788	)		(1,437	)		(2,524	)
Net (decrease) increase in cash, cash equivalents and restricted cash		(35,743	)		46,532			(2,876	)		(38,802	)
Cash, cash equivalents and restricted cash at beginning of period		216,510			186,995			147,459			216,510
Cash, cash equivalents and restricted cash at end of period							$	144,583		$	177,708

Cash and cash equivalents							$	142,583		$	177,708
Restricted cash included in other long-term assets								2,000			—
Cash, cash equivalents and restricted cash at end of period	$	180,767		$	233,527		$	144,583		$	177,708

Supplemental Cash Flow Information
Cash paid for interest	$	13,984		$	12,548		$	100		$	106
Cash paid for income taxes	$	332		$	175		$	58		$	58

Non-cash Investing and Financing Activities
Property and equipment purchased but not yet paid	$	11,139		$	4,608		$	10,319		$	5,855

The unaudited condensed consolidated financial statements and notes herein should be read in conjunction with the audited consolidated financial statements of Great Lakes Dredge & Dock Corporation and Subsidiaries (the “Company” or “Great Lakes”) and the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2020.~~2021. The condensed consolidated financial statements included herein have been prepared by the Company without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the SEC’s rules and regulations, although management believes that the disclosures are adequate and make the information presented not misleading. In the opinion of management, all adjustments, which are of a normal and recurring nature (except as otherwise noted), that are necessary to present fairly the Company’s financial position as of ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020,~~2021, and its results of operations for the three ~~and six~~ months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~ and cash flows for the ~~six~~three months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~ have been included.

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor is generally hired on a project-by-project basis. Costs of contract revenues vary significantly depending on the type and location of work performed and assets utilized.

The Company has 1 operating segment which is also the Company’s reportable segment and reporting unit of which the Company tests goodwill for impairment. The Company performed its most recent annual test of impairment as of July 1, ~~2020~~2021 with no indication of impairment as of the test date. The Company will perform its next scheduled annual test of goodwill in the third quarter of ~~2021.~~

On August 4, 2020, the Company announced that its board of directors approved a share repurchase program, authorizing, but not obligating, the repurchase of up to an aggregate amount of $75.0 million of its common stock from time to time through July 31, 2021.2022.

The condensed consolidated results of operations and comprehensive income for the interim periods presented herein are not necessarily indicative of the results to be expected for the full year.

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings per share is computed similar to basic earnings per share except that it reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock.

	Three Months Ended				Six Months Ended				Three Months Ended
(shares in thousands)	June 30,				June 30,
`									March 31,
	2021		2020		2021		2020		2022		2021

Net income	$	2,105	$	8,960	$	10,919	$	42,947	$	11,057	$	8,814

Weighted-average common shares outstanding — basic		65,646		64,864		65,458		64,659		65,847		65,269
Effect of stock options and restricted stock units		491		894		729		1,143		589		890

Weighted-average common shares outstanding — diluted		66,137		65,758		66,187		65,802		66,436		66,159

Earnings per share — basic	$	0.03	$	0.14	$	0.17	$	0.66	$	0.17	$	0.14
Earnings per share — diluted	$	0.03	$	0.14	$	0.16	$	0.65	$	0.17	$	0.13

Accrued expenses at ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020~~2021 were as follows:

	June 30,		December 31,		March 31,		December 31,
	2021		2020		2022		2021

Insurance	$	17,365	$	14,754	$	13,355	$	12,821
Payroll and employee benefits		7,744		21,675		6,525		13,533
Interest						5,726		1,460
Other						5,220		6,427
Income and other taxes		1,995		2,164		2,903		2,941
Interest		1,728		3,285
Contract reserves		750		2,491		220		444
Other		7,648		8,530
Total accrued expenses	$	37,230	$	52,899	$	33,949	$	37,626

As of ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020,~~2021, the Company had 0 borrowings outstanding under our $200,000 amended and restated revolving credit and security agreement (as amended, the “Amended Credit Agreement”). There were ~~$35,909~~$21,527 and ~~$36,407~~$25,127 of letters of credit outstanding and ~~$163,764~~$178,146 and ~~$163,231~~$174,546 of availability under the Amended Credit Agreement as of ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020,~~2021, respectively. The availability under the Amended Credit Agreement is suppressed by $327 as of ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020,~~2021, as a result of certain limitations set forth in the Amended Credit Agreement.

In May 2021, the Company sold ~~$325 million~~$325,000 of unsecured 5.25% Senior Notes (the “2029 Notes”) pursuant to a private offering. The 2029 Notes were priced to investors at par and will mature on June 1, 2029. The Company used the net proceeds from the offering, together with cash on hand, to redeem all ~~$325 million~~$325,000 aggregate principal amount of its outstanding 8.000% Senior Notes due 2022 (the “8% Notes”). ~~Approximately $1.0 million of deferred financing fees related to the 8% Notes were extinguished and are presented within net interest expense in the Statement of Operations.~~

The Company’s obligations under these 2029 Notes are guaranteed by each of the Company’s existing and future 100% owned domestic subsidiaries that are co-borrowers or guarantors under ~~its~~the Amended Credit Agreement. Such guarantees are full, unconditional and joint and several. The parent company issuer has no independent assets or operations and all non-guarantor subsidiaries have been determined to be minor.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value hierarchy has been established by GAAP that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance describes three levels of inputs that may be used to measure fair value:

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. At times, the Company holds certain derivative contracts that it uses to manage commodity price risk. The Company does not hold or issue derivatives for speculative or trading purposes. The fair values of these financial instruments are summarized as follows:

			Fair Value Measurements at Reporting Date Using								Fair Value Measurements at Reporting Date Using
Description	At June 30, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		At March 31, 2022		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Fuel hedge contracts	$	4,802	$	-	$	4,802	$	-	$	8,971	$	-	$	8,971	$	-

			Fair Value Measurements at Reporting Date Using								Fair Value Measurements at Reporting Date Using
Description	At December 31, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		At December 31, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Fuel hedge contracts	$	1,739	$	-	$	1,739	$	-	$	630	$	-	$	630	$	-

The Company is exposed to certain market risks, primarily commodity price risk as it relates to diesel fuel purchase requirements, which occur in the normal course of business. The Company enters into heating oil commodity swap contracts to hedge the risk that fluctuations in diesel fuel prices could have an adverse impact on cash flows associated with its domestic dredging contracts. The Company’s typical goal is to hedge approximately 80% of the eligible fuel requirements for work in domestic backlog.

As of ~~June 30, 2021,~~March 31, 2022, the Company was party to various swap arrangements to hedge a portion of the price of its diesel fuel purchase requirements for work in its backlog to be performed through ~~June 2022.~~March 2023. As of ~~June 30, 2021,~~March 31, 2022, there were ~~8.7~~7.1 million gallons remaining on these contracts ~~which represent approximately 80% of the Company’s~~representing forecasted domestic fuel purchases through ~~June 2022.~~March 2023. Under these swap agreements, the Company will pay fixed prices ranging from ~~$1.22~~$1.64 to ~~$1.90~~$3.50 per gallon.

At ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020~~2021, the fair value asset of the fuel hedge contracts were estimated to be ~~$4,802~~$8,971 and ~~$1,739,~~$630, respectively, and are recorded in prepaid expenses and other current assets. For fuel hedge contracts considered to be highly effective, the ~~losses~~gains reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the ~~six~~three months ended ~~June 30, 2021~~March 31, 2022 were ~~$3,404.~~$2,481. The remaining gains and losses included in accumulated other comprehensive loss at ~~June 30, 2021~~March 31, 2022 will be reclassified into earnings over the next twelve months, corresponding to the period during which the hedged fuel is expected to be utilized. Changes in the fair value of fuel hedge contracts not considered highly effective are recorded as cost of contract revenues in the Statement of Operations. The fair values of fuel hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines fair value of these fuel hedges using Level 2 inputs.

The Company is exposed to counterparty credit risk associated with non-performance of its various derivative instruments. The Company’s risk would be limited to any unrealized gains on current positions. To help mitigate this risk, the Company transacts only with counterparties that are rated as investment grade or higher. In addition, all counterparties are monitored on a continuous basis.

The fair value of the fuel hedge contracts outstanding as of ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020~~2021 is as follows:

		Fair Value at					Fair Value at
		June 30,		December 31,			March 31,		December 31,
	Balance Sheet Location	2021		2020		Balance Sheet Location	2022		2021
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	4,802	$	1,739	Prepaid expenses and other current assets	$	8,971	$	630

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	Three Months Ended					Six Months Ended						Three Months Ended
	June 30,					June 30,						March 31,
	2021			2020		2021			2020			2022			2021
Derivatives:
Reclassification of derivative (gains) losses to earnings—net of tax		(1,878	)		2,490		(3,404	)		3,828
Reclassification of derivative gains to earnings—net of tax													(2,481	)		(1,526	)
Change in fair value of derivatives—net of tax		2,282			950		5,694			(7,514	)		8,716			3,412
Net change in cash flow derivative hedges—net of tax	$	404		$	3,440	$	2,290		$	(3,686	)	$	6,235		$	1,886

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

		Three Months Ended					Six Months Ended						Three Months Ended
		June 30,					June 30,						March 31,
	Statement of Operations Location	2021			2020		2021			2020		Statement of Operations Location	2022			2021
Derivatives:
Fuel hedge contracts	Costs of contract revenues	$	(2,513	)	$	3,340		(4,554	)		5,132	Costs of contract revenues	$	(3,319	)	$	(2,041	)
	Income tax (provision) benefit		(635	)		850		(1,150	)		1,304	Income tax provision		(838	)		(515	)
		$	(1,878	)	$	2,490	$	(3,404	)	$	3,828		$	(2,481	)	$	(1,526	)

The carrying value of financial instruments included in current assets and current liabilities approximates fair value due to the short-term maturities of these instruments. Based on timing of the cash flows and comparison to current market interest rates, the carrying value of our revolving credit agreement approximates fair value. In May 2021, the Company ~~issued~~sold $325,000 of ~~5.25% Senior~~the 2029 Notes, which were outstanding at ~~June 30, 2021~~March 31, 2022 (see Note 4, Long-term debt). The 2029 Notes are senior unsecured obligations of the Company and its subsidiaries that guarantee the 2029 Notes. The fair value of the ~~senior notes~~2029 Notes was ~~$334,783~~$310,375 at ~~June 30, 2021,~~March 31, 2022, which is a Level 1 fair value measurement as the senior notes’ value was obtained using quoted prices in active markets. It is impracticable to determine the fair value of outstanding letters of credit or performance, bid and payment bonds due to uncertainties as to the amount and timing of future obligations, if any.

On May 5, 2021, the Company’s stockholders approved the Great Lakes Dredge & Dock Corporation 2021 Long-Term Incentive Plan (the “Incentive Plan”), which previously had been approved by the Company’s board of directors subject to stockholder approval. The Incentive Plan replaces the 2017 Long-Term Incentive Plan (the “Prior Plan”) and is largely based on the Prior Plan, but with updates to the available shares and other administrative changes. The Incentive Plan permits the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to the Company’s employees and directors for up to 1.5 million shares of common stock, plus the number of shares that remained available for future grant under the Prior Plan as of the effectiveness of the Incentive Plan.

The Prior Plan permitted the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to the Company’s employees and directors for up to 3.3 million shares of common stock, plus an additional 1.7 million shares underlying equity awards issued under the 2007 Long-Term Incentive Plan.

During the ~~six~~three months ended ~~June 30, 2021,~~March 31, 2022, the Company granted ~~307 thousand~~8,000 restricted stock units to certain employees. In addition, all non-employee directors on the Company’s board of directors are paid a portion of their board-related compensation in stock grants or restricted stock units. Compensation cost charged to expense related to share-based compensation arrangements was ~~$798~~$552 and ~~$1,455~~$1,766 for the three months ended ~~June 30,~~March 31, 2022 and 2021, ~~and 2020,~~ respectively. ~~Compensation cost charged to expense related to share-based compensation arrangements was $2,564 and $3,130 for the six months ended June 30, 2021 and 2020, respectively.~~

At ~~June 30, 2021,~~March 31, 2022, the Company had ~~$454,402~~$473,471 of remaining performance obligations, which the Company refers to as total backlog. Approximately ~~93%~~79% of the Company’s backlog ~~will~~is expected to be completed in ~~2021~~2022 with the remaining balance expected to be completed in ~~2022.~~2023.

The following series of tables presents our revenue disaggregated by several categories.

Domestically, ~~our~~the Company’s work generally is performed in coastal waterways and deep-water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. Foreign projects typically involve capital work.

The Company’s contract revenues by type of work, for the periods indicated, were as follows:

	Three Months Ended				Six Months Ended				Three Months Ended
	June 30,				June 30,				March 31,
Revenues	2021		2020		2021		2020		2022		2021
Dredging:
Capital—U.S.	$	79,399	$	63,440	$	157,005	$	146,989	$	101,010	$	77,606
Capital—foreign		1,613		3,981		6,322		10,843		-		4,709
Coastal protection		46,631		56,038		93,262		135,888		71,917		46,631
Maintenance		37,278		41,968		82,579		84,353		19,812		45,301
Rivers & lakes		4,993		2,493		8,379		7,542		1,610		3,386
Total revenues	$	169,914	$	167,920	$	347,547	$	385,615	$	194,349	$	177,633

The Company’s contract revenues by type of customer, for the periods indicated, were as follows:

	Three Months Ended				Six Months Ended				Three Months Ended
	June 30,				June 30,				March 31,
Revenues	2021		2020		2021		2020		2022		2021
Dredging:
Federal government	$	127,331	$	133,496	$	258,063	$	299,263	$	167,574	$	130,732
State and local government		37,069		29,693		71,844		72,025		24,601		34,775
Private		3,901		750		11,318		3,484		2,174		7,417
Foreign		1,613		3,981		6,322		10,843		-		4,709
Total revenues	$	169,914	$	167,920	$	347,547	$	385,615	$	194,349	$	177,633

Accounts receivable at ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020~~2021 are as follows:

	June 30,			December 31,			March 31,			December 31,
	2021			2020			2022			2021
Completed contracts	$	12,526		$	12,347		$	6,348		$	10,612
Contracts in progress		15,393			21,239			23,639			65,415
Retainage		8,386			5,968			7,739			7,490
		36,305			39,554			37,726			83,517
Allowance for doubtful accounts		(564	)		(564	)		(564	)		(564	)

Total accounts receivable—net	$	35,741		$	38,990		$	37,162		$	82,953

The components of contracts in progress at ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020~~2021 are as follows:

	June 30,			December 31,			March 31,			December 31,
	2021			2020			2022			2021
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	317,984		$	199,964		$	369,584		$	270,998
Amounts billed		(291,493	)		(168,569	)		(323,841	)		(240,941	)
Costs and earnings in excess of billings for contracts in progress		26,491			31,395			45,743			30,057
Costs and earnings in excess of billings for completed contracts		10,177			2,823			29,898			10,894
Total contract revenues in excess of billings	$	36,668		$	34,218		$	75,641		$	40,951

Current portion of contract revenues in excess of billings	$	34,556		$	32,106		$	74,535		$	39,844
Long-term contract revenues in excess of billings		2,112			2,112			1,106			1,107
Total contract revenues in excess of billings	$	36,668		$	34,218		$	75,641		$	40,951

Billings in excess of costs and earnings:
Amounts billed	$	(382,785	)	$	(550,468	)	$	(141,076	)	$	(224,381	)
Costs and earnings for contracts in progress		353,952			517,860			137,389			209,567
Total billings in excess of contract revenues	$	(28,833	)	$	(32,608	)	$	(3,687	)	$	(14,814	)

In the first quarter of 2022, a revision to the estimated gross profit percentage of a project was recognized due to a positive settlement of a claim from the recently completed project resulting in a cumulative net impact on the project margin, which increased gross profit by $11,724.

At ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020,~~2021, costs to fulfill a contract with a customer recognized as an asset were ~~$6,887~~$5,656 and ~~$10,501,~~$5,652, respectively, and are recorded in other current assets and other noncurrent assets. These costs relate to pre-contract and pre-construction activities. During the three ~~and six~~ months ended ~~June 30,~~March 31, 2022 and 2021, ~~and 2020,~~ the Company amortized ~~$5,909~~$2,402 and ~~$3,612, and 11,756 and 8,804~~$5,847, respectively, of pre-construction costs.

Performance and bid bonds are customarily required for dredging and marine construction projects. The Company has bonding agreements with Argonaut Insurance Company, Berkley Insurance Company, Chubb Surety and Liberty Mutual Insurance Company, under which the Company can obtain performance, bid and payment bonds. The Company also has outstanding bonds with Travelers Casualty, Surety Company of America and Zurich American Insurance Company. Bid bonds are generally obtained for a percentage of bid value and amounts outstanding typically range from $1,000 to $10,000. At ~~June 30, 2021,~~March 31, 2022, the Company had outstanding performance bonds with a notional amount of approximately ~~$1,143,833.~~$1,178,796. The revenue value remaining in backlog totaled approximately ~~$454,402.~~$473,471.

Certain foreign projects performed by the Company have warranty periods, typically spanning no more than one to three years beyond project completion, whereby the Company retains responsibility to maintain the project site to certain specifications during the warranty period. Generally, any potential liability of the Company is mitigated by insurance, shared responsibilities with consortium partners, and/or recourse to owner-provided specifications.

As is customary with negotiated contracts and modifications or claims to competitively bid contracts with the federal government, the government has the right to audit the books and records of the Company to ensure compliance with such contracts, modifications, or claims, and the applicable federal laws. The government has the ability to seek a price adjustment based on the results of such audit. Any such audits have not had, and are not expected to have, a material impact on the financial position, operations, or cash flows of the Company.

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against the Company and certain of its subsidiaries. The Company will defend itself vigorously on all matters. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved, or settled adversely to the Company. Although the Company is subject to various claims and legal actions that arise in the ordinary course of business, except as described below, the Company is not currently a party to any material legal proceedings or environmental claims. The Company records an

accrual when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any of these proceedings, individually or in the aggregate, would be expected to have a material effect on results of operations, cash flows or financial condition.

On April 23, 2014, the Company completed the sale of NASDI, LLC (“NASDI”) and Yankee Environmental Services, LLC (“Yankee”), which together comprised the Company’s historical demolition business, to a ~~privately owned~~privately-owned demolition company. On January 14, 2015, the Company and its subsidiary, NASDI Holdings, LLC, brought an action in the Delaware Court of Chancery to enforce the terms of the Company's agreement to sell NASDI and Yankee. Under the terms of the agreement, the Company received cash of $5,309 and retained the right to receive additional proceeds based upon future collections of outstanding accounts receivable and work in process existing at the date of close. The Company seeks specific performance of the buyer’s obligation to collect and to remit the additional proceeds, and other related relief. Defendants have filed counterclaims alleging that the Company misrepresented the quality of its contracts and receivables prior to the sale. The Company denies defendants’ allegations. In addition, the Company has been granted a judgment in the amount of $21,934 based upon the buyer’s default of its obligations to indemnify the Company for losses resulting from failure to perform in accordance with terms of surety performance bond. The defendants filed a notice of appeal from that judgement. The Company continues to aggressively pursue collection from the buyer on outstanding amounts owed under the sale and the indemnification. An estimate of a range of potential gains or losses relating to these matters cannot reasonably be made.

On April 22, 2021, the U.S. Attorney’s Office for the Eastern District of Louisiana filed a bill of information against the Company charging the Company with a negligent discharge violation of the Clean Water Act arising from a September 2016 oil spill. The spill occurred during the Company’s Cheniere Ronquille project and resulted in the discharge of around one hundred sixty barrels of crude oil in Bay Long, Louisiana. The Company has cooperated with the U.S. Attorney’s Office and other relevant agencies in their investigation of the oil spill and on June 15, 2021, the Company pleaded guilty to the misdemeanor violation alleged in the bill of information and agreed to pay a fine of $1,000. AsIn the first quarter of 2022, the Company entered into a ~~result,~~settlement of a civil suit arising from the ~~government may initiate suspension or debarment proceedings against us,~~same matter which ~~might prohibit us from bidding for, entering into or completing certain government projects.~~was primarily covered by its insurance policies. The Company ~~also~~ remains subject to potential liability for restitution in connection with this criminal matter, and has deposited the potential liability for the criminal matter of $2,000 into the registry of the court. That amount is presented as restricted cash in other noncurrent assets. On April 18, 2022, the government filed a motion seeking restitution for an amount less than what was deposited into the registry of the court. The related hearing was held in federal court on April 26, 2022, and the sentencing hearing is scheduled for June 14, 2022. If it is determined that the Company owes additional restitution, the Company believes that the amount could range between $0 and the $2,000 previously deposited. As a result of the pending ~~civil suit arising~~conviction, the government will initiate statutory debarment proceedings against the Company, which might prohibit the Company from ~~the same matter.~~bidding for, entering into or completing certain government projects. Although the Company does not know whether debarment proceedings will ~~be initiated or~~ result in prohibitions, or the impact of any such resulting prohibitions, the Company does not expect any such proceedings or prohibitions to cause a material disruption to its business, financial condition or results of operations.

On September 27, 2019, the EPA Region 4 filed an administrative complaint against the Company relating to a project the Company performed at PortMiami from 2013-2015 alleging violations of Section 103 of the Marine Protection, Research, and Sanctuaries Act (“MPRSA”) and failure to report violations of the MPRSA. In July 2021, the parties executed a consent agreement wherein the Company agreed to pay $500 as a civil penalty.

The Company leases certain operating equipment and office facilities under long-term operating leases expiring at various dates through 2030. The equipment leases contain renewal or purchase options that specify prices at the then fair value upon the expiration of the lease terms. The leases also contain default provisions that are triggered by an acceleration of debt maturity under the terms of the Company’s Amended Credit Agreement, or, in certain instances, cross default to other equipment leases and certain lease arrangements require that the Company maintain certain financial ratios comparable to those required by its Amended Credit Agreement. Additionally, the leases typically contain provisions whereby the Company indemnifies the lessors for the tax treatment attributable to such leases based on the tax rules in place at lease inception. The tax indemnifications do not have a contractual dollar limit. To date, no lessors have asserted any claims against the Company under these tax indemnification provisions.

Certain statements in this Quarterly Report on Form 10-Q may constitute “forward-looking” statements as defined in Section 27A of the Securities Act of 1933 (the “Securities Act”), Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”), the Private Securities Litigation Reform Act of 1995 (the “PSLRA”) or in releases made by the Securities and Exchange Commission (“SEC”), all as may be amended from time to time. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause the actual results, performance or achievements of Great Lakes Dredge & Dock Corporation and its subsidiaries (“Great Lakes” or the “Company”), or industry results, to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. Statements that are not historical fact are forward-looking statements. Forward-looking statements can be identified by, among other things, the use of forward-looking language, such as the words “plan,” “believe,” “expect,” “anticipate,” “intend,” “estimate,” “project,” “may,” “would,” “could,” “should,” “seeks,” or “scheduled to,” or other similar words, or the negative of these terms or other variations of these terms or comparable language, or by discussion of strategy or intentions.

These cautionary statements are being made pursuant to the Securities Act, the Exchange Act and the PSLRA with the intention of obtaining the benefits of the “safe harbor” provisions of such laws. Great Lakes cautions investors that any forward-looking statements made by Great Lakes are not guarantees or indicative of future performance. Important assumptions and other important factors that could cause actual results to differ materially from those forward-looking statements with respect to Great Lakes, include, but are not limited to, risks and uncertainties that are described in Item 1A. “Risk Factors” of Great Lakes’ Annual Report on Form 10-K for the year ended December 31, ~~2020, in Item 1A. “Risk Factors” of Great Lakes’ Quarterly Report on Form 10-Q for the quarter ended March 31,~~ 2021 ~~in Item 1A. “Risk Factors” of this Quarterly Report on Form 10-Q~~ and in other securities filings by Great Lakes with the SEC.

Although Great Lakes believes that its plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, actual results could differ materially from a projection or assumption in any forward-looking statements. Great Lakes’ future financial condition and results of operations, as well as any forward-looking statements, are subject to change and inherent risks and uncertainties. The forward-looking statements contained in this Quarterly Report on Form 10-Q are made only as of the date hereof and Great Lakes does not have or undertake any obligation to update or revise any forward-looking statements whether as a result of new information, subsequent events or otherwise, unless otherwise required by law.

The Company is the largest provider of dredging services in the United States. In addition, the Company is fully engaged in expanding its core business into the rapidly developing offshore wind energy industry. The Company has a long history of performing significant international projects. The mobility of the Company’s fleet enables the Company to move equipment in response to changes in demand for dredging services.

In the fourth quarter of 2020, the Company announced the relocation of its headquarters from Oak Brook, Illinois to Houston, Texas. The Company’s new corporate office in Houston opened in the first quarter of 2021. This relocation places the Company closer to key regional customers and new markets, especially along the Gulf Coast and the Mississippi River.

Dredging generally involves the enhancement or preservation of the navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Domestically, our work generally is performed in coastal waterways and ~~deep water~~deep-water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. The Company’s bid market is defined as the aggregate dollar value of domestic dredging projects on which the Company bid or could have bid if not for capacity constraints or other considerations (“bid market”). The Company experienced an average combined bid market share in the U.S. of ~~37%~~35% over the prior three years, including 49%, ~~55%~~54%, ~~19%~~17% and ~~34%~~23% of the domestic capital, coastal protection, maintenance and rivers & lakes sectors, respectively.

The Company’s largest domestic ~~dredging~~ customer is the U.S. Army Corps of Engineers (the “Corps”), which has responsibility for federally funded projects related to navigation and flood control of U.S. waterways. In the first ~~six~~three months of ~~2021,~~2022, the Company’s dredging revenues earned from contracts with federal government agencies, including the Corps as well as other federal entities such as the U.S. Coast Guard and the U.S. Navy were approximately ~~74%~~86% of dredging revenues, ~~slightly below~~above the Company’s prior ~~three year~~three-year average of ~~79%~~80%.

~~In December 2019, a novel strain of~~The coronavirus ~~(COVID-19) was reported to have surfaced in Wuhan, China. COVID-19~~(“COVID-19”) pandemic has since spread worldwide and to every state in the United States. On March 11, 2020, the World Health Organization declared COVID-19 a pandemic and on March 13, 2020 the United States declared a national emergency in response to the coronavirus outbreak. This outbreak has severely impacted global economic activity and many countries, ~~and states in~~including the United States and its governmental entities and private businesses, have reacted by instituting quarantines, mandating school and business closures and limiting travel at various times throughout the pandemic.

On March 28, 2020, dredging was specifically listed in the U.S. Department of Homeland Security’s “Advisory Memorandum on Identification of Essential Critical Infrastructure Workers During COVID-19 Response” which federally designates the Company as an essential business or “critical infrastructure” company that can maintain operations during the ongoing pandemic. As mentioned above, the Company’s largest domestic dredging customer is the Corps; the Corps oversees the majority of these critical infrastructure projects and, in this capacity, has continued to follow their bid schedule and prioritize all types of dredging including port maintenance

and expansion and coastal protection projects that are necessary to avoid potential storm damage during hurricane season. Despite the uncertainty surrounding COVID-19, to date, the Corps is continuing to advertise new projects. ~~During the first half of 2021 the Company began to experience increased project costs and delays related to COVID-19; currently, all affected projects are back in operation.~~

Our Executive Leadership team has established a COVID-19 Command Team that meets ~~twice~~once each week to update contingency plans, as necessary, and address the challenges related to maintaining operations in this evolving economic environment. The Company’s primary focus has been the health and safety of its employees. The Company has implemented new paid leave policies and additional sanitary and safety measures to mitigate the risk of infection to employees.

On vessels and job sites, the Company has instituted fewer employee shift changes and increased sanitary ~~and social distancing~~ measures. InThe Company is now 100% fully vaccinated against COVID-19, with few accommodations. Direct COVID-19 related costs were approximately $1,000 for the first ~~half~~quarter of ~~2021,~~2022 compared to approximately $4,300 in the ~~Company began to experience more significant operational interruptions and direct costs related to the third wave~~first quarter of the COVID-19 pandemic. Several vessel crews were infected despite extensive testing and isolation protocols. Vessels were required to go to shore for crew changes and the vessels had to be disinfected before returning to work. This impacted the vessels’ scheduling and availability which led to project delays. Currently, those projects and vessels that were impacted are completed and back in operation, respectively. The Company has initiated an extensive vaccination effort of our crews and staff and the Company currently has 71% of its staff either fully vaccinated or partially vaccinated.2021.

~~Since March 2020,~~In mid-2021, the Company’s corporate employees ~~have effectively transitioned to~~began transitioning from a remote working environment and have discontinued non-essential travel to follow recommended physical and social distancing guidelines in order to reduce the risk of infection. Beginning in the current quarter, the Company’s Houston employees began transitioning back to working in person ~~at the Houston corporate headquarters.~~with a hybrid working environment. The Company is following the protocols published by the U.S. Centers for Disease Control and Prevention, the World Health Organization and state and local governments. As the Company’s employees, customers and communities are facing significant challenges, the Company cannot predict how COVID-19 will evolve or the impact it, or actions taken to contain it, will have on future results. Due to the uncertainty that surrounds this virus, the Company will be continually evaluating safety and operational contingency plans and the potential future impact that this evolving environment has on the Company’s business, financial condition and results of operations.

The Company plans to participate in the offshore wind market and in ~~March~~November 2021, the Company ~~awarded~~entered into a $197 million contract ~~for the design and development of~~with Philly Shipyard Inc. to build the first U.S. flagged Jones Act compliant, inclined fall-pipe vessel for subsea rock installation for wind turbine ~~foundations.~~foundations with expected delivery of the vessel in the second half of 2024. This vessel ~~would represent~~represents a significant and critical advancement in building the U.S. logistics infrastructure to support the future of the new U.S. offshore wind industry. ~~Once the contract is fully executed, the Company expects delivery of the vessel in early 2024. As of the current quarter, the~~The Company has begun ~~soliciting bids~~bidding on select projects in the offshore wind ~~market.~~market and was recently awarded its first contract.

The current ~~administration~~Presidential Administration has pushed to accelerate renewable energy developments and has set a target to install 30GW of offshore wind energy generation capacity by 2030 on the U.S. ~~east coast. Additionally, in~~East Coast. In March 2021, the White House announced new initiatives that will advance the administration’s goals to expand the nation’s offshore wind energy capacity in the coming decade by opening new areas of development, improving environmental permitting and increasing public financing for ~~projects.~~

projects In ~~July~~addition, in January 2022, the administration announced plans to auction more than 480,000 acres in the New York Bight for six new offshore wind energy leases, the administration’s first wind sale and the largest lease area ever offered, with potential build-out capacity of up to 7GW. Additionally, in 2021, the ~~Corps’~~U.S. Senate passed the $1.2 trillion infrastructure bill where the Corps will be granted $11.6 billion in funding to improve the nation’s resilience to the effects of climate change.

On March 15, 2022 the Omnibus Appropriations Bill was signed into law, which included funding for the Corps totaling $8.3 billion for fiscal year 2022. This is an increase of $548 million above the fiscal year 2021 amount and an increase of $1.6 billion above the President’s original budget ~~was approved by the House of Representatives at a record high proposed budget level of $8.66 billion. In this bill,~~request. Appropriations included $4.6 billion for operation and maintenance, including $2.5 billion from the Harbor Maintenance Trust Fund (“HMTF”) in accordance with the Coronavirus Aid, Relief and Economic Security Act (the ~~“HMTF”~~“CARES Act”) ~~would receive $2.05 billion. This record funding is in addition to~~and $35.0 million for flood control and coastal emergencies which includes $19.8 million for the ~~annual cap being lifted from the HMTF in 2020 and the 2020~~construction of shore protection projects.

The Water Resource Development Act bill (the “WRDA”)~~. WRDA~~, which authorizes new projects and makes policy changes that will make natural infrastructure and beneficial use of dredged material more common, ~~and~~ was included in the Consolidated Appropriations Act 2021 signed into law on December 27, 2020. This continues the trend of WRDA legislation in each session of Congress since 2014. The legislation provides access to the $9.3 billion in unspent HMTF tax collections, establishes a funds distribution process for HMTF funding and approves projects to proceed to construction.

The Company has one operating segment which is also the Company’s one reportable segment and reporting unit.

The Company’s vessels are subject to periodic dry dock inspections to verify that the vessels have been maintained in accordance with the rules of the U.S. Coast Guard and the American Bureau of Shipping (“~~ABS”~~ABS��) and that recommended repairs have been satisfactorily completed. Dry dock frequency is a statutory requirement mandated by the U.S. Coast Guard and the ABS. The Company’s vessels dry-dock every two to three years or every five years, depending on the vessel type and also on an as-needed basis for occasional unscheduled repairs. The Company experienced two dry dock inspections in the first quarter of 2022. One vessel remained in dry dock at quarter end with the expectation of returning to work in the second quarter.

The following tables set forth the components of net income and Adjusted EBITDA, as defined below, as a percentage of contract revenues for the three ~~and six~~ months ended ~~June 30, 2021~~March 31, 2022 and ~~2020:~~2021:

	Three Months Ended						Six Months Ended
	June 30,						June 30,								Three Months Ended
	2021			2020			2021				2020				March 31,
															2022				2021
Contract revenues		100.0	%		100.0	%		100.0		%		100.0		%		100.0		%		100.0		%
Costs of contract revenues		(86.5	)		(80.3	)		(83.9	)			(73.7	)			(83.0	)			(81.4	)
Gross profit		13.5			19.7			16.1				26.3				17.0				18.6
General and administrative expenses		8.4			8.8			8.8				7.9				7.5				9.2
Gain on sale of assets—net		(0.1	)		-			-				-
(Gain) loss on sale of assets—net																(0.2	)			0.1
Operating income		5.2			10.9			7.3				18.4				9.7				9.3
Interest expense—net		(3.9	)		(4.0	)		(3.8	)			(3.5	)			(2.1	)			(3.7	)
Other income (expense)		0.4			0.3			0.3				(0.1	)			(0.2	)			0.1
Income before income taxes		1.7			7.2			3.8				14.8				7.4				5.7
Income tax provision		(0.5	)		(1.9	)		(0.6	)			(3.7	)			(1.7	)			(0.8	)
Net income		1.2			5.3			3.2		%		11.1		%		5.7		%		4.9		%

Adjusted EBITDA		11.9	%		16.7	%		13.5		%		23.2		%		15.3		%		15.1		%

Adjusted EBITDA, as provided herein, represents net income (loss) from continuing operations, adjusted for net interest expense, income taxes, depreciation and amortization expense, debt extinguishment, accelerated maintenance expense for new international deployments, goodwill or asset impairments and gains on bargain purchase acquisitions. Adjusted EBITDA is not a measure derived in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Company presents Adjusted EBITDA as an additional measure by which to evaluate the Company’s operating trends. The Company believes that Adjusted EBITDA is a measure frequently used to evaluate performance of companies with substantial leverage and that the Company’s primary stakeholders (i.e., its stockholders, bondholders and banks) use Adjusted EBITDA to evaluate the Company’s period to period performance. Additionally, management believes that Adjusted EBITDA provides a transparent measure of the Company’s recurring operating performance and allows management and investors to readily view operating trends, perform analytical comparisons and identify strategies to improve operating performance. For this reason, the Company uses a measure based upon Adjusted EBITDA to assess performance for purposes of determining compensation under the Company’s incentive plan. Adjusted EBITDA should not be considered an alternative to, or more meaningful than, amounts determined in accordance with GAAP including: (a) operating income as an indicator of operating performance; or (b) cash flows from operations as a measure of liquidity. As such, the Company’s use of Adjusted EBITDA, instead of a GAAP measure, has limitations as an analytical tool, including the inability to determine profitability or liquidity due to the exclusion of accelerated maintenance expense for new international deployments, goodwill or asset impairments, gains on bargain purchase acquisitions, interest and income tax expense and the associated significant cash requirements and the exclusion of depreciation and amortization, which represent significant and unavoidable operating costs given the level of indebtedness and capital expenditures needed to maintain the Company’s business. For these reasons, the Company uses operating income to measure the Company’s operating performance and uses Adjusted EBITDA only as a supplement. The following is a reconciliation of Adjusted EBITDA to net income:

	Three Months Ended				Six Months Ended				Three Months Ended
	June 30,				June 30,				March 31,
	2021		2020		2021		2020		2022		2021
(in thousands)
Net income	$	2,105	$	8,960	$	10,919	$	42,947	$	11,057	$	8,814
Adjusted for:
Interest expense—net		6,657		6,725		13,243		13,355		4,025		6,586
Income tax provision		829		3,131		2,218		14,441		3,285		1,389
Depreciation and amortization		10,628		9,256		20,681		18,707		11,316		10,053
Adjusted EBITDA	$	20,219	$	28,072	$	47,061	$	89,450	$	29,683	$	26,842

The Company’s contract revenues by type of work, for the periods indicated, were as follows:

	Three Months Ended							Six Months Ended							Three Months Ended
	June 30,							June 30,							March 31,
Revenues (in thousands)	2021		2020		Change			2021		2020		Change			2022		2021		Change
Dredging:
Capital—U.S.	$	79,399	$	63,440		25.2	%	$	157,005	$	146,989		6.8	%	$	101,010	$	77,606		30.2	%
Capital—foreign		1,613		3,981		(59.5	)%		6,322		10,843		(41.7	)%		-		4,709		(100.0	)%
Coastal protection		46,631		56,038		(16.8	)%		93,262		135,888		(31.4	)%		71,917		46,631		54.2	%
Maintenance		37,278		41,968		(11.2	)%		82,579		84,353		(2.1	)%		19,812		45,301		(56.3	)%
Rivers & lakes		4,993		2,493		100.3	%		8,379		7,542		11.1	%		1,610		3,386		(52.5	)%
Total revenues	$	169,914	$	167,920		1.2	%	$	347,547	$	385,615		(9.9	)%	$	194,349	$	177,633		9.4	%

Total revenue was ~~$169.9~~$194.3 million for the three months ended ~~June 30, 2021,~~March 31, 2022, up ~~$2.0~~$16.7 million, or ~~1.2%~~9.4%, from ~~$167.9~~$177.6 million for the same period in the prior year. For the three months ended ~~June 30, 2021,~~March 31, 2022, the Company experienced an increase in domestic capital and ~~rivers & lakes~~ ~~revenues~~coastal protection revenue as compared to the same period in the prior year. This increase was partially offset by a decrease in~~coastal protection,~~ maintenance, rivers & lakes and foreign capital revenue during the ~~current period~~first quarter of 2022 as compared to the same period in the prior year. For the six months ended June 30, 2021, total revenue was $347.5 million, down from revenue of $385.6 million for the same period in the prior year, representing a decrease of $38.1 million or 9.9%. For the six months ended June 30, 2021, the Company experienced a ~~decrease in coastal protection, maintenance and foreign capital revenue as compared to the same period in the prior year. This decrease was slightly offset by an increase~~ in ~~domestic capital and rivers & lakes~~ ~~revenues during the current period as compared to the same period in the prior year.~~

Capital dredging consists primarily of port expansion projects, which involve the deepening of channels and berthing basins to allow access by larger, deeper draft ships and the provision of land fill used to expand port facilities. In addition to port work, capital projects also include coastal restoration and land reclamations, trench digging for pipelines, tunnels and cables, and other dredging related to the construction of breakwaters, jetties, canals and other marine structures. For the three months ended ~~June 30, 2021,~~March 31, 2022, domestic capital dredging revenue was ~~$79.4~~$101.0 million, up ~~$16.0~~$23.4 million, or ~~25.2%~~30.2%, compared to ~~$63.4~~$77.6 million for the same period in ~~2020.~~2021. The increase in capital dredging revenues for the three months ended ~~June 30, 2021~~March 31, 2022 was mostly due to a greater amount of revenue earned on projects in Texas, Massachusetts, Florida, Louisiana, Alabama, New Hampshire and ~~Alabama,~~Maine in the ~~current year~~first quarter of 2022 when compared to the prior year quarter. This increase was partially offset by less revenue earned on projects in Florida and Louisiana in the current quarter. For the six months ended June 30, 2021, domestic capital revenue was $157.0 million compared to $147.0 million for the same period in 2020, representing an increase of $10.0 million, or 6.8%. The increase in capital dredging revenues for the six months ended June 30, 2021 was mostly due to a greater amount of revenue earned on projects in Massachusetts, and South Carolina, in the prior ~~year period when compared to the current~~ year. This increase was partially offset by ~~less~~ revenue earned on projects in ~~Texas, Delaware,~~South Carolina and ~~Florida~~Mississippi in the ~~current~~prior year.

Foreign capital projects typically involve land reclamations, channel deepening and port infrastructure development. In the ~~second~~first quarter of ~~2021,~~2022, there was no foreign capital revenue ~~was $1.6 million, down $2.4 million, or 59.5%, as~~ compared to ~~$4.0~~$4.7 million in the same quarter in the prior year. Foreign capital revenue for the first half of 2021 was $6.3 million which is $4.5 million, or 41.7%, lower than revenue of $10.8 million for the same period of the prior year. The Company continued to earn revenue in 2021 from a project in Bahrain that is essentially completed as of the current quarter.

Coastal protection projects involve moving sand from the ocean floor to shoreline locations where erosion threatens shoreline assets. Coastal protection revenue for the quarter ended ~~June 30, 2021~~March 31, 2022 was ~~$46.6~~$71.9 million, ~~a decrease~~an increase of ~~$9.4~~$25.3 million, or ~~16.8%~~54.3%, compared to ~~$56.0~~$46.6 million in the prior year period. The ~~decrease~~increase in coastal protection revenues for the three months ended ~~June 30, 2021~~March 31, 2022 was mostly attributable to a lower amount of revenue earned on projects in Virginia, New Jersey, Florida and South Carolina in the prior year period when compared to the current year. This decrease was slightly offset by revenue earned on two projects in North Carolina in the current year quarter. Coastal protection revenue for the six months ended June 30, 2021 was $93.3 million, ~~representing a decrease of $42.6 million or 31.4%, from $135.9 million for the same period in 2020.~~ ~~The decrease in coastal protection revenues for the six months ended June 30, 2021 was mostly due~~ to a greater amount of revenue earned on projects in ~~Virginia,~~North Carolina, New Jersey ~~Florida, South Carolina,~~ and ~~Georgia,~~New York in the ~~prior~~current year period when compared to the ~~current~~prior year. This ~~decrease~~increase was ~~partially~~slightly offset by ~~more~~ revenue earned on projects in ~~North Carolina~~Florida, Louisiana and ~~Louisiana~~Virginia in the ~~current~~prior year.

Maintenance dredging consists of the re-dredging of previously deepened waterways and harbors to remove silt, sand and other accumulated sediments. Due to natural sedimentation, most channels generally require maintenance dredging every one to three years, thus creating a recurring source of dredging work that is typically non-deferrable if optimal navigability is to be maintained. In addition, severe weather such as hurricanes, flooding and droughts can also cause the accumulation of sediments and drive the need for maintenance dredging. Maintenance revenue for the ~~second~~first quarter of ~~2021~~2022 was ~~$37.3~~$19.8 million, down ~~$4.7~~$25.5 million, or ~~11.2%~~56.3%, from

~~$42.0~~ $45.3 million in the ~~second quarter~~same period of ~~2020.~~2021. The decrease in maintenance revenues for the three months ended ~~June 30, 2021~~March 31, 2022 was mostly attributable to a ~~greater amount of~~decrease in revenue earned on projects in ~~Maryland,~~ North Carolina, Louisiana, Texas, Florida, Maryland, New York and ~~Virginia in~~New Jersey from the prior year quarter, when compared to the current year quarter. This decrease was partially offset by higher revenue earned on projects in Florida, Georgia and Louisiana in the current year quarter. Maintenance revenue for the six months ended June 30, 2021 was $82.6 million, a decrease of $1.8 million, or 2.1%, compared to $84.4 million for the comparable period in prior year. The decrease in maintenance revenues for the six months ended June 30, 2021 was mostly due to a greater amount of revenue earned on projects in Maryland and Virginia in the prior year period when compared to the current year. This decrease was partially offset by ~~more~~an increase in revenue earned on ~~projects~~a project in ~~Florida,~~ Georgia and ~~Louisiana~~North Carolina in the current year.

Rivers & lakes dredging and related operations typically consist of lake and river dredging, inland levee and construction dredging, environmental restoration and habitat improvement and other marine construction projects. During the ~~second~~first quarter of ~~2021,~~2022, rivers & lakes revenue was ~~$5.0~~$1.6 million, ~~an increase~~a decrease of ~~$2.5~~$1.8 million, or ~~100.3%~~52.9%, from ~~$2.5~~$3.4 million during the same period of ~~2020.~~2021. The ~~increase~~decrease in river and lakes revenue for the ~~three month~~three-months ended ~~June 30, 2021~~March 31, 2022 was mostly attributable to a decrease in revenue earned on projects in Texas, Kansas and Mississippi from the prior year. This decrease was partially offset by a greater amount of revenue earned on ~~projects~~a project in ~~Mississippi and Texas~~Tennessee in the current year quarter. Rivers & lakes revenue for the six months ended June 30, 2021 was $8.4 million, up $0.9 million, or 12.0%, from $7.5 million for the same period in the prior year. The increase in rivers & lakes revenues for the six months ended June 30, 2021 was mostly due to a greater amount of revenue earned on projects in Mississippi in the current year period, when compared to the prior year. This increase was partially offset by more revenue earned in the San Jacinto project in Texas in the prior year.

Consolidated gross profit for the ~~quarter~~quarters ended ~~June 30,~~March 31, 2022 and March 31, 2021 was ~~$22.9 million, down $10.1 million, or 31% compared to $33.0 million in the same quarter of 2020.~~relatively flat at $33.1 million. Gross profit margin for the three months ended ~~June 30, 2021~~March 31, 2022 was ~~13.5%~~17.0% compared to ~~19.7%~~18.6% in the ~~second quarter~~same period of ~~2020. The lower gross profit experienced for~~2021.

During the three months ended ~~June 30, 2021 was driven by $3.0~~March 31, 2022, general and administrative expenses were $14.6 million, ~~of direct costs related to the third wave of COVID-19 in addition to COVID-19 indirect costs and~~ a decrease ~~in profitability~~ of ~~the Company’s domestic capital and coastal protection dredging projects in the quarter when~~$1.7 million compared to the same period in the prior year, ~~offset slightly by higher gross profit in the maintenance, rivers & lakes and foreign capital dredging projects in the current quarter.~~ ~~Consolidated gross profit for~~ ~~the six months ended June 30, 2021 was~~ ~~$56.0 million, down $45.5 million, or 45%, compared to $101.5 million in the same period of the prior year. Gross profit margin for the~~ ~~six months ended June 30, 2021~~ ~~was down to 16.1% from 26.3% in the same period in prior year.~~ which totaled $16.3 million. The ~~lower gross profit experienced for the six months ended June 30, 2021 was driven by $7.3 million of direct costs related to the third wave of COVID-19 in addition to COVID-19 indirect costs and a~~ decrease in profitability of the Company’s domestic capital, coastal protection and rivers & lakes dredging projects in the quarter when compared to the same period in the prior year, offset slightly by higher gross profit in the maintenance, and foreign capital dredging projects in the current year.

~~During the three and six months ended June 30, 2021,~~ general and administrative expenses ~~were $14.2~~for the quarter was primarily due to $1.1 million in lower share-based compensation expense and ~~$30.5~~$0.8 million ~~respectively, compared to the same periods~~in lower relocation expense in the ~~prior~~current year in which the three and six months totaled $14.8 million and $30.4 million, respectively. For the three and six months ended June 30, 2021, general and administrative expenses include higher technical and consulting expenses related to our engagement with Boston Consulting Group (“BCG”) to assist with evaluating the offshore wind market strategy as well as reviewing other long-term growth strategies for GLDD and higher relocation expense related to the ~~headquarter move to Texas. These increases were offset by lower incentive pay~~Company’s regional office and ~~lower travel expenses.~~headquarters.

Operating income for the ~~second~~first quarter of ~~2021~~2022 was ~~$8.8~~$18.8 million, ~~down $9.5~~up $2.2 million compared to operating income of ~~$18.3~~$16.6 million for the same quarter in ~~2020. Operating income for~~ ~~the~~ ~~six months ended June 30, 2021 was $25.5 million, down $45.8 million from operating income of $71.3 million in the same period of prior year period.~~2021. The ~~decrease~~increase in operating income for the ~~three and six months ended June 30, 2021~~first quarter of 2022 was partially as a result of lower ~~gross profit~~general and administrative expense in the current year when compared to the same period in the prior year.

For the three months ended ~~June 30, 2021,~~March 31, 2022, net interest expense was ~~$6.7~~$4.0 million, ~~relatively flat~~$2.6 million lower compared ~~with $6.7~~to $6.6 million ~~for the prior year quarter. Net interest expense~~ ~~the~~ ~~six months ended June 30, 2021 was $13.2 million, compared with $13.4~~ for the same period in the prior year. The decrease in net interest expense ~~for the three and six months ended June 30, 2021 includes a $1.0 million write-off to extinguishment of subsidiary debt related~~was primarily due to the ~~deferred financing fees~~refinancing of the ~~redeemed 8.000% Senior Notes due 2022 (the “8% Notes”). This expense was offset by the~~senior notes in May 2021 at a lower interest ~~expense from our newly issued $325 million of unsecured 5.25% Senior Notes (the “2029 Notes”).~~rate.

Income tax provision for the three months ended ~~June 30, 2021~~March 31, 2022 was ~~$0.8~~$3.3 million compared to an income tax provision of ~~$3.1~~$1.4 million for the same period in the prior year. ~~For~~ ~~the~~ ~~six months ended June 30, 2021 and 2020, the Company had an income tax provision of $2.2 million and $14.4 million, respectively.~~ The effective tax rate for the ~~six~~three months ended ~~June 30, 2021~~March 31, 2022 was ~~16.9%~~22.9%, ~~down 8.3%~~up 9.3% from the effective tax rate of ~~25.2%~~13.6% for the same period of ~~2020.~~2021. The ~~decrease~~increase in the effective tax rate was primarily due to a one-time benefit associated with a stock compensation tax deduction in the ~~current~~first quarter of the prior year.

Net income for the quarter ended ~~June 30, 2021~~March 31, 2022 was ~~$2.1~~$11.1 million, ~~down $6.9~~up $2.3 million, or ~~77%~~26%, from ~~$9.0~~$8.8 million in the same quarter in the prior year. Diluted earnings per share was ~~$0.03~~$0.17 for the three months ended ~~June 30, 2021,~~March 31, 2022, compared to ~~$0.14~~$0.13 for the three months ended ~~June 30, 2020.~~March 31, 2021. The ~~decrease~~increase in net income for the three months ended ~~June 30,~~March 31, 2021 was primarily due to the decrease in ~~gross profit~~general and administrative expense and net interest expense in the current year ~~quarter.Net~~quarter, partially offset by the higher income ~~for~~ tax provision in the ~~six months ended June 30, 2021~~ ~~was $10.9 million, down $32.0 million, or 75%, from $42.9 million for~~current quarter compared to the same ~~period~~quarter in the prior year. ~~Diluted earnings per share attributable to continuing operations were $0.16 and $0.65 for the~~ ~~six months ended June 30, 2021 and 2020, respectively. The decrease in net income for~~ ~~the six months ended June 30, 2021~~ was driven by the decrease to gross profit mostly. This increase was slightly offset by a $1.5 million increase in other income and a $12.2 million decrease in income tax provision during the current year when compared to the same period in the prior year.

Adjusted EBITDA (as defined on page ~~19)~~17) for the quarter ended ~~June 30, 2021~~March 31, 2022 was ~~$20.2~~$29.7 million, ~~down $7.9~~up $2.9 million, or ~~28%~~11%, from ~~$28.1~~$26.8 million in the same quarter in the prior ~~year quarter.~~year. The ~~decrease~~increase in Adjusted EBITDA during the ~~second~~first quarter of ~~2021~~2022 was driven by the ~~decrease~~increase in gross profit, excluding ~~depreciation. For~~depreciation and the ~~six months ended June 30, 2021, Adjusted EBITDA was $47.1 million, down $42.4 million, or 47%, from $89.5 million during the same period~~decrease in ~~the prior year.~~general and administrative expense.

The following table sets forth, by type of work, the Company’s backlog as of the dates indicated:

	June 30,		December 31,		June 30,		March 31,		December 31,		March 31,
Backlog (in thousands)	2021		2020		2020		2022		2021		2021
Dredging:
Capital - U.S.	$	320,820	$	320,920	$	345,901	$	320,352	$	398,748	$	310,163
Capital - foreign		269		6,865		19,717		—		-		2,077
Coastal protection		51,204		97,986		21,967		120,457		99,048		82,589
Maintenance		67,440		125,090		25,782		31,451		50,966		84,820
Rivers & lakes		14,669		8,515		10,036		1,211		2,826		6,334
Total backlog	$	454,402	$	559,376	$	423,403	$	473,471	$	551,588	$	485,983

The Company’s contract backlog represents its estimate of the revenues that will be realized under the portion of the contracts remaining to be performed. These estimates are based primarily upon the time and costs required to mobilize the necessary assets to and from the project site, the amount and type of material to be dredged and the expected production capabilities of the equipment performing the work. However, these estimates are necessarily subject to variances based upon actual circumstances. Because of these factors, as well as factors affecting the time required to complete each job, backlog is not always indicative of future revenues or profitability. Also, ~~72%~~53% of the Company’s ~~June 30, 2021~~March 31, 2022 dredging backlog relates to federal government contracts, which can be canceled at any time without penalty to the government, subject to the Company’s contractual right to recover the Company’s actual committed costs and profit on work performed up to the date of cancellation. The Company’s backlog may fluctuate significantly from quarter to quarter based upon the type and size of the projects the Company is awarded from the bid market. The Company’s backlog includes only those projects for which the Company has obtained a signed contract with the customer. A quarterly increase or decrease of the Company’s backlog does not necessarily result in an improvement or a deterioration of the Company’s business.

The domestic dredging bid market for the quarter ended ~~June 30, 2021~~March 31, 2022 was ~~$532.4~~$198.2 million, a ~~$103.8~~$16.7 million ~~increase~~decrease compared to the same period in the prior year. Total domestic dredging bid market for the current year period included awards for ~~the third phase of the Mobile Harbor Deepening project, the Golden Triangle Marsh Project, one maintenance~~costal storm risk management project in ~~the gulf region, one rivers & lakes project~~New York and three costal protection projects in ~~Tennessee, one coastal protection project and one maintenance project in Florida.~~North Carolina. For the contracts awarded in the current year, the Company won, ~~65.9%~~89.9%, or ~~$148.1 million, of domestic capital projects, and 36.3%, or $44.1~~$99.0 million, of the coastal protection projects, through ~~June 30, 2021.~~March 31, 2022. The Company won ~~34.5%~~49.9% of the overall domestic bid market for the ~~six~~three months ended ~~June 30, 2021,~~March 31, 2022, which is ~~slightly lower~~higher than the Company’s prior ~~three year~~three-year average of ~~36.6%~~35.0%.Variability in contract wins from quarter to quarter is not unusual and one quarter’s win rate is generally not indicative of the win rate the Company is likely to achieve for a full year. After the end of the quarter, we were awarded the Cape May Beach Renourishment Project for $12.1 million and we were low bidder on the Corpus Christi Phase III Deepening Project for $151.9 million and the Thimble Shoal deepening and renourishment project for $39.5 million.year.

The Company’s contracted dredging backlog was ~~$454.4~~$473.5 million at ~~June 30, 2021~~March 31, 2022 compared to ~~$559.4~~$551.6 million of backlog at December 31, ~~2020.~~2021. These amounts do not reflect approximately ~~$508.6~~$505.3 million of domestic low bids pending formal award and additional phases (“options”) pending on projects currently in backlog at ~~June 30, 2021.~~March 31, 2022. At December 31, ~~2020~~2021 the amount of domestic low bids and options pending award was ~~$472.3~~$567.3 million.

Domestic capital dredging backlog at ~~June 30, 2021~~March 31, 2022 was $78.4 million lower than at ~~the same level compared to~~ December 31, ~~2020. In~~2021. During the ~~six~~three months ended ~~June 30, 2021, the Company was awarded the third phase of the Boston Harbor deepening project. During the six months ended June 30, 2021,~~March 31, 2022, the Company continued to earn revenue on deepening projects in ~~Charleston, Jacksonville,~~Texas, Alabama, Florida, South Carolina, Massachusetts and ~~the gulf region, a~~New Hampshire and Maine, multiple coastal restoration ~~project~~projects in Louisiana, and a liquefied natural gas project in Louisiana. Government funded projects coming into the pipeline include the Norfolk Harbor deepening, Freeport Reaches, as well as additional phases of ~~the~~Mobile deepening and Corpus ~~Christi deepenings, as well as new deepenings for ports in Alabama and the Everglades in Florida.~~Christi. These deepenings continue the trend of ensuring all East Coast and Gulf of Mexico ports will be able to accommodate the deeper draft vessels currently used on several trade routes. In addition, multiple project phases for port deepenings in Norfolk and the Houston ship channel are expected to continue for the next several years. The nation’s governors continue to show commitment to their respective ports through engagement and funding. Finally, Congress has also shown a commitment to ports and waterways, providing record annual budgets for the Corps for port deepening and channel maintenance. In addition to this port work, a greater amount of coastal restoration and rehabilitation projects are being funded in the Gulf Coast region as the states utilize available monies for ecosystem priorities, a portion of which is allocated to dredging.

~~Foreign~~There was no foreign capital dredging backlog at ~~June 30, 2021 was $6.6 million lower than at~~March 31, 2022 and December 31, ~~2020. During the six months ended June 30,~~ 2021 ~~the Company continued to earn revenue on a project~~and there are no future foreign projects in the ~~Middle East which was in backlog at December 31, 2020.~~pipeline.

Coastal protection dredging backlog ~~decreased $46.8~~increased $21.4 million from December 31, ~~2020.~~2021. In the ~~six~~three months ended ~~June 30, 2021,~~March 31, 2022, the Company was awarded ~~two~~three coastal protection projects ~~of $28.5 and $15.6~~totaling $57.8 million in ~~Florida.~~North Carolina and one costal protection project of $37.2 million in New York. During the ~~six~~three months ended ~~June 30, 2021,~~March 31, 2022, the Company continued to earn revenue on coastal protection projects in New Jersey, New York, North Carolina and Florida which were in backlog at December 31, ~~2020.~~2021. Coastal protection and storm impacts continue to provide the major impetus for coastal project investment at federal and state levels. Strong hurricane and storm seasons have resulted in an increase in beach erosion and other damage which adds to the recurring nature of our business and the need for more frequent coastal protection and port maintenance projects. As a result of the extreme storm systems in prior years involving Hurricanes Harvey, Irma, and Maria, the U.S. Congress passed supplemental appropriations for disaster relief and recovery which includes $17.4 billion for the Corps to fund projects that will reduce the risk of future damage from flood and storm events. The Corps is beginning to provide visibility on its plans for this money, and it is expected that approximately $1.8 billion will be allocated to dredging-related work. Most of this work is anticipated to be coastal protection related, but some funding may be provided for channel maintenance. During 2019, an additional $3.3 billion of supplemental appropriations was approved for disaster relief funding as a result of Hurricane Florence and Hurricane ~~Michael.~~Michael.

Maintenance dredging backlog decreased ~~$57.6~~$19.5 million from December 31, ~~2020. In~~2021. During the ~~six~~three months ended ~~June 30, 2021, the Company was awarded one maintenance project of $38.3 in the Gulf region and another one of $3.3 million Florida. During the six months ended June 30, 2021,~~March 31, 2022, the Company continued to earn revenue on two projects in Louisiana and projects in Georgia and North Carolina ~~and Florida which~~that were in backlog at December 31, ~~2020.~~2021. Past WRDA bills called for full use of the HMTF for its intended purpose of maintaining future access to the waterways and ports that support our nation’s economy. On March 27, 2020, the U.S. government enacted the CARES Act which includes a provision that lifts caps on the HMTF, thereby allowing full access to future annual revenues. Through the increased appropriation of HMTF monies, the Company anticipates increased funding for harbor maintenance projects to be let for bid.

Rivers & lakes backlog at ~~June 30, 2021~~March 31, 2022 was ~~up $6.2~~down $1.6 million compared to backlog at December 31, ~~2020. In~~2021. For the ~~six~~three months ended ~~June 30, 2021, the Company was awarded one rivers & lakes project in Tennessee. For the six months ended June 30, 2021,~~March 31, 2022, the Company continued to earn revenue on projects in ~~Texas~~Tennessee and Mississippi which was in backlog at December 31, ~~2020.~~2021.

The Company’s principal sources of liquidity are net cash flows provided by operating activities and proceeds from previous issuances of long-term debt. The Company’s principal uses of cash are to meet debt service requirements, finance capital expenditures, provide working capital and other general corporate purposes.

The Company’s cash provided by or used in operating activities for the ~~six~~three months ended ~~June 30,~~March 31, 2022 and 2021 was the source of $26.3 million and ~~2020 was~~ a use of ~~$35.6 million and a source of $67.5~~$9.2 million in cash, respectively. Normal increases or decreases in the level of working capital relative to the level of operational activity impact cash flow from operating activities. The ~~decrease~~increase in cash provided by operating activities during the ~~six~~three months ended ~~June 30, 2021~~March 31, 2022 compared to the same period in the prior year was ~~driven by lower~~due to an increase in net income ~~in current year, offset partially by lower investment~~as well as a decrease in working capital due to a decrease in accounts receivable during the current year when compared to the same period in the prior year.

The Company’s cash flows used in investing activities for the ~~six~~three months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~ totaled ~~$64.6~~$27.8 million and ~~$20.1~~$27.0 million, respectively. Investing activities primarily relate to normal course upgrades and capital maintenance of the Company’s dredging fleet. The Company ~~announced~~is currently building a ~~Shipyard Contract for~~ 6,500 cubic yard ~~Trailing Suction Hopper Dredge~~trailing suction hopper dredge with expected delivery in ~~June 2020 and, later, in December 2020~~the first quarter of 2023. In November 2021, the Company ~~announced the design and development of~~entered into a $197 million contract with Philly Shipyard Inc. to build the first U.S. flagged Jones Act compliant, inclined fall-pipe vessel for subsea rock installation for wind turbine foundations to support the new U.S. offshore wind ~~industry. During~~industry with expected delivery in the ~~six months ended June 30,~~second half of 2024. In July 2021, the Company ~~has invested $14.0 million towards these new vessels. In addition, the Company spent $16.4 million in the period ended June 30, 2021~~announced a contract to ~~acquire two dredges that had previously been leased and $6.9 million to acquire~~

build two multifunctional all-purpose vessels (“multicats”). ~~The~~During the three months ended March 31, 2022, the Company ~~did not receive any proceeds from dispositions of property~~invested $8.0 million in a new hopper dredge, $6.2 million in multicats and ~~equipment in the current year period compared to $0.4~~scows and $0.5 million in the ~~prior year period.~~rock installation vessel.

The Company’s cash flows used in financing activities for the ~~six~~three months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~ totaled ~~$6.7~~$1.4 million and ~~$0.8~~$2.5 million, respectively. The ~~increase~~decrease in cash used in financing activities relates to ~~$4.4 million of deferred financing fees paid related to the newly issued $325 million of the 2029 Notes and~~ changes in the taxes paid on settlement of vested shares awards ~~offset slightly by increase~~and a decrease in cash from the Company’s employee stock purchase plan. ~~Of the previously announced $75.0 million share repurchase program, the Company repurchased $3.9 million of common stock in the third quarter of 2020 and none during the period ended June 30, 2021.~~

The Company maintains a favorable cash on hand position and revolver availability and as a result is well positioned for changes in the current economic environment. ~~In the current year,~~To date, the Company ~~began to experience more considerable~~has had various operational ~~interruptions and direct costs related to the third wave~~or financial impacts as a result of the ~~coronavirus (COVID-19) pandemic. The impacted projects are now back in operation but the Company~~ongoing COVID-19 pandemic and will continue to assess the potential economic impact that the virus and ~~pandemic~~actions taken to contain it could have on the Company’s operations and liquidity.

In May 2021, the Company sold $325 million of ~~2029~~unsecured 5.25% Senior Notes (the “2029 Notes”) pursuant to a private offering. The 2029 Notes were priced to investors at par and will mature on June 1, 2029. The Company used the net proceeds from the offering, together with cash on hand, to redeem ~~all~~the $325 million aggregate principal amount of its outstanding ~~8% Notes.~~8.000% Senior Notes due 2022.

The 2029 Notes are senior unsecured obligations of the Company and are guaranteed on a senior unsecured basis by the guarantors and any other subsidiary guarantors that from time to time become parties to the indenture. The terms of the indenture, among other things, limit the ability of the Company and its restricted subsidiaries to (i) pay dividends, or make certain other restricted payments or investments; (ii) incur additional indebtedness and issue disqualified stock; (iii) create liens on their assets; (iv) transfer and sell assets; (v) enter into certain business combinations with third parties or enter into certain other transactions with affiliates; (vi) create restrictions on dividends or other payments by the Company’s restricted subsidiaries; and (vii) create guarantees of indebtedness by restricted subsidiaries. These covenants are subject to a number of important limitations and exceptions that are described in the indenture.

Refer to Note 4, Long-term debt, in the Notes to Condensed Consolidated Financial Statements for discussion of the Company’s Amended Credit Agreement. Additionally, refer to Note 8, Commitments and contingencies, in the Notes to Condensed Consolidated Financial Statements for discussion of the Company’s surety agreements.

The Company intends to upgrade its existing domestic fleet by acquiring or building new vessels, equipment and technology to increase productivity and efficiency and further enhance safety. Existing cash on hand, future net cash flows, debt financing and new leases are all available funding resources from which the Company will evaluate its options when considering these upgrades.

The Company believes its cash and cash equivalents, its anticipated cash flows from operations and availability under its revolving credit facility will be sufficient to fund the Company’s operations, capital expenditures and the scheduled debt service requirements for the next twelve months. Beyond the next twelve months, the Company’s ability to fund its working capital needs, planned capital expenditures, scheduled debt payments and dividends, if any, and to comply with all the financial covenants under the Amended Credit Agreement and bonding agreements, depends on its future operating performance and cash flows, which in turn, are subject to prevailing economic conditions and to financial, business and other factors, some of which are beyond the Company’s control.

In preparing its consolidated financial statements, the Company follows GAAP, which is described in Note 1, Basis of presentation, to the Company’s December 31, ~~2020~~2021 Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K. The application of these principles requires significant judgments or an estimation process that can affect the results of operations, financial position and cash flows of the Company, as well as the related footnote disclosures. The Company continually reviews its

accounting policies and financial information disclosures. Except as noted in Note 1, Basis of presentation, of the Company’s financial statements, there have been no material changes in the Company’s critical accounting policies or estimates since December 31, ~~2020.~~2021.

The market risk of the Company’s financial instruments as of ~~June 30, 2021~~March 31, 2022 has not materially changed since December 31, ~~2020.~~2021. The market risk profile of the Company on December 31, ~~2020~~2021 is disclosed in Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” of the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2020.~~2021.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures, as required by Rule 13a-15(b) and 15d-15(b) under the Securities Exchange Act of 1934 (the “Exchange Act”) as of ~~June 30, 2021.~~March 31, 2022. Our disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports that we file or submit under the Exchange Act a) is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding disclosure and b) is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

Our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of ~~June 30, 2021~~March 31, 2022 in providing such a reasonable assurance.

There have been no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the fiscal quarter ended ~~June 30, 2021~~March 31, 2022 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

See Note 8, Commitments and contingencies, in the Notes to Condensed Consolidated Financial Statements.

There have been no material changes ~~except for the following,~~ during the ~~six~~three months ended ~~June 30, 2021~~March 31, 2022 to the risk factors previously disclosed in Item 1A. “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2020, as supplemented by the risk factor previously disclosed in Item 1A. “Risk Factors” in the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30,~~ 2021.

~~The Company could face liabilities and/or damage to our reputation as a result of certain legal and regulatory proceedings, including a recent legal proceeding in Louisiana.~~

The Company operates in a highly regulated environment with constantly evolving legal and regulatory frameworks. From time to time, the Company is subject to legal and regulatory proceedings in the ordinary course of its business. These include proceedings relating to aspects of its businesses that are specific to the Company and proceedings that are typical in the businesses in which it operates.

~~In particular,~~ on April 22, 2021, the U.S. Attorney’s Office for the Eastern District of Louisiana filed a bill of information against the Company charging the Company with a negligent discharge violation of the Clean Water Act arising from a September 2016 oil spill. The spill occurred during the Company’s Cheniere Ronquille project and resulted in the discharge of around 160 barrels of crude oil in Bay Long, Louisiana. The Company has cooperated with the U.S. Attorney’s Office and other relevant agencies in their investigation of the oil spill and has agreed to plead guilty to the misdemeanor violation alleged in the bill of information. As a result, the government may initiate suspension or debarment proceedings against us, which might prohibit us from bidding for, entering into or completing certain government projects. These suspension or debarment actions may be limited in time and scope, but the Company cannot guarantee that any such action will not have a material adverse effect on its business, results of operations, cash flows or financial condition. In addition, this matter may lead to negative publicity and press speculation about the Company, whether valid or not, which may harm our reputation and be damaging to our business, results of operations, cash flows or financial condition.

The Company is currently a defendant in a number of other litigation matters, including those described in Note 8, Commitments and contingencies, in the Notes to Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q. In certain of these matters, the plaintiffs are seeking large and/or indeterminate amounts of damages. These matters are also subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved or settled adversely to the Company. An adverse outcome in a legal or regulatory matter could, depending on the facts, have an adverse effect on the Company’s business, results of operations, cash flows or financial condition.

Furthermore, whether the ultimate outcomes are favorable or unfavorable, these matters can also have significant adverse reputational impacts, including negative publicity and press speculation about the Company, whether valid or not, which may be damaging to the Company’s business, results of operations, cash flows or financial condition.

~~The following table provides information regarding repurchases of the Company’s common stock by the Company during the quarter ended June 30, 2021:~~None.

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.

Delaware		20-5336063
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

9811 Katy Freeway, Suite 1200, Houston, TX		77024
(Address of principal executive offices)		(Zip Code)

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock (Par Value $0.0001)		GLDD		Nasdaq Stock Market, LLC

Large accelerated filer	☐☒	Accelerated filer	☒☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

		Page

	Part I Financial Information (Unaudited)	3

Item 1	Financial Statements	3

	Condensed Consolidated Balance Sheets at ~~June 30, 2021~~March 31, 2022 and December 31, ~~2020~~2021	3

	Condensed Consolidated Statements of Operations for the Three ~~and Six~~ Months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~	4

	Condensed Consolidated Statements of Comprehensive Income for the Three ~~and Six~~ Months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~	5

	Condensed Consolidated Statements of Equity for the Three ~~and Six~~ Months ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~	6

	Condensed Consolidated Statements of Cash Flows for the ~~Six~~Three Months Ended ~~June 30,~~March 31, 2022 and 2021 ~~and 2020~~	7

	Notes to Condensed Consolidated Financial Statements	8

Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	15

Item 3	Quantitative and Qualitative Disclosures About Market Risk	22

Item 4	Controls and Procedures	2322

	Part II Other Information	2423

Item 1	Legal Proceedings	2423

Item 1A	Risk Factors	2423

Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	2423

Item 3	Defaults Upon Senior Securities	2523

Item 4	Mine Safety Disclosures	2523

Item 5	Other Information	2523

Item 6	Exhibits	2624

	Signature	2725

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 Aggregate Dollar Value That May Yet Be Purchased Under the Plans or Programs (1)
April 1, 2021 – April 30, 2021		0	$	-		0	$	71,127,473
May 1, 2021 - May 31, 2021		0	$	-		0	$	71,127,473
June 1 2021 - June 30, 2021		0	$	-		0	$	71,127,473
Total		0	$	-		0	$	71,127,473

Number			Document Description

~~4.1~~31.1			Indenture, dated May 25, 2021, among Great Lakes Dredge & Dock Corporation, as Issuer, the guarantors party thereto, and Wells Fargo Bank, National Association, as Trustee, relating to the 2029 Notes (incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 25, 2021 (Commission file no. 001-33225))

~~4.2~~			Form of 2029 Notes (included in Exhibit 4.1) (incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 25, 2021 (Commission file no. 001-33225))

~~10.1~~			Great Lakes Dredge & Dock Corporation 2021 Long-Term Incentive Plan (incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 7, 2021 (Commission file no. 001-33225)) †

~~10.2~~			Purchase Agreement, dated May 12, 2021, by and among Great Lakes Dredge & Dock Corporation, certain subsidiary guarantors named therein and BofA Securities, Inc., as representative of the initial purchasers named therein. (incorporated by reference to Great Lakes Dredge & Dock Corporation’s Current Report on Form 8-K filed with the Commission on May 18, 2021 (Commission file no. 001-33225)) †

~~31.1~~			Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *

31.2			Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *

32.1			Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. **

32.2			Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. **

101			Interactive Data Files pursuant to Rule 405 of Regulation S-T formatted in Inline Extensible Business Reporting Language ("Inline XBRL") *

104			Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101) *

	Great Lakes Dredge & Dock Corporation
	(registrant)

	By:		/s/ S~~Mark W. Marinko~~cott Kornblau
			~~Mark W. Marinko~~Scott Kornblau
			Senior Vice President, ~~and~~ Chief Financial Officer and Treasurer
			(Principal Financial ~~and Accounting~~ Officer and Duly Authorized Officer)