Table 9 



San Pedro Breakwater, Los Angeles, California 



SPD, SPL 



Date(s) Construction and Rehabilitation History 



1912 Construction of the 11 , 150-f t-long dimensioned stone breakwater 

 completed. 



1917 Ship collision damaged a 50-ft section of structure. 



1918 Damage from ship collision repaired using 1,000 tons of salvage 



stone and 200 tons of new stone. 



1941 Wave-induced damage that occurred in 1939 repaired by returning 

 displaced dimension stones to original positions. 



1983 Storm on 21 March 1983 caused damage, including breaches of 



superstructure at six locations as well as displacement of 

 numerous dimension stone. Largest breach 400 ft long; smaller 

 breaches varied from 20 to 80 ft. 



1984 Breaches repaired with 7- to 20-ton angular shaped capstone 



(first use of dissimilar armor) and spot damage repaired by 

 retrieving and replacing displaced dimension stone. 



1986 Major breach repair with additional 13- to 20-ton capstone 



(model tested, Baumgartner, Carver, Davidson, and Herrington, 

 1986). 



NOTE: Design Storm Conditions. Original design condition unknown. 



Maximum Storm Condition Exposure. Storm of 21 March 1983 produced 

 8- to 16-sec, 15.6-ft nonbreaking waves. 



