5 Conclusions 



Based on results of the coastal hydraulic model investigation reported herein, it 

 is concluded that: 



a. During periods of storm wave activity and high tide conditions (+2.7 m 

 (+8.8 ft)) at Camp Ellis Beach, wave heights ranging from 2.4 to 2.7 m 

 (8 to 9 ft) will occur adjacent to the beach for existing conditions. For 

 extreme storm events with tides in excess of +4.1 m (+13 ft), wave 

 heights adjacent to the beach will reach approximately 3.4 m (11 ft). 

 Little wave energy appears to reach the area, however, for low tide 

 conditions (0.0 m (0.0 ft)). 



b. Sediment tracer tests for existing conditions indicated that erosion 

 would occur along Camp Ellis Beach for the higher tide levels with net 

 movement of sediment in a general northeriy direction. Larger wave 

 conditions would result in an increased rate of erosion. For the lower 

 tide levels, however, test waves would not move sediment out of the 

 immediate vicinity of Camp Ellis Beach. 



c. The roughened breakwater plan (Plan 1) would not significantly reduce 

 wave heights, alter current patterns and magnitudes, or prevent erosion 

 in the vicinity of Camp Ellis Beach. Test results were very similar to 

 those obtained for existing conditions. 



d. For the beachfill plans with the existing (Plan 2) and roughened 



(Plan 3) breakwaters, sediment would move north, and beachfills would 

 eventually erode to the existing shoreline. Beachfill plans would only 

 be temporary solutions to the erosion problems at Camp EUis Beach 

 (i.e., requiring periodic renourishment). 



e. The 152,920-cu-m (200,000-cu-yd) Plan 4 submerged berm configura- 

 tion initially would result in reduced wave energy reaching the beach 

 and a slightly reduced rate of erosion along Camp Ellis Beach. The 

 76,460-cu-m (l(X),(XX)-cu-yd) Plan 5 submerged berm configuration 

 provided minimal wave protection and would initially result in erosion 

 along the beach similar to existing conditions. Sediment from both 

 berm configurations would migrate toward, and feed, the beach. After 

 continued exposure to wave action, the berms would erode to a point 



Chapter 5 Conclusions 



35 



