Table 8 



San Leandro Marina Breakwater 



San Leandro Marina, San Francisco Bay, California 



Date(s) 

 1963 



1966 



1977 



Construction and Rehabilitation History 



1986 



Construction of the Marina by dredging and landfill operations was 

 completed by the City of San Leandro. 



The City completed construction of a 750-ft-long dredged material 

 breakwater. It was composed of stiff clays dug from the adjacent 

 channel during dredging and had a crest el of +13 ft mllw. After 

 construction the breakwater eroded, and gaps were filled period- 

 ically with dredged material as a temporary solution. 



The CE completed improvements to the breakwater which consisted of 

 shaping the mud island and placing riprap protection. The finished 

 structure was 700 ft long with a crest el of +12 ft mllw and side 

 slopes of 1V:4H (Figure 13). The breakwater was designed to 

 withstand breaking waves of 4 ft. Cost of the improvements was 

 $3^8,579. After construction, top soil was placed on the struc- 

 ture, and lost vegetation was replaced to restore wildlife. 



There is no record of maintenance or repairs subsequent to Federal 

 improvements, and the structure is in good condition. 



TRUE SCALE 



Figure 13. San Leandro Marina, San 

 Francisco Bay, California 



28 



