Unclassified 



SECURITY CLASSIFICATION OF THIS PAGE 



REPORT DOCUMENTATION PAGE 



Form Approved 

 OMBNo 07040t88 

 Exp Date Jun30, 1986 



la. REPORT SECURITY CLASSIFICATION 



Unclassified 



1b RESTRICTIVE MARKINGS 



2a. SECURITY CLASSIFICATION AUTHORITY 



2b DECLASSIFICATION /DOWNGRADING SCHEDULE 



3. DISTRIBUTION /AVAILABILITY OF REPORT 



Approved for public release; distribution 

 unlimited. 



4 PERFORMING ORGANIZATION REPORT NUM8ER(S) 



Technical Report REMR-CO-3 



5. MONITORING ORGANIZATION REPORT NUMBER(S) 



6a. NAME OF PERFORMING ORGANIZATION 



USAEWES, Coastal Engineering 

 Research Center 



6b. OFFICE SYMBOL 

 (If applicable) 



7a. NAME OF MONITORING ORGANIZATION 



6c. ADDRESS {City, State, and ZIP Code) 



PO Box 631 



Vicksburg, MS 39181-0631 



7b. ADDRESS (City, State, arvi ZIP Code) 



8a. NAME OF FUNDING/SPONSORING 

 ORGANIZATION 



US Army Corps of Engineers 



8b. OFFICE SYMBOL 

 (If applicable) 



9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 



8c. ADDRESS fOfy, State, and Z/P Code) 



Washington, DC 20314-1000 



10. SOURCE OF FUNDING NUMBERS 



See reverse 



11. TITLE (Include Security Classification) 



Case Histories of Corps Breakwater and Jetty Structures; Report 6; North Pacific Division 



12. PERSONAL AUTHOR(S) 



Ward, Donald L. 



13a. TYPE OF REPORT 

 Rppnrt 6 of a ser 



les 



13b TIME COVERED 14 DATE OF REPORT (Year, Month, Day) 15 PAGE COUNT 



FROM Aug 86 TO Jun 87 November I988 182 



16. SUPPLEMENTARY NOTATION A report of the Coastal Problem Area of the Repair, Evaluation, 

 Maintenance, and Rehabilitation (REMR) Research Program. Available from National Technical 

 Tnfr.rmatinn Service. ^286 Port Roval Road. Springfield. VA 22161. 



COSATI CODES 



18. SUBJECT TERMS (.Continue on reverse if necessary and identify by block numtyer) 



Breakwater Rubble-mound construction 

 Jetty Structural deterioration 

 North Pacific Division 



19. ABSTRACT (Continue on reverse if necessary and identify by block number) 



This report is sixth in a series of case histories of US Army Corps of Engineers 

 (Corps) breakwater and Jetty structures at nine Corps divisions. Chronological histories 

 are presented for 14 breakwater and jetty projects located within the US Army Engineer 

 Division, North Pacific (NPD), which includes the Portland, Seattle, and Alaska Districts. 

 The projects currently include 68 breakwaters and 35 Jetties. Nearly all of the structures 

 are of rubble-mound construction, although steel pilings, steel sheetpilings, timber 

 pilings, and concrete have also been used. Localized damage from wave attack and scour near 

 the heads of the structures appears to be the major cause of structural deterioration. 



20. DISTRIBUTION/AVAILABILITY OF ABSTRACT 

 E UNCLASSIFIED/UNLIMITED D SAME AS RPT, 



n DTIC USERS 



22a. NAME OF RESPONSIBLE INDIVIDUAL 



21. ABSTRACT SECURITY CLASSIFICATION 



Unclassified 



22b TELEPHONE (Include Area Code) 22c OFFICE SYMBOL 



DD FORM 1473, 84 mar 



83 APR edition may be used until exhausted 

 AM other editions are obsolete. 



SECURITY CLASSIFICATION OF THIS PAGE 



Unclassified 



