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REPORT DOCUMENTATION PAGE 



Form Approved 

 OMB No 07040188 

 Exp Date )un30, 1986 



1a REPORT SECURITY CLASSIFICATION 



Unclassified 



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 CERC-88-16 



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 (G(y, State, and ZIP Code) 

 PO BOX 631 



Vicksburg, MS 39181-0631 



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



Washington, DC 20314-1000 



10. SOURCE OF FUNDING NUMBERS 



31232 



11 TITLE (Include Security Classification) 



Side-Scan Sonar Applications for Evaluating Coastal Structures 



12 PERSONAL AUTHOR(S) 



Clausner. James E. 



Pop?, Joan, 



13a TYPE OF REPORT 



Final report 



13b TIME COVERED 

 FROM ' 



14 DATE OF REPORT (Year, Month, Day) 15 PAGE COUNT 

 November 1Q88 



16. SUPPLEMENTARY NOTATION 



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) 



Coastal structure inspection 

 Jetties and breakwaters 

 Side-scan sonar 



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



Applications of side-scan sonar for inspecting coastal structures were evaluated. 

 Results were based on 6 years of structure inspections, including structures on the Atlan- 

 tic, Pacific, Gulf, and Great Lakes coasts of the United States. Most of the structures 

 inspected were Jetties and breakwaters; however, applications for vertical wall structures 

 and dredged material disposal sites are presented. Applications discussed include recon- 

 naissance, inspection, and monitoring. Side-scan sonar is most useful as a reconnaissance 

 and inspection tool, allowing long sections of coastal structures to be viewed quickly, at 

 relatively low cost. Operational and interpretation techniques are discussed. Other 

 supplementary tools and techniques, divers, ROV's, and sediment samples are often needed 

 to verify questionable side-scan images. Presently, only qualitative monitoring, such as 

 toe failures and slope changes, is possible using side-scan sonar. 



20 DISTRIBUTION /AVAILABILITY OF ABSTRACT 



UNCLASSIFIED/UNLIMITED □ SAME AS RPT Q DTIC USERS 



21 



21 ABSTRACT SECURITY CLASSIFICATION 



JfrtttfthblMu 



22a NAME OF RESPONSIBLE INDIVIDUAL 



ude Area Code) 22c OFFICE SYMBOL 



DDFORM 1473, 84 mar 



83 APR edition may be used until exhausted 

 All other editions are obsolete. 



SECURITY CLASSIFICATION OF THIS PAGE 



Unclassified 



0301 OOIIEBO 4 



