FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Mackie Douglas B   2. Issuer Name and Ticker or Trading Symbol Great Lakes Dredge & Dock CORP [GLDD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) GREAT LAKES DREDGE & DOCK CORPORATION, 2122 YORK ROAD 3. Date of Earliest Transaction (Month/Day/Year) 06/22/2007 (Street) OAKBROOK,, IL 60523 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/22/2007   X(1)   6,000 A $ 5 12,000 I Common Stock held by the wife of Douglas B. Mackie Common Stock               18,909 I Common Stock held by Christopher T. Mackie 1998 Trust Common Stock               18,909 I Common Stock held by Kathleen J. Mackie 1998 Trust Common Stock               18,909 I Common Stock held by Natalie A. Mackie 1998 Trust Common Stock               24,270 I Common Stock held by Madeline C. Mackie 1998 Trust Common Stock               24,270 I Common Stock held by Philip D. Mackie 1998 Trust Common Stock               397,945 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Warrants to purchase Common Stock, par value $0.0001

$ 5

06/22/2007

X

6,000

12/21/2006

07/19/2007

Common Stock, par value $0.0001

6,000

$ 0

0

I

Wife of Douglas B. Mackie

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Mackie Douglas B GREAT LAKES DREDGE & DOCK CORPORATION 2122 YORK ROAD OAKBROOK,, IL 60523	X		President and CEO

Signatures

/s/Douglas B. Mackie		06/26/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Mr. Mackie's wife converted warrants to common stock as a result of the warrant call by Great Lakes Dredge & Dock Corporation.

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