Preface 



The model investigation of the Vale de Cavaleiros breakwater reported herein 

 was requested by Joint Venture Rhein Ruhr Ingenieur-Gesellschaft mbH (RRI) 

 and BCEOM Societe Franchise d'Ingenierie (JV RRI-BCEOM) and was con- 

 ducted at the Coastal Engineering Research Center (CERC) of the U. S. Army 

 Engineer Waterways Experiment Station (WES). In October 1996, CERC 

 merged with the WES Hydraulics Laboratory to become the Coastal and 

 Hydraulics Laboratory. Authorization for WES to perform the study was 

 granted by Cooperative Research and Development Act (CRDA) No. WES-96- 

 CERC-01 dated 11 January 1996. 



The study was conducted at WES during the period January 1996 through 

 May 1996 by personnel of the Coastal Structures Branch (CSB) of the 

 Navigation and Harbors Division (NHD), CHL, under the direction of Dr. James 

 R. Houston and Mr. Charles C. Calhoun, Jr., Director and Assistant Director of 

 CHL, respectively; and the direct guidance of Messrs. C. E. Chatham, Jr., Chief 

 of NHD; and Mr. D. D. Davidson, Chief of CSB. The physical model was 

 designed by Messrs. Ernest R. Smith and Jeffrey A. Melby, Research Hydraulic 

 Engineers, CSB. Experiments were conducted by Messrs. Smith, Willie G. 

 Dubose, Civil Engineering Technician; John H. Williams, Civil Engineering 

 Technician; Johnny Heggins, Civil Engineering Technician; and David Daily, 

 Instrumentation Services Technician, NHD. This report was prepared by 

 Messrs. Smith and Melby. 



Liaison was maintained with JV RRI-BCEOM through progress reports and 

 telephone conversations during the course of the investigation. Prior to con- 

 struction of the breakwater cross section, Mr. A. Merrien, France, visited 

 WES during 20 to 22 March 1996 to discuss proposed test conditions. 

 Messrs. Merrien and L. Fischer, Germany, visited WES on 17 and 18 April 1996 

 to observe experiments and discuss alternative breakwater plans. 



At the time of publication of this report, Director of WES was Dr. Robert W. 

 Whalin. Commander of WES was COL Robin R. Cababa, EN. 



The contents of this report are not to be used for advertising, publication, or 

 promotional purposes. Citation of trade names does not constitute an 

 official endorsement or approval of the use of such commercial products. 



