Edgar Filing: Great Lakes Dredge & Dock CORP

Ownership Submission

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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3235-0287

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

GRISSOM DOUGLAS C

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
_____ Officer (give title below)	_____ Other (specify below)

(Last)

(First)

(Middle)

GREAT LAKES DREDGE & DOCK CORPORATION, 2122 YORK ROAD

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2007

(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	03/19/2007		J		101,876	A	$ 5.803 ⁽¹⁾	26,708,402	I	See Footnote ⁽²⁾

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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

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
GRISSOM DOUGLAS C GREAT LAKES DREDGE & DOCK CORPORATION 2122 YORK ROAD OAKBROOK,, IL 60523	X

Signatures

/s/ Douglas C. Grissom		03/21/2007
^**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)	The reported shares were acquired as a result of the post-closing adjustment contained in a merger agreement. No additional consideration was paid for such shares. The merger agreement provided that the shares would be issued based on a formula that assumed a market price per share of $5.803, the price on the date of the merger. The right to receive additional shares became fixed and irrevocable on December 26, 2006, the date of the merger.
(2)	Madison Dearborn Capital Partners, IV, L.P. ("MDCP") is the record owner of the 26,708,402 shares set forth herein. The shares held by MDCP may be deemed to be beneficially owned by Madison Dearborn Partners, IV, L.P. ("MDP"), the sole general partner of MDCP. The reporting person is a managing director of the general partner of MDP. The reporting person expressly disclaims beneficial ownership of the shares owned by MDCP, except to the extent of his pecuniary interest.

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