Table 21 

 Marina Del Rey Structures 

 Marina Del Rey, California 



Date(s) 

 1965 



Construction and Rehabilitation History 



1986 



Construction of a rubble-mound breakwater and two rubble-mound jet- 

 ties was completed at the site (Figure 27). The breakwater was 

 2,330 ft long with a crest el varying from +17 to +22 ft mllw. The 

 crest was 16 ft wide, and side slopes were 1V:2H on the ocean side 

 and 1V:1.25H on the harbor side. The existing Ballona Creek north 

 jetty was extended 760 ft in length and became the marina south 

 jetty, and a 2,000-ft-long north jetty was constructed. The crest 

 els of the jetties were +14 ft mllw with a width of 16 ft. Side 

 slopes were constructed 1V:2H. The breakwater was model tested 

 (Brasfeild 1965) and was necessary to reduce waves entering the 

 wide entrance channel and reflecting off the vertical concrete 

 perimeter walls to an acceptable level. 



The structures presently are in satisfactory condition. 



I TA__ 



P A C I F I C 



NORTH JETTY— -^. 

 CA -^ i 



DETACHED BREAKWATER 

 OCEAN 



JDr 3if 



TYPICAL BREAKWATER SECTION 



EXTENSION OF 

 EXISTING JETTY 



2330-FT-LONG 



Figure 27. Marina Del Rey, California 



49 



