Maximum wave heights along Camp Ellis Beach for the +3.7- and +4.1-m 

 (+12.0- and +13.6-ft) swl's were 2.5 and 3.2 m (8.1 and 10.5 ft), respectively, 

 for test waves from 88 deg. From visual observations, it appeared that the 

 roughened breakwater section of Plan 1 reduced the reflected wave energy in 

 the vicinity of the beach. 



Wave-induced current patterns and magnitudes for Plan 1 are shown in 

 Photos 35-53 for representative test waves from all four directions and swl's. 

 For all test conditions, currents along Camp Ellis Beach moved in a northerly 

 direction. Maximum velocities obtained along the beach were 0.61, 0.94, 0.61, 

 and 0.03 m/s (2.0, 3.1, 2.0, and 0.1 fps) for the 101 -, 88-, 75-, and 56-deg 

 directions, respectively. Typical wave patterns obtained for Plan 1 also are 

 shown in Photos 35-53. 



The general movement of tracer material at Camp EUis Beach with Plan 1 

 installed is shown in Photos 54-68 for representative test waves from the var- 

 ious directions. For test waves from 101, 88, and 75 deg with the +2.7-m 

 (+8.8-ft) swl, sediment tracer material migrated in a northerly direction with 

 the more severe test wave conditions resulting in erosion at a faster rate. 

 Severe storm waves with the +3.7- and +4.1-m (+12.0- and +13.6-ft) swl's 

 resulted in significant runup with sediment material washing up on the over- 

 bank, similar to results obtained for existing conditions. For the 0.0-m (0.0-ft) 

 swl, tracer material did not move out of the immediate area. For test waves 

 from 56 deg, sediment remained in the immediate vicinity of Camp Ellis 

 Beach with the +2.7-m (+8.8-ft) swl. 



General movement of tracer material in the vicinity of Camp Ellis Beach 

 for the Plan 2 beachfill is shown in Photo 69 for 13-sec, 3.7-m (12-ft) test 

 waves from 101 deg with the +2.7-m (+8.8-ft) swl. The beach fill eventually 

 eroded to the original shoreline with sediment moving in a northerly direction. 

 Sediment tracer material movement with the roughened breakwater and beach- 

 fill of Plan 3 is shown in Photo 70 for the same test conditions. Again, the 

 beachfiU moved north and eroded to the shoreline. The roughened breakwater 

 had little effect on the rate of sediment movement to the north. 



The 152,920-cu-m (200,0(X)-cu-yd) submerged Plan 4 berm is shown in 

 Photo 71 prior to testing. All tests were conducted for the +2.7-m (+8.8-ft) 

 swl, and the berm was subjected to representative test waves from 101, 88, 75, 

 and then again for 101 deg for a cumulative time of 15 hr. The general 

 movement of the berm after 2.5 and 5 hr of testing with 13-sec, 3.7-m (12-ft) 

 waves from 101 deg is shown in Photos 72 and 73, respectively. Progression 

 of berm migration after additional testing with 13-sec, 5.5-m (18-ft) test waves 

 from 88 deg for 3 hr and 1 1-sec, 4.3-m (14-ft) test waves from 75 deg for 3 hr 

 is shown in Photos 74 and 75, respectively. An additional 4 hr testing with 

 13-sec, 3.7-m (12-ft) waves from 101 deg resulted in the migration pattern 

 shown in Photo 76. The berm material moved toward Camp Ellis Beach for 

 all the test waves. Tracer material also was placed along the shoreline prior to 

 testing of the submerged berm. General movement of tracer material along 

 Camp Ellis Beach for 13-sec, 3.7-m (12-ft) test waves from 101 deg during the 



Chapter 4 Tests and Results 



25 



