PREFACE 



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

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

 ter (CERC) by the Office, Chief of Engineers (OCE) under the Repair, Evalua- 

 tion, Maintenance, and Rehabilitation (REMR) Research Program Work Unit 32325, 

 "Use of Dissimilar Armor for Repair and Rehabilitation of Rubble-Mound Coastal 

 Structures." 



Tests of dolos overlays for existing tribar armor, which fulfill one 

 milestone of this work unit, were conducted under the general direction of 

 Mr, James E. Crews and Tony C. Liu, REMR Overviev; Committee, OCE; Mr. Jesse A. 

 Pfeiffer, Jr., Directorate of Research and Development, OCE; members of the 

 REMR Field Review Group; Mr. John H. Lockhart , Jr., Coastal Technical Monitor, 

 OCE; Mr. William F. McCleese, REMR Program Manager, WES; and Mr. D. D. 

 Davidson, REMR Coastal Program Area Leader, CERC. 



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

 of Dr. James R. Houston, Chief, CERC, and Mr. Charles C. Calhoun, Jr., Assis- 

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

 Wave Dynamics Division, and Mr. D. D. Davidson, Chief, Wave Research Branch. 

 Tests were planned by Mr. Robert D. Carver, Principal Investigator, and 

 Ms. Brenda J. Wright, Civil Engineering Technician. The model was operated by 

 Ms. Wright, under the supervision of Mr. Carver. This report was prepared by 

 Mr. Carver and Ms. Wright and edited by Ms. Shirley A. J. Hanshaw, Information 

 Products Division, Information Technology Laboratory, WES. 



Director of WES during report publication was COL Trwayne G. Lee, CE. 

 Technical Director was Dr. Robert W. Whalin. 



