the same reduction in wave height is observed whether the offshore tripper 
is of rubble-mound construction or of vertical-face, sheet-pile construction. 
Figure 4 shows the wave height which would be incident at the shore 
(measured at the loeation of the MSL contour) for various incident wave 
conditions. For example, for a 10-foot wave incident to the general area, 
the offshore wave tripper would reduce the wave incident on the shore 
structure from about 11 feet to between 7.3 and 7.9 feet, depending on 
the characteristics of the tripper itseif. Again it may be noted that 
very little difference was observed between the rubble and sheet-pile 
structures, 
Some additional data were obtained from the testing program relative 
to reflection conditions existing seaward of the proposed offshore struc- 
ture with that structure in place. These data, summarized in Figure 5, 
showed no measurable effect on wave heights seaward of the proposed 
structure, 
+205 
Design surge level 
+6 Breakwater height tested 
LEGEND 
+ 2’ Breakwater height tested 
------ Actual Bottom Profile 
Model Bottom Profile 
| Wave Gage Location 
800 1000 1200. 1400 1600 1800 2000 
Feet 
FIGURE |. GENERAL TESTING ARRANGEMENT 
57 
