PREFACE 



This memorandum describes a method for determining the crest height 

 of vertical-faced breakwaters considering allowable wave regeneration by 

 overtopping. It is based on laboratory work and data analysis reported 

 by Goda, Takeda, and Moriya (1967) and Goda (1969). The work was carried 

 out under the coastal structures program of the U.S. Army Coastal Engi- 

 neering Research Center (CERC) . 



The technical guidelines presented in this memorandum are intended to 

 augment the procedures described in the "Shore Protection Manual" (SPM) , 

 Section 7.23, "Wave Transmission" (U.S. Army, Corps of Engineers, Coastal 

 Engineering Research Center, 1975); the discussion in the SPM is limited 

 to thin and wide submerged impermeable breakwaters and broad-crested, 

 permeable rubble-mound breakwaters. 



The memorandum was prepared by William N. Seelig, Research Hydraulic 

 Engineer, Coastal Structures Branch, under the general supervision of 

 Dr. R.M. Sorensen, Chief, Coastal Structures Branch. 



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. 



JAMES L. TRAYEF 



Colonel, Corps "of Engineers 



Commander and Director 



