Table 14 (Continued) - TechReport20051

Figure 25. Typical 1961 repairs to Jackson ville jetties

Table 14 (Concluded) - TechReport20052

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Table 14 (Continued)

Date

Construction and Rehabilitation History

1931-

49,500 and 51,200 tons of stone were placed on the north and south

jetties, respectively. The cost of the seaward repairs totaled

1932

(Cont)

6,000.

1934

Voids on the ocean side of the north jetty were filled with 25- to

100-lb of granite stone to arrest the flow of sand through the

structure, and 4,800 tons of stone were placed between sta

and

at a cost of ,300 (Figure 24). A monolithic concrete cap

ranging in width from 2 to 8 ft was constructed along the centerline

and

The crown elevation

of the north jetty between sta

ranged between +11 and +13 ft mlw. A total of 3,780 cu yd of con-

crete was placed on the structure at a cost of ,000 (Figure 24).

Elevations on the north jetty varied form

to +14 ft mlw and on

1935

the south jetty varied from 0 to +14 ft mlw. Repairs were made to

the inner portion of the south jetty, filling void spaces from

using 200 to 2,000-lb stone. From sta

sta

the voids were filled between 0.0 and 4.0 ft mlw with smaller

stone (less than 200 l )

b . This section was repaired using a 4-ft-

crown width at an elevation of

ft mlw and

side slopes

(Figure 2 4 ) .

The north jetty concrete cap was widened from the existing 2-ft

1938

(Figure 24).

tion to a width of 6 ft between

and

1940-

Repairs were made to the south jetty between sta

and

(Figure 24). Granite stone of 1 to 3 tons and 3 to 6 tons was

1941

placed on the inner 1,200 ft and outer 1,800 ft, respectively. Void

filling stone of 50 to 150

was placed throughout the repair sec-

tion. The design called for a 6-ft crown width at

ft mlw with

side slopes. Sand overlying the jetty was to be removed

and

before stone placement. Small stone was removed between

as required to allow placing of the cover stone to the design

section with the removed stone subsequently used to fill voids.

21,800 tons of 1- to 6-ton stone and 4,800 tons of 50- to

stone were placed at a cost 5,000.

Rehabilitation made to the seaward end of the south jetty between

1961

and

and the north jetty between

and

sta

(Figure 2 4 ) . Areas of deterioration from settlement and dis-

lodgement of stone had occurred at the ocean ends and along landward

portions of both jetties. Also, several portions of the north jetty

concrete cap had been broken and displaced from the crown along with

some of the underlying support stone. The major causes of settle-

ment seemed to be slope flattening and the possibility of wave

(Continued)

(Sheet 3 of 4)

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