Table 48 



Muskegon Harbor Structures 



Muskegon, Michigan 



Date(s) Construction and Rehabilitation History 



1868- Construction of a 703-ft-long north pier and a 692-ft-long south 

 1890 pier (Figure 130) was completed during this time. The piers were 

 originally built with woodpilings and ranged from 18 to 32 ft in 

 width. The area between the pilings was filled with stone and tim- 

 ber, and the piers were capped with a timber superstructure. 



1906 The north pier was rebuilt with timber pilings similar to the origi- 

 nal construction. 



1927- Construction of the north and south breakwaters (Figure 130) was 

 1931 completed. (Figures 130, 131, and 132 illustrate structures at 



Muskegon Harbor.) The north breakwater was a rubble-mound structure 

 (Figure 132, Sections A and B) that was capped with 8- to 10-ton 

 armor stone (Section A) with the exception of the shoreward end (Sec- 

 tion B) which had 1- to 5-ton armor protection. The crest el of the 

 structure was about +8.5 ft Iwd, and side slopes were 1V:1.5H. The 

 lakeward portion of the south breakwater (Figure 132, Sections C, D, 

 and E) was constructed with stone-filled concrete caissons on wood- 

 pilings. These structures had concrete caps that were 7.3 ft wide at 

 the crest with an el of +7.1 ft Iwd. The shoreward portion of the 

 south breakwater (Figure 132, Sections F, G, and H) was composed of 

 woodplling with a stone fill and concrete and stone superstructures. 

 The structures ranged from 14 to 17 ft in width and had crest els 

 ranging from +7.1 to +7.4 ft Iwd. The outer 54 ft of the south 

 breakwater consisted of two rectangular stone-filled concrete 

 caissons. Riprap with a 1-V:2-H side slope was placed along the 

 sides of most of the structure. 



1932- The north and south pier superstructures were rebuilt and consisted 

 1934 of concrete and stone construction (Figure 131, Sections N, 0, and 

 P). 



1942- During this period a total of 16,757 tons of riprap stone was placed 

 1954 along the sides of the south breakwater (Figure 132, Sections C, D, 

 E, F, and G) . 



1960- An additional 4,832 tons of riprap was placed along the south break- 

 1963 water at Sections E and F (Figure 130). 



1966 The south pier (Figure 130, Sections N, 0, and P) was rehabilitated 

 by encasing it in steel sheetpiling. The voids were filled between 

 the sheetpiling and the existing structure, and the pier was capped 

 with concrete. The new el was +8.5 ft Iwd, and the width ranged from 

 35 to 45 ft. A portion of the south breakwater (Figure 130, Sec- 

 tions F and G) was rehabilitated also. Fill-stone replenishment and 

 regrouting of the superstructure was accomplished, and additional 

 riprap stone was placed along the shoreline. 



(Continued) 



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