Table 50
Pentwater Harbor Piers
Pentwater, Michigan
Date
Construction and Rehabilitation History
1868-
D, and E) and a 620-ft-long south pier (Figure 136, Sections B, H,
1870
and J) was completed during this period. The shoreward 439 ft of
the north pier was constructed with woodpilings (Figure 137, Sec-
tions D and E) that were spaced 14 ft apart and stone filled. The
remaining portions of the north pier and the entire south pier (Fig-
were constructed with stone-filled
timber crib structures. The width of the timber cribs at the north
pier (Sections B and C were 20 ft, and the south pier timber crib
)
structures (Sections B, H, and J) ranged from 20 to 32 ft in width.
1872
timber crib structure. The pier extension was 30 ft wide and filled
with stone (Figure 137, Section A ) .
The south pier was extended by 101 ft (Figure 136, Section G.
)
1887
The
extension included a 30-ft-wide stone-filled timber crib structure
(Figure 137, Section G.
)
1938
The north and south piers were capped with concrete and stone super-
structures (Figure 137). The crests of the piers were installed at
ft lwd. The piers ranged in width from 1 to about
8
an el of
37.5 ft. The widths of two portions of the north pier (Figure 137,
were increased by installing woodpilings on the
Sections A and
channel side and filling the voids with stone prior to capping the
structures.
A 60-ft-long rubble-mound extension to the north pier was completed
1959
crest width and an el
of
ft lwd (Figure 137). Side slopes were
and 9-ton
toe stones were utilized.
1971
Riprap stone was placed around the head and on the lakeward side of
the rubble-mound portion of the north pier (Figure
and stone
replenishment and regrouting was completed for the remaining portion
of the north pier (Sections A , B, C, and D. Riprap also was placed
)
around the head of the south pier, and fill stone placement and re-
grouting were completed for Section B (Figure 136) of the south pier.
Riprap was placed along the lakeside of a portion of the south pier
1981
(Figure 136, Section H.
)
1982
Small core stone was placed into gaps of the rubble-mound portion of
the north pier (Figure 136) between the cover stones. Fill stone
(Continued)
220
I
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