Table 39
Indiana Harbor Breakwaters
Indiana Harbor, Indiana
Construction and Rehabilitation History
Date ( s )
Construction of a 1,120-ft-long north breakwater (Figure 102, Sec-
1922
tion A)
completed. The breakwater was built of rubble-mound con-
struction. It had a crest el of
and side slopes of
ft
Section A ) . Armor stone sizes along the crest were
7 tons (minimum), and armor stone along the slope (beneath the water
surface) ranged from 1 to 7 tons with an average weight of 3 tons.
Construction of a 201-ft-long east breakwater (Figure 102, Section B)
1926
was completed. The breakwater was a stone-filled concrete structure
Section B) built on a stone base. It had a crest el of
ft lwd and a width of 8 . 3 ft.
lakeward rubble-mound extension of the each break-
1935
A
It had a crest el of
water was completed (Figure 103, Section C.
)
ft lwd, a crest width of 10 ft, and
slide slopes.
Armor stones along the crest ranged from 7 to 20 tons, and armor
along the slope (beneath the water surface) ranged from 2 to 7 tons
(Figure 103, Section C.
)
1951-
A series
model tests was conducted (Hudson and Housley 1959) to
determine the extent of reflected waves in the navigation channel and
1957
remedial measures required to alleviate the problems.
Maintenance costs have been low throughout the lifetime of the break-
1986
waters, and the structures are presently in good condition.
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