PREFACE 



Authority to carry out this study was provided to the US Army Engineer 

 Waterways Experiment Station (WES) Coastal Engineering Research Center (CERC) 

 by the US Army Corps of Engineers (USACE) , under the Repair, Evaluation, 

 Maintenance, and Rehabilitation (REMR) Research Program Civil Works Research 

 Work Unit 32278, "Rehabilitation of Rubble -Mound Structure Toes." 



Physical model tests of both toe berm and toe buttressing stone for 

 rubble -mound coastal structures were conducted under the general direction of 

 Mr. James E. Crews and Dr. Tony C. Liu, REMR Overview Committee, USACE; and 

 Messrs. Jesse A Pfeiffer, Jr., Directorate of Research and Development, USACE; 

 John H. Lockhart, Coastal Technical Monitor, USACE; William F. McCleese, REMR 

 Program Manager, WES, and D. D. Davidson, REMR Coastal Problem Area Leader, 

 WES. 



The study was conducted by personnel of CERC under the general direction 

 of Dr. James R. Houston, Chief, and Mr. Charles C. Calhoun, Jr., Assistant 

 Chief, CERC; and under direct supervision of Mr. C. E. Chatham, Chief, Wave 

 Dynamics Division and Mr. Davidson, Chief, Wave Research Branch. The study 

 was designed and planned by Mr. Dennis G. Markle , Research Hydraulic Engineer, 

 Wave Research Branch. Models were constructed and tests were carried out by 

 Messrs. Willie G. Dubose, Marshall P. Thomas, and C. Ray Herrington, Engineer- 

 ing Technicians, assisted by Messrs. Cornelius Lewis, Engineering Technician, 

 Raymond Reed, Contract Student, and Ernest Galloway, Student Aid, under the 

 supervision of Mr. Markle. This report was prepared by Mr. Markle. 



Commander and Director of WES during publication of this report was 

 COL Larry B. Fulton, EN. Technical Director was Dr. Robert W. Whalin. 



