Table 55
Frankfort Harbor Structures
Frankfort, Michigan
Date( s )
Construction and Rehabilitation History
1868-
Construction of the south pier (Figure 153, Sections
N, and 0)
1873
was completed during this time frame. The lakeward end of the pier
was constructed with 20-ft-wide stone-filled timber cribs (Fig-
)
composed of woodpilings spaced about 2 1 ft apart and filled with
stone and sand.
Construction of the shoreward 603-ft length of the north pier
1870-
1879
(Figure 153, Sections
and
was completed. The pier was a 20-
ft-wide stone-filled timber crib structure (Figure 154, Sections
and L).
1889-
A 200-ft-long extension of the north pier was completed (Figure 153,
1895
Section
The extension consisted of a stone-filled timber crib
structure that was 2 4 ft in width (Figure 154, Section K.
)
1928-
Construction of the north and south breakwaters (Figure 153) was
completed during this period, The
1932
portions of the struc-
tures consisted of stone-filled concrete breakwaters (Figure 156,
Sections A, B, and
The crest widths were slightly more than 7 ft
with els of
ft lwd. The outer ends of the breakwaters each in-
cluded 2 rectangular caissons for a distance of 54 ft. The shoreward
ends of the breakwaters were woodpilings spaced from 1 1 to 14 ft
apart (Figures 155 and 156, Sections D, E, F, G, H, I, and J.
)
The
structures were stone filled and capped with concrete and stone
superstructures. The north and south breakwaters ranged from 14 to
ft lwd,
17 ft in width and had crest els of
and
respectively (Figures 155 and 156).
A total of 71,496 tons of riprap was placed along the sides of the
1933-
lakeward ends of the north and south breakwaters (Figure 156, Sec-
1963
tions A, B, and C.
)
The north and south piers (Figure 153) were capped with concrete and
1934
stone superstructures (Figure 154, Sections K, L,
and
N,
0). The piers ranged from 23 to 27 ft in width with crest els of
ft lwd.
The shoreward end of the south pier (Figure 153, Section
1950
reconstructed by the installation of steel sheetpiling on the channel
side (Figure 154, Section
The void between the existing struc-
ture and the new steel sheetpiling was filled with stone and capped
ft lwd.
with concrete at an el of
The lakeward 36 ft of the south pier (Figure 153, Section
1953
repaired by encasing it in steel sheetpiling (Figure 154, Sec-
tion N-1). The new width of the pier was 27 ft. Voids between the
(Continued)
(Sheet 1 of 3)
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