Table 3 



Outer Breakwater, Crescent City Harbor 



Crescent City, California 



SPD, SPN 



Date(s) Construction and Rehabilitation History 



1930 Construction of 3,000-ft main stem of breakwater (sta 0+00 

 to 30+00); armor stone. 



1948 Construction of 1,000-ft extension of main stem (sta 30+00 



to 40+00); armor stone. 



1949 Repair of main stem (sta 30+00 to 40+00) and extension of main 



stem to sta 42+00; armor stone. 



1950 Repair of main stem (sta 30+00 to 42+00) using armor stone and 



addition of concrete cap to crown of breakwater except for area 

 between sta 12+34 and 15+34. 



1957 500 ft of main stem (sta 37+00 to 42+00) abandoned; addition of 

 1,000-ft dogleg (sta 37+00 to 47+70); 12-ton stone protection 

 used from sta 37+00 to 41+20; beginning at sta 41+20, two 

 layers of 25-ton unreinforced tetrapods (1,836 units) placed on 

 sea-side slope (model tested, Hudson and Jackson 1955, 1956) 

 and around head of dogleg; 140 of same size tetrapods placed on 

 existing stone armor protection of sea-side slope of first 

 200 ft of dogleg adjacent to main stem(sta 37+00 to 39+00). 

 These 140 tetrapods not placed in coherent two layers, and this 

 area of repair not model tested. 



1974 Rehabilitation of main stem of breakwater (sta 34+70 to 37+00) ; 



two layers of 40-ton unreinforced dolosse (246 units) placed on 

 sea-side slope (not model tested) . 



1979 Repair of following reaches using 18- to 30-ton stone: sta 19+00 

 to 20+00, sta 22+00 to 24+00, sta 24+60 to 27+20, sta 28+90 

 to 29+50, sta 30+50 to 31+00, and sta 37+00 to 41+20; sta 15+50 

 to 17+50 repaired using 14- to 25-ton stone (none of the above 

 model tested) . 



1986 Additional rehabilitation of main stem of breakwater (sta 34+70 

 to 37+00); two layers of 42-ton fiber-reinforced concrete 

 dolosse (about 450 units) to be placed on sea-side slope (model 

 tested, Baumgartner, Carver, and Davidson 1985). 



NOTE: Design Storm Condition. 21- to 35-ft breaking waves (1-in-lOO-year 

 occurrence) . 



Maximum Storm Condition Exposure. Design conditions. 



