REPORT DOCUMENTATION PAGE 



Form Approved 

 0MB No. 0704-0188 



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 Office of Management and Budget, Papen«ork Reduction Project (0704-0188), Washington, DC 20503. 



1. AGENCY USE ONLY ^Leai'e b/anfc; 



2. REPORT DATE 



May 1999 



3. REPORT TYPE AND DATES COVERED 



Final report 



4. TITLE AND SUBTITLE 



Sedimentation and Hydrodynamic Study of U.S. Coast Guard Station Boat 

 Basin, Port Huron, Michigan 



5. FUNDING NUMBERS 



6. AUTHOR(S) 



Robert R. Bottin, Jr., Gregory L. Williams 



7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 



U.S. Army Engineer Waterways Experiment Station 

 3909 Halls Ferry Road 

 Vicksburg, MS 39180-6199 



8. PERFORMING ORGANIZATION 

 REPORT NUMBER 



Technical Report CHL-99-10 



9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 

 U.S. Army Engineer District, Detroit 

 P.O. Box 1027, Detroit, MI 48231-1027 



U.S. Coast Guard Civil Engineering Unit, Cleveland 

 Cleveland, OH 44199-2060 



10. SPONSORING/MONITORING 

 AGENCY REPORT NUMBER 



11. SUPPLEMENTARY NOTES 



Available from National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161. 



12a. DISTRIBUTION/AVAILABILITY STATEMENT 



Approved for public release; distribution is unlimited. 



12b. DISTRIBUTION CODE 



13. ABSTRACT (Maximum 200 words) 



The U.S. Coast Guard Station, Port Huron, Michigan, is located at the southern end of Lake Huron near the lake's 

 transition to the St. Clair River. A co-located small boat basin used for berthing search and rescue vessels has experienced 

 chronic shoaling since its construction 1931. Multiple basin configuration changes have been made with the intention of 

 reducing shoaling and/or annual dredging requirements to an acceptable level and to reduce wave energy, which causes 

 mooring problems in the harbor. The location of the basin at this dynamic lake-to-river transition site is particularly 

 problematic because of the strong unidirectional currents that influence sediment transport and navigation into and out of the 

 basin. A field study and sediment-transport analysis examined the bathymetry and hydrodynamics of lower Lake Huron as 

 they relate to the shoaling and resonance problems inside the basin. In addition, a physical model study identified a modified 

 basin configuration that reduces both entrance shoaling and undesirable wave energy in the basin. 



14. SUBJECT TERMS 



Field investigations Sediment movement patterns 



Hydrodynamics Sedimentation 



Physical model investigation Vessel-generated waves 



Port Huron, MI Wind waves 



River currents Wave-induced currents 



15. NUMBER OF PAGES 



161 



16. PRICE CODE 



17. SECURITY CLASSIFICATION 

 OF REPORT 



UNCLASSIFIED 



18. SECURITY CLASSIFICATION 

 OF THIS PAGE 



UNCLASSIFIED 



19. SECURITY CLASSIFICATION 

 OF ABSTRACT 



20. LIMITATION OF ABSTRACT 



NSN 7540-01 -280-5500 



Standard Form 298 (Rev. 2-i 



Prescribed by ANSI Std. Z39-18 

 298-102 



