PREFACE 



This report provides information and specific guidance on the design of 

 stone riprap revetments exposed to wave attack, including several examples 

 to illustrate the concepts presented. It supplements Sections 7.21 and 7.37 

 of the Shore Protection Manual (SPM) . 



The report was prepared by John P. Ahrens, Oceanographer , under the 

 general supervision of Dr. R.M. Sorensen, Chief, Coastal Processes and 

 Structures Branch, Research Division. 



The author acknowledges the numerous contributions by various reviewers 

 to an early draft of this report, and especially the comprehensive and help- 

 ful review by D.D. Davidson, Chief, Wave Dynamics Branch, Hydraulics Labora- 

 tory, U.S. Army- Engineer Waterways Experiment Station (WES). 



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. 



TED E. BISHOP 



Colonel, Corps of Engineers 



Commander and Director 



