Table 8
Bayou LaFourche Jetties
Bayou LaFourche, Louisiana
Construction and Rehabilitation History
Two steel sheet-pile jetties were constructed at Belle Pass (Fig-
The jetties were 690 and 570
long on the east and west sides, re-
spectively, and extended out to about the -6 ft mlg contour. The
seaward 350-ft sections of the jetties were parallel and spaced
190 ft apart, and landward ends flared out at
deg angles. The
tops of the sheet piles were driven to 0 ft mlg and bracketed by a
double row of creosoted timber piles placed to a top elevation of
ft mlg. A 3-ft-thick layer of riprap was placed at the seaward
end of each jetty, extending a distance o ' 50 ft.
f
Storm action in 1940 badly damaged the jetties, and they subsequently
1941
were reinforced at their bases with rubble stone. In 1941 the land-
ward ends of the jetties were repaired and extended using 2,090 tons
of stone.
During this period additional stone was placed on the jetties, land-
1954
ward extensions were made, and a rubble-mound groin was constructed
about 250
flanked during a 1947 hurricane, necessitating repairs and landward
extensions in 1948. A rubble-mound section was placed along portions
of the sheet-pile jetty. In 1952 further maintenance work was done
on the rubble-mound sections which were brought up to grade.
Additional work was done in 1953, including landward extension of the
jetties (making the total length of each about 1,000 ft) and con-
struction of a 120-ft-long east groin. In 1954 the groin was ex-
tended seaward 1 0 ft, and additional work was done to bring the re-
2
mainder of the jetties up to grade. By this time, stone placed on
ft mlg
the seaward sides of the jetties had been brought up to
with a
side slope (same elevation and side slopes used on
landward extensions). The landward jetty extensions and groin were
required due to the continued recession of the shoreline, averaging
The steel sheetpiling was still in place but was no
about 15
longer considered effective, Cover stone sizes ranged up to a
maximum of 6 tons.
section)
About 570 ft of the seaward end of the west jetty (the
1958
was moved 115
westward because the original width was inadequate
for increased use of the waterway (Figure 1 ) This work was carried
9.
out by the State of Louisiana Department of Public Works.
1960
The jetties and groin were repaired with additional 500-lb to 4-ton
stone. Prior to repair, center-line elevations (January survey) were
from - 3 to
ft mlg on the west jetty, from
to
ft r l on
ng
(Continued)
45
Previous Page
