JMC method 



51. As mentioned in Part II, the JMC method of breakwater design has 

 limitations for use with typical US projects: beach fill is not included as a 

 part of the design method; guidance is based on data from sites at which 

 tombolo formation occurred for the majority of cases; wave conditions required 

 for design are the wave height and period corresponding to the "average of the 

 largest five nonstorm waves occurring in a typical year" ; and the effects of 

 structural transmissibility and water-level variations are not parameters in 

 the method. A comparison of the JMC and typical US design using data from the 

 Lakeview Park, Lorain, OH, detached breakwater project was presented by Rosati 

 and Truitt (1990). Figure 16 presents project parameters resulting from the 

 JMC method, which can be compared with the as-constructed parameters resulting 









Ls^.,n □ LS, 



CB 

 CP 



LEGEND 



Central Beach 

 Castlewood Park 











LS 

 LV 



Lakeshore Park 

 Lakeview Park 











RS 



Redington Shores 



- 







PERFECT AGREEMENT ^^^^^ 





^^^^"^^^^ '"''•^•^ 



- 







^^^^ DRS 







cp,n 

 1 



1 



1 



DCB, 



1 1 1 



1 



1 1 



0.4 0.8 1.2 1.6 2 2.4 



Depth at Structure, m 



3.2 



Figure 15. Evaluation of Hallermeier 's (1986) relationship 

 for structure design depth 



34 



