. Case histories of Corps breakwater and jetty structures. Report 3. Breakwaters; Jetties; Breakwaters; Jetties. Table 67 Au Sable Harbor Jetties Au Sable, Michigan Date(s) 1962 Construction and Rehabilitation History 1975 1984 Construction of north and south jetties (Figure 181) was completed. The shoreward 980 ft of the north jetty and 1,000 ft of the south jetty were constructed with steel sheetpiling at a crest el of + ft Iwd (Figure 182). The lakeward 227 ft of the north jetty and 200 ft of the south jetty were constructed with diameter steel sheet-pile cells. The cells were st
. Case histories of Corps breakwater and jetty structures. Report 3. Breakwaters; Jetties; Breakwaters; Jetties. Table 67 Au Sable Harbor Jetties Au Sable, Michigan Date(s) 1962 Construction and Rehabilitation History 1975 1984 Construction of north and south jetties (Figure 181) was completed. The shoreward 980 ft of the north jetty and 1,000 ft of the south jetty were constructed with steel sheetpiling at a crest el of + ft Iwd (Figure 182). The lakeward 227 ft of the north jetty and 200 ft of the south jetty were constructed with diameter steel sheet-pile cells. The cells were stone filled and capped with concrete to an el of + ft Iwd (Figure 182). Riprap was placed on each side of the cellular portions of the breakwater (Figure 182) and along some portions of the steel sheet-pile structures (Figure 181). Rehabilitation of the north and south jetties was completed for a cost of about $392,000. This work included repairs for broken and sunken cell caps and replenishment of riprap in various areas. An inspection of the jetties revealed them to be in very good con- dition. An aerial view of the Au Sable Harbor jetties is shown in Figure Figure 181. Au Sable Harbor, Michigan 280. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bottin, Robert R; U. S. Army Engineer Waterways Experiment Station; United States. Army. Corps of Engineers; Repair, Evaluation, Maintenance, and Rehabilitation Research Program. [Vicksburg, Miss. : U. S. Army Engineer Waterways Experiment Station ; Springfield, Va. : available from National Technical Information Center]
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