The transmitted wave height at the peak of the storm has been 

 estimated by obtaining a value of C^ from Figure 10 for L/B 

 corresponding to Tp = 3.5 s; the resulting value of H^ is 0.66 m. 

 Visual estimates of the transmitted wave height at the peak of the storm 

 were 0.6 - 0.9 m. 



An estimate of the peak mooring load can be obtained by using 

 Equation 8 for H^. = 1.0; the resulting peak mooring load on a central 

 mooring line is 14240 N or 1330 N/m. 



Conclusions 



The Goodyear-design floating tire breakwater at La Salle Park 

 Marina has performed successfully from its installation in May 1981. It 

 survived extreme wave conditions estimated at H^. = 1.0 m and T = 

 3.5 s with no damage, during a storm on April 30, 1984. It appears that 

 an FTB of this type can be designed with confidence using the prototype 

 results in this report and field-proven construction guidelines reported 

 elsewhere (Bishop et al . 1983). 



An 129 m X 19 m section of FTB was monitored during parts of 

 1981 and 1982. Wave transmission characteristics were determined by 

 measuring incident and transmitted waves with underwater pressure 

 transducers. The wave transmission results (Figure 10) are in close 

 agreement with earlier results from model tests. 



Mooring load characteristics were determined by measuring the 

 loads exerted on several anchor lines using electronical and mechanical 



102 



