Table 85 (Concluded) 



Date(s) Construction and Rehabilitation History 



1963 Rehabilitation of 1,000 ft of the protective riprap slope on the 



lakeside of the west breakwater (Figures 226 and 227) was performed. 



1979 Portions of the west breakwater were rehabilitated (Figure 229). The 

 concrete cap was restored to its original height, and new armor stone 

 was installed along the lakeside of the riprap slope. The eastern 

 portion of the east breakwater was in poor condition during a site 

 inspection. 



1980 Rehabilitation of 4,400 ft of the eastern end of the east breakwater 

 (Figure 226, Section D) was performed using 29,700 two-ton unrein- 

 forced dolos concrete armor units. Two layers of dolosse were placed 

 on the lakeside of the trunk and around the head using a placement 

 density of 161 dolosse per 25 lin ft of breakwater. The slope was 

 IV: 2H. Model tests were not conducted prior to installation of the 

 dolosse. 



1982 Repair of the head of the east breakwater following a storm in April 

 was completed using 200 two-ton unreinforced dolosse. 



1982- Model tests were conducted to determine the breakwater modifications 



1983 necessary at the west (main) entrance to accommodate the passage of 

 1 ,000-ft-long ore carriers (Bottin 1983). Breakwater modifications 

 at Edgewater Marina (adjacent to the west breakwater) for wave pro- 

 tection also was investigated in the model (Bottin and Acuf f 1983) . 



1984 An inspection of the east breakwater (Figure 226, Section D) revealed 

 659 broken dolosse. Many of these units were broken during initial 

 placement. A concentration of broken dolosse near the top of the 

 slope at the head was believed to be remnants of those broken during 

 the 1982 storm. In general, dolosse are generally confined to the 

 upper third of the structure slope and are at about 2 percent of the 

 total number placed. 



1985 A contract was awarded to rehabilitate an additional 3,300 ft of the 

 east breakwater (an area of Section P (Figure 226) adjacent to the 

 dolos rehabilitation) . The repairs involved placement of 9- to 

 20-ton armor-stone mix. Model testing was conducted prior to reha- 

 bilitation work (Markle and Dubose 1985) . 



1986 Repairs have been extensive at Cleveland Harbor over its lifetime 

 (particularly to the east breakwater) . Until recently the structure 

 was repaired in a manner similar to the original construction using 

 3- to 8-ton stone. Consequently, maintenance on the breakwater dur- 

 ing a 19-year period (1966-1984) involved repairs to about 12,500 lin 

 ft of breakwater at an expenditure in excess of $17,000,000. Since 

 the latest rehabilitation, the structures are considered to be in 

 good condition. Aerial photos showing the Cleveland Harbor struc- 

 tures are presented in Figures 230-233. 



338 



