Table 20 (Concluded)
Construction and Rehabilitation History
The harbor was deepened to 35 ft.
Federal support of the sand
transfer plant ended.
1968
Rehabilitation of the 550-ft seaward section of the north jetty was
1969
made with 10- to 14-ton capstone on
slopes (Figure 3 )
A total of 2,000 tons of armor stone was placed at a cost of
,000. A design wave height of 15 ft and a 14-sec wave period
were used to select the capstone size.
Present plans call for repairs to 1,300 ft of the south jetty. The
1985
jetty would be made impervious to sand motion via injection of sili-
cate grout on the shoreward 800 ft and via a rubble filter on the
seaward 500 ft. For slope protection, 5- to 10-ton stone were
placed on 200 ft of the channel side (near shoreward end). The
design wave height of 12.7 ft (obtained using the method outlined in
Seelig and Ahrens (1980) used to compute size of cover stone to pro-
vide protection of the filter layer on the seaward end of repair).
Cover stone will be 8 to 14 tons with an underlayer of 800- to
2,400-lb stone and 3- to 6-in. filter stone. The estimated first
cost is .2 million.
(Sheet 3 of
62
Previous Page
