Construction and Rehabilitation History
phase of planned
required due to the existing founda-
1984-
tion conditions (soft clays) and potential for failure if it were
1985
(cont.) built in one phase. For the same reason the structures were not
overbuilt. Total settlement of the south jetty is expected to be
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
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
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,340,000 with 27,500 and
45,000 tons of stone to be placed on the north and south jetties,
respectively.
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