Construction and Rehabilitation History
1961
action causing increased consolidation. Repairs were made to bring
the structure back up to previous designs but with larger stone.
(Cont)
The design called for 10- to 14-ton granite stone and a crown width
of 1 ft for all repair sections (Figure 2 )
0
and
the crown ele-
section of the north jetty, between
vation was to be +11 ft mlw, and the side slopes were
The
ft mlw crown ele-
remainder of the jetty repairs were to have a
vation and
side slopes (with the exception of the north
The design was based on a
jetty ocean-side slope which was
14- to 15-ft wave height and Hudson's stability equation. Cost of
the rehabilitation with 5,500 tons of stone was ,600.
Rehabilitation of jetties was carried out on approximately the same
1969
section as the 1961 repairs (Figure 25). Except for the use of
stone, the design sections were identical to those of
12- to
to
was built up to
1961. The north jetty from sta
+11 ft mlw with
side slopes and from sta
to
was
ft
with
and
side slopes on the
built up to
ocean and channel sides, respectively. The south jetty from
to
was built up to
ft mlw with
side
sta
slopes. The crown width on all sections was 1 ft. Dislocation and
0
consolidation of cover stone overlying smaller stone (below rnlw) was
thought to be the cause of jetty deterioration. The low areas to be
repaired were wide which provided a good base to place new stone.
Wave heights of 14 and 15 ft and Hudson's stability equation were
used, similar to those in the 1961 design. A total of 21,500 tons
of stone was placed at a cost of 8,000. Inner areas of the
jetties were not rehabilitated although in need of some repairs.
1985
The jetties are presently in need of another rehabilitation to bring
them up to previous designs. The Navy maintains a 42-ft-deep chan-
nel between the jetties (Federal project depth is 38
to provide
deep-water access to its base at
(Sheet 4 of 4
)
48
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