2. The monochromatic wave conditions considered included two seawall 

 configurations at three different water levels. Because of the wide range in 

 water levels, the data were analyzed as six distinct subsets. The structure 

 configurations were a vertical wall and a riprap armored seawall with a slope 

 of 1 on 1.5. Both structures had 1 on 10 fronting slopes, and the water 

 depths tested were deep at the toes of the structures. 



3. In Saville's test report (Saville 1955), the local wave height near 

 the structure is not given. Therefore, the local wave height had to be calcu- 

 lated in order to develop coefficients as consistent as possible with those 

 determined from the irregular wave tests. Using the deepwater height and 

 period, the wave height and wave length in a depth of 13.5 ft was calculated 

 using linear wave theory. A depth of 13.5 ft represents a water depth within 

 the range used to develop the overtopping coefficients for the irregular wave 

 tests. The estimated wave height and wave length in 13.5 ft of water was used 

 to calculate the dimensionless freeboard F' (see Equation 1). The range of 

 wave heights was from 2.75 to 13.32 ft, and the range of wave periods was from 

 2.96 to 15.00 sec. The overtopping coefficients from Saville's tests are 

 given in Table B1. These monochromatic wave coefficients cannot be compared 

 directly to the coefficients given in Table 1 (in main text) for irregular 

 waves; however, they can be used to evaluate the relative effectiveness of the 

 six structure configurations/swl permutations. 



B3 



