Table 16 

 Port San Luis Breakwater 

 Port San Luis, California 



Date(s) Construction and Rehabilitation History 



1888- Construction of a rubble-mound breakwater, approximately 2,400 ft 

 1913 long, was completed at the site (Figure 22) during this time frame. 

 The crest el of the structure varies from +14 ft to +18 ft mllw 

 with a 14-ft width. The side slopes are 1V:1.5H on the ocean side 

 and 1V:1.25H on the harbor side. 



1924 The structure was breached in a zone about 300 ft seaward of 

 Whalers Island (Figure 22) by storm waves. 



1927 The breach formed in 1924 was filled with a concrete cap. 



1931 The concrete cap placed in 1927 was washed away because of storm 

 wave activity. Also, the head of the breakwater was damaged. 



1935 Repairs were made to damaged areas of the structure. The slopes in 

 the damaged zones were covered with 1 4-ton stones to els of -10 to 

 -15 ft mllw. 



1976 Modification of the existing project was authorized. Included were 

 a 750-ft-long south breakwater, a 3,615-ft-long detached break- 

 water, and dredging of associated channels and anchorage areas 

 (Figure 22). These structures have not been constructed. 



1983 Major storms resulted in approximately $578,000 in damages to the 

 breakwater. 



1984 Maintenance repair of the existing breakwater was completed which 

 consisted of approximately 8,700 tons of capstone placement and 

 resetting of 40 existing capstone. The crest width of the struc- 

 ture was increased to 20 ft. Plans and specifications for con- 

 struction of the modified project (authorized in 1976) were about 

 80 percent complete. 



1986 The breakwater currently is in satisfactory condition. 



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