Table 5 (Concluded) 



Date(s) Construction and Rehabilitation History 



1984- phase of planned construction, required due to the existing founda- 

 1985 tion conditions (soft clays) and potential for failure if it were 

 (cont.) built in one phase. For the same reason the structures were not 

 overbuilt. Total settlement of the south Jetty is expected to be 

 4 ft. Future maintenance work such as additional stone placement 

 will be required to maintain the jetties' design elevations. Prior 

 to repairs, center-line elevations (1983 survey) were typically +1 to 

 -2 ft NGVD on the south jetty and 0- to -1 ft NGVD on the north 

 jetty. Use of plastic plastic filter fabric appears to have had 

 little, if any, effect on the rate of jetty settlement. The 

 estimated cost of the repairs was $1,340,000 with 27,500 and 

 45,000 tons of stone to be placed on the north and south jetties, 

 respectively. 



39 



