Reprint or republication of any of this material shall give appropriate 

 credit to the U.S. Army Coastal Engineering Research Center. 



Limited free distribution within the United States of single copies of 

 this publication has been made by this Center. Additional copies are 

 available from: 



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 A TTN: Operations Division 

 5285 Port Royal Road 

 Springfield, Virginia 22151 



The findings in this report are not to be construed as an official 

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