Table 3 (Continued) 



Date(s) Construction and Rehabilitation History 



1969 The damaged west breakwater trunk was repaired by placement of two 

 layers of 19-ton reinforced tribars (260 units) on the sea-side 

 slope, shoreward of the tetrapod area (Figure 5). A concrete rib 

 cap was added to the crest for buttressing of the tribars. The 

 total cost was $443,000. 



In November 1 969 another severe storm hit with estimated breaking 

 wave heights of 15-20 ft; damage occurred to the west breakwater 

 in the tribar-original armor stone transition area, presumably 

 because of insufficient interlocking. Approximately 25 19-ton 

 tribars were moved shoreward as much as 300 ft. 



1973 The November 1969 damage was repaired by placement of 80 19- ton 

 reinforced tribars (Figures 5 and 10). The tribars and concrete 

 crest ribs were extended shoreward another 80 ft down the seaside 

 of the west breakwater trunk, and the landward end of the tribar 

 armor section was buttressed by 25 35-ton tribar units. The total 

 cost was $262,000. 



1977 A 1973 breakwater inspection indicated considerable damage and 

 settlement of the 33-ton tetrapods on the seaward quadrants of 

 both breakwater heads. In addition, the 8- ton armor stone along 

 both trunks was failing and required repair. In 1977 the 

 following repairs were completed (Figure 5): on the west break- 

 water, 257 30-ton reinforced dolosse were placed in two layers 

 over the 33-ton tetrapods on the sea-side quadrant of the head; 

 291 20-ton reinforced dolosse were placed on the sea-side slope of 

 the west breakwater trunk; on the east breakwater 610 30-ton rein- 

 forced dolosse were placed in two layers over the 33-ton tetrapods 

 on the sea-side quadrant of the head; 164 20-ton reinforced 

 dolosse were placed in a double layer on the sea-side slope of the 

 trunk beginning at the shoreward end of the 35-ton tribars; and, 

 beginning at the point where the 20-ton dolos ended and extending 

 shoreward, two layers of 6-ton unreinforced dolosse (455 units) 

 were placed on the sea-side slope of the east breakwater trunk. 

 The total cost was $3,290,000. 



1984 The most recent rehabilitation work was completed in an effort to 

 eliminate the need for future "piecemeal" repairs to the break- 

 waters. On the west breakwater, one layer of 6.5-ton tribars was 

 placed on the harbor-side slope from sta 19+35 to sta 22+00 (head 

 at sta 23+15). Between sta 17+75 and sta 19+35, single layers of 

 6.5-ton and 11-ton tribars were placed on the harbor-side and sea- 

 side slopes, respectively. Also in this section the concrete rib 

 cap was constructed, and at sta 17+75 the 11-ton seaside tribars 



(Continued) 



(Sheet 4 of 5) 



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