UNCLASSIFIED 



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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



TP 76-19 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



OVERLAY OF LARGE, PLACED QUARRYSTONE AND BOULDERS 

 TO INCREASE RIPRAP STABILITY 



5. TYPE OF REPORT & PERIOD COVERED 



Technical Paper 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfaJ 



Bruce L. McCartney 

 John P. Ahrens 



8. CONTRACT OR GRANT NUMBERfs) 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-SP) 



Kingman Building, Fort, Belvoir, Virginia 22060 



F31236 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



December 1976 



13. NUMBER OF PAGES 



34 



14. MONITORING AGENCY NAME ft ADDRESSf;/ d///eren( from Controlling Office) 



15. SECURITY CLASS, (ol this roporf; 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (of this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (of the abs 



ottered In Block 20, if different from Report) 



16. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue on reverse side if necessary and identify by block number) 



Armor stone Quarrystone 



Boulders Riprap 



Oahe Reservoir, South Dakota Wave forces 

 Overlay 



20. ABSTRACT (Continue an reverse side If necessary and identify by block number) 



This report describes the wave tank tests and field performance of a 

 single layer of large armor stone used as a protective overlay on under- 

 designed riprap. The resistance of the overlay to wave attack was determined 

 by small-scale model and prototype-scale wave tank tests at CERC. 



stone overlay concept was successfully used to repair a damaged riprap 

 revetment on Oahe Reservoir, South Dakota (App. A). Design information and 



(continued') 



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