UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	August 17, 2017 3:00 P.M.

Form:	S-4
CIK: 0001372020 Company Name: Great Lakes Dredge & Dock CORP File Number: 333-219880
CIK: 0001526363 Company Name: Great Lakes Dredge & Dock Company, LLC File Number: 333-219880-05
CIK: 0001140031 Company Name: GREAT LAKES DREDGE & DOCK ENVIRONMENTAL, INC File Number: 333-219880-04
CIK: 0001639817 Company Name: Great Lakes Environmental & Infrastructure Solutions, LLC File Number: 333-219880-03
CIK: 0001639815 Company Name: Great Lakes Environmental & Infrastructure, LLC File Number: 333-219880-02
CIK: 0001526375 Company Name: NASDI Holdings, LLC File Number: 333-219880-01