Unclassified 



DATA LIBRARY 



Woods Hole Oceanographic Institution 



SECURITY CLASSIFICATION OF THIS PAGE (When Data 



inlered) 





REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



Technical Report CERC-85-8 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (end Sublllle) 



BREAKWATER REHABILITATION STUDY, 

 CRESCENT CITY HAEBOR, CALIFORNIA; 

 Coastal Model Investigation 



5. TYPE OF REPORT a PERIOD COVERED 



Final report 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORrs; 



R. Clay Baumgartner 

 Robert D, Carver 

 D. Donald Davidson 



8. CONTRACT OR GRANT NUMBERfs; 



Intra-Army Order 

 No. REV 84-13 

 dated 23 Jan 1984 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



US Army Engineer Waterways Experiment Station 



Coastal Engineering Research Center 



PC Box 631, Vicksburg, Mississippi 39180-0631 



10. PROGRAM ELEMENT. PROJECT, TASK 

 AREA a WORK UNIT NUMBERS 



11. CONTROLLING OFFICE NAME AND ADDRESS 



US Army Engineer District, Los Angeles 

 Los Angeles, California 90053 



12. REPORT DATE 



November 1985 



13. NUMBER OF PAGES 



307 



14. MONITORING AGENCY NAME & ADDRESSf// dlHerent Irom Controlling Olllce) 



15. SECURITY CLASS, (ol this report) 



Unclassified 



15a. DECLASSIFI CATION/ DOWN GRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (ol this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract entered In Block 20, It dJIIerent Irom Report) 



18. SUPPLEMENTARY NOTES 



Available from National Technical Information Service, 5285 Port Royal Road, 

 Springfield, Virginia 22161. 



19. KEY WORDS (Continue on reverse side II necessary and Identity by block number) 



Breakwaters (LC) 



Harbors — Maintenance and repair (LC) 

 Harbors — California — Crescent City (LC) 

 Crescent City (Calif .)— Harbor (LC) 



20. ABSTRACT fCozrt&ije flzs r«v«rs« sft]fi9 ff rte^ce^eary and Identity by block number) 



An undistorted scale hydraulic model study was conducted to develop an 

 adequate repair plan for a section of the Crescent City breakwater which was 

 armored with dolosse. The damaged area was to be repaired with M2-ton dolos. 

 It was desired to quantify the number of armor units required, the optimum 

 slope on which to place the dolosse, overall constructability , and methods 

 of stabilizing the transition areas. Based on results of model tests, a 

 combination of trenching and buttressing with 25-ton armor stone is a con- 

 structable method of stabilizing the transition area. 



1473 



EDITION OF » NOV 65 IS OBSOLETE 



Unclassified 



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