4 Tests and Results 



Tests 



Existing conditions 



Prior to testing of the various improvement plans, comprehensive tests were 

 conducted for existing conditions (Plate 1) to establish a base from which to 

 evaluate the effectiveness of the test plans. Wave-height data, sediment tracer 

 patterns, wave-induced current patterns and magnitudes, and wave pattern 

 photos were secured along Camp Ellis Beach for test waves from aU four test 

 directions. 



Improvement plans 



Initially, proposed improvement plans consisted of roughening a portion of 

 the existing Saco River north breakwater adjacent to Camp Ellis Beach, and 

 installing a beachfiU and offshore berms. After initiation of the study, tests 

 were added to evaluate spur jetties and removal of the existing north break- 

 water. Wave heights, sediment tracer patterns, wave-induced current patterns 

 and magnitudes, and/or wave patterns were secured for nine proposed improve- 

 ment plans. Brief descriptions of the test plans are presented in the following 

 subparagraphs; dimensional details are shown in Plates 2-8. Typical cross 

 sections for various elements of Plans 1-8 are presented in Plate 9. 



a. Plan 1 (Plate 2) consisted of roughening a 259-m-long (850-ft-long) 

 portion of the north breakwater adjacent to Camp Ellis Beach. The 

 structure was roughened by placement of 907- to 1,814-kg (1-to 2-ton) 

 stone along the seaward side of the breakwater on a 1V:2H side slope. 

 The crest of the new stone structure was 2.4 m (8 ft) in width with an 

 el of +5.2 m (+17 ft). 



b. Plan 2 (Plate 3) entailed the placement of a beach fill adjacent to Camp 

 Ellis Beach in concert with the existing north breakwater. The beach 

 fill el was +4.6 m (+15 ft) with a 1V:15H slope extending seaward. 



Chapter 4 Tests and Results 



21 



