PREFACE 



Authority to carry out this investigation was granted the US Army Engi- 

 neer Waterways Experiment Station's (WES) Coastal Engineering Research 

 Center (CERC) by the Headquarters, US Army Corps of Engineers (HQUSACE) , under 

 the Repair, Evaluation, Maintenance, and Rehabilitation (REMR) Research Pro- 

 gram Work Unit No. 32325, "Use of Dissimilar Armor for Repair and Rehabilita- 

 tion of Rubble-Mound Coastal Structures." 



Tests of dolos and tribar overlays for existing armor stone, which ful- 

 fill one milestone of this work unit, were conducted under the general direc- 

 tion of Mr. James E. Crews, and Dr. Tony C. Liu, REMR Overview Committee, 

 HQUSACE; Messrs. Jesse A. Pfeiffer, Jr., Directorate of Research and Develop- 

 ment, HQUSACE; John W. Lockhart , Coastal Technical Monitor, HQUSACE; and 

 William F. McCleese, REMR Program Manager, WES, and D. D. Davidson, REMR 

 Coastal Problem Area Leader. 



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

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

 Chief, CERC, Mr. C. E. Chatham, Chief, Wave Dynamics Division, and 

 Mr. Davidson, former Chief, Wave Research Branch. Tests were planned by 

 Mr. R. D. Carver, Principal Investigator, and Ms. B. J. Wright, Civil Engi- 

 neering Technician, both of the Wave Research Branch, CERC. The model was op- 

 erated by Ms. Wright, assisted by Mr. Frank James, Engineering Technician, and 

 Mr. Greg Gastrell, Engineering Aid, under the supervision of Mr. Carver. This 

 report was prepared by Mr. Carver and Ms. Wright. 



Commander and Director of WES at the time of publication of this report 

 was COL Dwayne G. Lee, CE. Technical Director was Dr. Robert W. Whalin. 



