Table 31 (Concluded) 



Date(s) Construction and Rehabilitation History 



el of +7.1 ft Iwd, and riprap was installed on both sides of the 

 structure. The 100-ft-long lakeward end of the north breakwater 

 (Section H) was also capped with a concrete superstructure in 1915. 



1918 The north pier was capped with a concrete superstructure with a crest 

 el of +7.3 ft Iwd (Figure 78, Section P) . 



1925- A concrete and stone superstructure was installed on 1,250 ft of the 

 1926 south pier (Figures 77 and 78, Sections M and N) and 696 ft of the 



north breakwater (Figures 77 and 79, Sections F and G) . The crest el 



of these structures was +7.1 ft Iwd. 



1933 A stone and concrete superstructure was installed on the shoreward 

 1,240 ft of the south pier (Figures 77 and 78, Sections J, K, L, 

 and I). The widths of the superstructure ranged from 15 to 20 ft, 

 and the crest el was +7.1 ft Iwd. 



1963 A 1,728-f t-long portion of the north breakwater was repaired (Fig- 

 ure 77, Sections C, D, and E) . 



1964 The 958-ft-long shoreward end of the south pier was repaired (Fig- 

 ure 77, Section I), and the north pier was rebuilt (Figures 77 



and 78, Section p) . Steel sheet piles were driven on each side of he 

 existing north pier forming a width of 23 ft. The voids were filled 

 with stone and concrete to an el of +7.3 ft Iwd. An 843-f t-long por- 

 tion of the north breakwater also was repaired during this year (Fig- 

 ures 77 and 79, Sections B and Bl). Riprap was installed to the el 

 of the superstructure (+7.1 ft Iwd) on both sides of Section B with 

 1-V:1.5-H side slopes. Stone was installed over Section Bl to an el 

 of +6.75 ft Iwd. The crest was 20 ft wide, and the stone was grouted 

 in place. Side slopes were 1V:1.5H. 



1980 Toe stone was placed along the outermost section of the south pier 



(Figure 77, Section N) to stabilize settling of the structure. Con- 

 crete repair work was completed on the north pier. 



1984 A site inspection of the south pier indicated the channel side of the 

 structure was in good condition. Fill rock was needed, however, in 

 some areas, and the concrete cap was leaning toward the channel in 

 one area. 



1986 The structures presently are considered to be in good condition 

 overall. 



130 



