Table 2 



East Breakwater, Cleveland Harbor 



Cleveland, OH 



NCD. NCB 



Date(s) Construction and Rehabilitation History 



1887-1900 Construction of 3,000 ft of east breakwater; timber crib 

 construction. 



1903-1915 Construction of 17,970 ft of east breakwater; keyed and fitted, 

 specially shaped armor stone. 



1917-1926 Addition of armor stone to the 3,000 ft of east breakwater 

 previously constructed between 1887 and 1900. 



1927 Repairs made to various reaches of the east breakwater during 



1928 each of these years; original construction methods used in 

 1930 making repairs. 



1932-1934 

 1936-1940 

 1946-1978 



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



(sta 230+00 to 274+00) using 29,500 2-ton unreinforced dolosse; 

 two layers placed on lake side of trunk and around head using 

 placement density of 161 dolosse per 25 lin ft of breakwater. 



1982 Repair of head damage (April 1982 storm) using 200 2-ton 

 unreinforced dolosse. 



1985 Rehabilitation of an additional 3,300 ft of east breakwater 



trunk; two layers of 9- to 20-ton armor stone to be placed on 

 the sea-side slope (model-tested, Markle and Dubose 1985). 



NOTE: Design Storm Conditions. 8.8-sec, 13.4-ft nonbreaking waves; a 



l-in-20-year occurrence wave, plus a 10-year maximum monthly mean lake 

 level plus a short-term lake level fluctuation used resulting in a 

 l-in-200-year event assuming all events independent. 



Maximum Storm Condition Exposure. 12-ft waves hindcast from April 

 1982 storm wind data. 



