Unclassified 



SECURITY CLASSIFICATION OF THIS PAGE 



REPORT DOCUMENTATION PAGE 



1a. REPORT SECURITY CLASSIFICATION 



Unclassified 



Form Approved 

 0MB No 0704-0188 



lb 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 NUMBER{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 (Crty, State, and ZIP Code) 



PO Box 631 



Vicksburg, MS 39181-0631 



7b. ADDRESS (Oty, State, and ZIP Code) 



9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 



8a. NAME OF FUNDING /SPONSORING 

 ORGANIZATION US Army 

 Corps of Engineers 



8b- OFFICE SYMBOL 

 (If applicable) 



8c. ADDRESS (0«y, State, and ZIP Code) 



Washington, DC 20314-1000 



10. SOURCE OF FUNDING NUMBERS 



See reverse 



1 1 TITLE (Include Security Classification) 

 Case Histories of Corps Breakwater and Jetty Structures; Report 8: 

 Valley Division 



Lower Mississippi 



12. PERSONAL AUTHOR(S) 

 Sargent, Francis E.; Bottin, Robert R. , Jr. 



Repc 



13a. TYPE OF REPORT 13b. TIME COVERED 14. DATE OF REPORT {Year, Month, Day) 15. PAGE COUNT 

 ort 8 of a series PROM Feb 86 TO Jul 8 6 January 1989 55 



16. SUPPLEMENTARY NOTATION ^ report of the Coastal Problem Area of the Repair, Evaluation, Main- 

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

 Information Service. 5285 Port Royal Road, Springfield. VA 22161. 



COSATI CODES 



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



See reverse 



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



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

 (Corps) breakwater and jetty structures at nine Corps divisions. Herein, case histories are 

 presented for 10 jetty structures located within the US Army Engineer Division. Lower 

 Mississippi Valley (LMVD) . which encompasses the gulf coast of Louisiana. Presently, there 

 are approximately over 153.000 lin ft of jetty structures managed by LMVD. These structures 

 are predominantly of rubble-mound construction. Seven of the projects have undergone repair 

 and/or modification during their lifetimes. Most of this work has consisted of placing 

 additional stone to bring structures up to grade. Subsidence of structures, due mainly to 

 unconsolidated silts and clays of the underlying foundation, appears to be the principal 

 cause of deterioration. In particular, the jetties at Southwest Pass have a very extensive 

 repair history. 



20. DISTRIBUTION /AVAILABILITY OF ABSTRACT 

 C3 UNCLASSIFIED/UNLIMITED D SAME AS RPT 



n DTIC USERS 



21 ABSTRACT SECURITY CLASSIFICATION 

 Unclassified 



22a. NAME OF RESPONSIBLE INDIVIDUAL 



22b TELEPHONE r/nc/ude Area Code) 22c OFFICE SYMBOL 



DD Form 1473, JUN 86 



Previous editions are obsolete. 



SECURITY CLASSIFICATION OF THIS PAGE 

 Unclassified 



