PREFACE 



This report is published to assist coastal engineers in the planning, 

 design, and construction of nylon sandbag structures. The work was car- 

 ried out under the structure- sediment hydraulic interaction program of 

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



The report was prepared by Robert Ray, under the supervision of 

 R. Jachowski, Chief, Coastal Design Criteria Branch, Engineering Develop- 

 ment Division. The laboratory tests were conducted by R. Jachowski, 

 project engineer, and G. Simmons, Chief, Operations Branch, Research 

 Support 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. 



WILSON P. ANDREWS 



LTC, Corps of Engineers 



Acting Commander and Director 



