REPORT DOCUMENTATION PAGE 



Form Approved 

 OMB No. 0704-0188 



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 collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate tor Information Operations and Reports, 1215 Jefferson 

 Davis Highway. Suite 1204. Arlington. VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188). Washington. DC 20503. 



1. AGENCY USE ONLY (Leave blank) 



2. REPORT DATE 



August 1993 



3. REPORT TYPE AND DATES COVERED 



Final report 



4. TITLE AND SUBTITLE 



Revetment Stability Tests for Sargent Beach, Texas 



6. AUTHOR(S) 



Robert D. Carver, Willie J. Dubose, 

 John M. Heggins, Brenda J. Wright 



5. FUNDING NUMBERS 



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



U.S. Army Engineer Waterways Experiment Station 



Coastal Engineering Research Center 



3909 Halls Ferry Road, Vicksburg, MS 39180-6199 



8. PERFORMING ORGANIZATION 

 REPORT NUMBER 



Technical Report 

 CERC-93-14 



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



U.S. Army Engineer District, Galveston 

 Galveston, TX 77550 



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 objective of this study was to investigate, via a two-dimensional (2-D) coastal model, alternate designs for 

 the proposed revetment. Tests were conducted at a geometrically undistorted scale of 1:24, model to prototype. 

 Based on test results, it was concluded that: 



a. Four- to six-ton armor stone is stable for the maximum wave heights that can be expected to occur for 8- 

 and 10-sec waves at still-water levels (swl's) of +4.0 to +14.0 ft mean low tide (mlt) with assumed scour 

 depths of -3.6 and -8.6 ft mlt. 



b. Stability of the original concrete blocks, which were 6.0 ft by 5.5 ft by 2.5 ft and had percent porosity, 

 was only marginally acceptable for the maximum wave heights that can be expected to occur for 8- and 

 10-sec waves at swl's of +4.0 to +14.0 ft mlt with an assumed scour depth of -3.6 ft mlt. 



c. Several modified block plans were tested and it was determined that the optimum block size was 5.75 ft 

 by 5.75 ft by 2.5 ft. These blocks, weighing 6 tons and having a porosity of 4 percent, should prove 

 stable for the maximum wave heights that can be expected to occur for 8- to 10-sec waves at swl's of 

 +4.0 to +14.0 ft mlt with an assumed scour depth of -10 ft mlt. 



14. SUBJECT TERMS 



Concrete blocks 

 Revetment 



Sargent Beach, Texas 

 Stone armor 



15. NUMBER OF PAGES 



68 



16. PRICE CODE 



17. SECURITY CLASSIFICATION 

 OF REPORT 



UNCLASSIFIED 



18. SECURITY CLASSIFICATION 

 OF THIS PAGE 



UNCLASSIFIED 



SECURITY CLASSIFICATION 

 OF ABSTRACT 



20. LIMITATION OF ABSTRACT 



NSN 7540-01-280-5500 



Standard Form 298 (Rev 2-89) 



Prescribed by ANSI Std Z39-I8 

 298-102 



