Table 37 (Continued)
Construction and Rehabilitation History
1923
Construction of the southern end of the southerly extension (Fig-
ure 97, Section
was completed. It consisted of a stone-filled
built on a stone base.
concrete breakwater (Figure 99, Section
The crest el of the extension was
ft
and its width was
8.3 ft.
The exterior breakwater (Figure 97, Sections C, D, and E) was capped
1929
with a concrete superstructure. The crest el of the breakwater was
ft lwd. Riprap
average) was placed on the lakeside of
ft
on a
slope. Seven-ton riprap also was placed on the
harbor side in some areas (Figure 97, Sections C-4 and E.
)
Portions of the inner breakwater (Figure 97, Sections 0, P, R, and
1930
were capped with a concrete superstructure. The 150-ft-long portion
ft
of section
lwd, and the 300-ft-long portion of P had a crest el of
ft
lwd. The remaining portions (Sections R and
were constructed with
ft lwd.
crest els of
1934
sections of the inner breakwater (Figure 97, Sec-
The
tions K , L ,
and
were capped with concrete superstructures.
of structure (Section
included a
The longest length (3,488
ft
parapet with an el of
the breakwater (Section U) also included a parapet, but the crest el
ft lwd. This portion of the breakwater also included the
was
of steel sheetpiling on each side of the timber cribs
The northernmost
ft
end of the Xnner breakwater had a crest el of
Section K ) , and the remaining portions of the structure (Sections L
and M)
a
crest el.
of the shore arm extension (Figure 97, Section A ) was
The inner
1950
capped with a concrete superstructure. The superstructure included a
parapet with an el o f
ft
A 1,000-ft-long portion of the shore arm extension (Figure 97, Sec-
1955
The minimum size
tion B2) was; capped with a capstone superstructure.
and the crest el
of the
ft lwd. A portion of the inner breakwater
was repaired
was
average) was
placed on each
(Figure 97, Section R.
)
Riprap
R. The stone
)
and had side slopes of
extended above
Riprap (7-ton average) was installed on each side of the southern end
1958
of the inner breakwater (Figures 97 and 98, Section
The stone
and had
side slopes.
protruded
A 300-ft-long portion of the shore arm extension (Figure 97, Sec-
1960
tion
was capped with a concrete superstructure which included a
(Figure 99, Section
parapet installed at an el of
ft
(Continued)
(Sheet 2 of 3)
161
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