PREFACE 



This report is published to provide coastal engineers with a basic 

 analytical procedure in the evaluation of certain floating breakwater 

 types as structures for protecting particular sites against wind waves. 

 The work was carried out under the coastal construction program of the 

 U.S. Army Coastal Engineering Research Center (CERC) , 



This report was prepared by Dr. Bruce H. Adee, Assistant Professor 

 of Mechanical Engineering, Mr. Derald R, Christensen, Research Engineer, 

 and Dr. Eugene P. Richey, Professor of Civil Engineering, of the Ocean 

 Engineering Research Laboratory, University of Washington, Seattle, 

 Washington, under CERC Contract No. DACW72-74-C-0012. 



Special appreciation is extended to the port of Friday Harbor, 

 Washington, for the lise of the floating breakwater for the field assess- 

 ment part of the study. Mr. Robert Hovey, Port Engineer, and Mr. Jack 

 Fairweather, Port Superintendent, provided generous assistance with the 

 numerous logistics problems in the installation and maintenance of the 

 measuring equipment. The sensor monitoring and recording package was 

 adapted from a design developed in a contemporary project sponsored by 

 the University of Washington Sea Grant Program for monitoring two other 

 floating breakwaters of a different type. Data from these two sites 

 were used for comparative purposes in the analyses of the Friday Harbor 

 breakwater. 



Dr. D. Lee Harris, Chief, Oceanography Branch, was the CERC contract 

 monitor for the report under the general supervision of Mr. R.P. Savage, 

 Chief, Research Division. 



Comments on this publication are invited. 



Approved for publication in accordance with Public Law 166, 79th 

 Congress, approved 31 July 1945, as supplemented by Public Law 172, 88th 

 Congress, approved 7 November 1963. 



JOHN H. COUSINS 

 Colonel, Corps of Engineers 

 Commander and Director 



