Table 46
Swinomish Channel
Washington
Construction and Rehabilitation History
1892
The project was adopted.
The north jetty was constructed. The jetty was extended west from
1893
in the Wall" to Saratoga Passage. The jetty was of rubble-
mound and timber pile construction over brush mattresses with crest
ft mllw, crest width of ft, and side slopes of
elevation of
The timber piles were placed in a row along both sides of the
crest with 6-ft center-to-center spacing.
1goo
The north jetty was reconstructed,
10
98
The south jetty, extending west from Goat Island into Saratoga Pass-
age, was constructed of pile and rock. The jetty extended 3,650 ft
ft mllw. A 300-ft gap for
to deep water with a crest elevation of
fish and boat passage was left between Goat Island and the jetty.
Island jetty was constructed of rubble mound over a
1938
The
layer of brush mattresses. The crest elevation was
ft mllw with a 3-ft crest width and
side slopes.
1941
The Goat-McGlinn Island jetty was reconstructed to a
ft mllw
crest elevation with 5-ft crest width and
side slopes using
yd of stone. It was then repaired in September with
33,185
cu yd of stone and in October with 210 cu yd of stone.
The Goat-McGlinn jetty was rehabilitated with side slopes changed
using 38,812 tons of rock.
1946
from
to
1962
in the
were removed.
Navigation hazards at
The Goat-McGlinn jetty was repaired using 16,408 tons of rock,
1963
Major rehabilitation and extension of south jetty were effected. The
1973
jetty had originally extended to deep water, but sediment deposits
had enlarged the shallow shelf, and the jetty head was 1,000 ft from
deep water at this time. The crest elevation of the jetty was
to
which was below mllw. The
ft mllw, except for the outer 800
jetty was reconstructed of quarry
and rock, 4,100 ft long, with
ft mllw, crest width of 8.5 ft, and side slopes
crest elevation of
Treated timber piles were placed on 200-ft centers on the
of
Skagit Bay side to mark the structure, which would be submerged at
wide, were left for fish passage,
high tide. Two gaps, each 50
gap for fish and boat passage. A
along with the existing
3-pile dolphin was placed at each end of the jetty. Construction
required 54,310 tons of rock.
(Continued)
10
7
Previous Page
