, ^J , ^.^vv-v 



>N-V-VSJ V_<X' 



.. CX^, t^.C.^r U-cU, ^. ^^gfiffl* 





R^3 



REPAIR, EVALUATION, MAINTENANCE, AND 

 REHABILITATION RESEARCH PROGRAM 



TECHNICAL REPORT REMR-CO-12 



STABILITY OF TOE BERM ARMOR STONE AND 



TOE BUTTRESSING STONE ON RUBBLE-MOUND 



BREAKWATERS AND JETTIES 



Physical Model Investigation 



by 



Dennis G. Markle 



Coastal Engineering Research Center 



DEPARTMENT OF THE ARMY 



Waterways Experiment Station, Corps of Engineers 



3909 Halls Ferry Road, Vicksburg, Mississippi 39180-6199 



September 1989 

 Final Report 



Approved For Public Release; Distribution Unlimited 



Prepared for DEPARTMENT OF THE ARMY 



US Army Corps of Engineers 



Washington, DC 20314-1000 



under Civil Works Research Work Unit 32278 



