Table 55 (Continued) 



Date(s) Construction and Rehabilitation History 



existing structure and the steel sheetpiling were filled with stone 

 and the area capped with concrete. 



1958 Construction of a new north pier head and repair of the adjacent 



200 ft of the north pier (Figure 153, Sections K-1 and K) was com- 

 pleted. The pier head consisted of a circular steel sheet-pile cell 

 with a diameter of 23.75 ft. The cell was stone filled and capped 

 with concrete to an el of +5.0 ft, and riprap was placed around its 

 base on a 1-V:1.5-H slope. Section K was encased in steel sheet- 

 piling (Figure 154). Voids were filled with stone, and the area be- 

 tween the existing pier and the new steel sheetpiling was capped with 

 concrete at an el of +5.0 ft Iwd. The new pier width was 33 ft. 



1960- The shoreward portion of the north pier (Figure 153, Sections L-1 

 1961 and L) was encased in steel sheetpilings (Figure 154) resulting in a 

 new pier ranging from 29.75 ft (Section L) to 33 ft (Section L-1) in 

 width. The voids between the new steel sheetpiling and the existing 

 piers was filled with stone and capped with concrete (Figure 154) . 



1966 The shoreward portion of the south breakwater (Figure 153, Sec- 

 tions F, G, H, and I) was rehabilitated. Rehabilitation consisted of 

 the placement of stone along the structures (Figure 155) on slopes of 

 1V:1.5H. Cover stone ranged from 9 (min) to 12 tons (max) along Sec- 

 tion F, 6 (min) to 8 tons (max) along Section G, and 3.5 (min) to 

 5.5 tons (max) along Section H (Figure 155) on both sides of the 

 breakwater. Riprap (1 ton) cover stone was installed on the lakeside 

 only of Section I. 



1977 Portions of the north breakwater (Figure 153, Sections D and E) were 

 replenished with fill stone, and the structure was grouted over with 

 concrete. 



1981 Riprap stone was placed around the heads of both the north and south 

 breakwaters (Figure 153, Section A). The lakeward end of the south 

 pier (Figure 153, Sections N and N-1) was repaired by encasing it in 

 steel sheetpiling (Figure 154, Sections N and N-1). Voids between 

 the existing pier and new steel sheetpiling were filled with stone 

 which was covered with a concrete cap at an el of +7.0 ft Iwd. Sec- 

 tion N was 30 ft wide, and Section N-1 was 32 ft wide (Figure 154). 



1982 The landward portion of the south pier (Figures 153 and 154, Sec- 

 tion 0) was repaired, and riprap was placed on the channel side of 

 the pier with 1-V:2.5-H side slopes. Fill stone also was replenished 

 in the north pierhead cell (Figure 153, Section K-1). 



(Continued) 



(Sheet 2 of 3) 

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