j. Plan 10 (Plate 5) entailed the elements of Plan 9 with a 56.4-m (185-ft) 

 rubble causeway extension to the south. The distance between the toes of 

 the breakwater and the causeway extension was 119 m (390 ft). 



k. Plan 11 (Plate 5) involved the elements of Plan 10 with an additional 

 15.2-m (50-ft) causeway extension, resulting in a 71.6-m-long (235-ft- 

 long) structure. The distance between the toes of the breakwater and 

 causeway extension was 115.8 m (380 ft). 



I. Plan 12 (Plate 5) consisted of the elements of Plan 9, but the breakwater 

 was decreased by 61 m (200 ft) in length and its head was reoriented to 

 the west. This resulted in an 866-m-long (2,840-ft-long) structure with a 

 137-m (450-ft) width between the toe of the breakwater and the outer 

 causeway dock face. 



m. Plan 13 (Plate 6) included the elements of Plan 9, but a 9.1-m-wide (30- 

 ft-wide) breach was installed in the breakwater approximately 167.6 m 

 (550 ft) seaward of the shoreline. 



n. Plan 14 (Plate 6) involved the elements of Plan 13 with a 71 .6-m-long 

 (235-ft-long) causeway extension. The navigation opening was 115.8 m 

 (380 ft) in width between the toes of the breakwater and the causeway 

 ' extension. 



o. Plan 15 (Plate 6) entailed the elements of Plan 14 but the causeway 



extension was reduced in length by 15.2 m (50 ft) resulting in a 56.4-m- 

 long (185-ft-long) structure with a 119-m (390-ft) navigation opening 

 measured between the toes of the breakwater and the causeway extension. 



p. Plan 16 (Plate 7) consisted of the elements of Plan 14 but an area 



southwest of the head of the causeway was raised with gravel to represent 

 shoaling that may be expected over the next 10 years. These contours 

 were raised 0.9 m (3 ft) in elevation. 



q. Plan 17 (Plate 8) entailed the dredging elements of Plan 4 with no 



breakwater in place. The entrance to the existing harbor, however, was 

 closed. 



r. Plan 18 (Plate 9) involved the elements of Plan 17 but the stone revetment 

 along the existing breach in the causeway was removed to slighdy 

 increase its width and the depths were increased from about 1.1 to 2.4 m 

 (3.5 to 8 ft). The plan also included the installation of a dredged 

 deposition basin eastward of the breach. The basin paralleled the 

 shoreline and causeway and extended southeasterly in an arc about 122 m 

 (400 ft) in diameter. It was 6.7 m (22 ft) deep. 



20 Chapter 4 Experiments and Results 



