Date(s) 
1968 
(cont. ) 
1977 
1984 
1986 
Table 4 (Continued) 
Construction and Rehabilitation History 
slope. The remaining repairs consisted of buttressing the cap with 
12-ft-wide bedding and cover stone layers. A 3-ft-wide layer of toe 
protection was placed along the outer edge of the repair sections. 
Stone sizes were 6 to 8 tons for the cover layer, 200 to 1,000 lb for 
the core (placed on seaside of outer section only) and toe protec- 
tion, and 0.5 in. to 200 lb for the approximately 3-ft-thick bedding 
layer. Cost totaled $65,300 using 4,410 tons of stone. 
Minor repairs were made at a total cost of $9,200. (No details are 
available.) 
Two sections of the south jetty were repaired (Figure 5), and a 295- 
ft-long rubble-mound spur was placed at sta 8+40 on the north jetty's 
landward side. The south jetty repairs, from sta 14+40 to sta 15+85 
and sta 19+20 to sta 20+20, consisted of a +7 ft mlt crown elevation, 
a composite width (including the cap width) of 20 ft and 1V:3H side 
slopes. A bedding layer of 0.5-in. to 200-lb stone was placed to 
+1.5 ft mlt and extended 26.5 ft from the jetty center line. Stone 
sizes were 6 to 8 tons for the cover layer and 200 to 1,000 lb for 
the core and toe protection. The toe protection was placed on a 
1V:3H slope along the outer edge of the cover and bedding layers. 
The spur projected landward from the north jetty at a 30-deg angle 
and was built to an elevation of +6 ft mlt, a 5-ft top width, and 
1V:1.5H side slopes. One-half inch to 200-lb blanket stone were 
used, except for a 90-ft section adjacent to the jetty. Single 4- to 
6-ton stones were placed along the crown. The purpose of the spur 
was to minimize sand movement over the lower (+4 ft mlt) landward 
jetty section that was building a channel side shoal with the 
potential for future channel encroachment which would require subse- 
quent maintenance dredging. 
Except for the more recent repair sections, the jetties are in poor 
condition, with many voids under the concrete caps and numerous 
cracks in the caps themselves. Jetty rehabilitation has been delayed 
pending authorized project improvements which include relocating the 
north jetty and channel deepening. 
25 
