is placed in the model (Figure C3) , and (c) beachfill tests (where a beachf ill 

 is simulated) . After the base tests were completed for a large number of 

 water levels, wave angles, and wave heights, the number of test conditions was 

 reduced by grouping tests which produced similar results. 



t\ 



nr i\v 



a. Pretest 



b. Posttest 



Figure C3. Sediment tracer placement in model; 

 Presque Isle 



5. Figure C4 is the model with an example plan installed. Figure C5 

 summarizes velocities for a specific test condition for the base condition and 

 three breakwater plans. Figure C6 illustrates the shoreline response and the 

 currents for a beachfill test of one of the plans. Testing indicated that a 

 107-m spacing between 46-m-long segments produced satisfactory results within 

 the reach covering the groin field. It was best to place the breakwaters so 



C4 



