Table 10 



Gas House Cove Breakwater 



Gas House Cove, San Francisco Bay, California 



Date(s) 

 1965 



Construction and Rehabilitation History 



1975 



1986 



Construction of the harbor was completed by the City of San Fran- 

 cisco. Two concrete sheet-pile breakwaters (Figure 15), totaling 

 840 ft in length, initially were constructed by the City. Boat 

 owners immediately complained of excessive wave action and damage 

 to boats and marine facilities resulting from waves entering the 

 basin from the west through the gap in the existing breakwaters and 

 reflecting within the harbor off the vertical walls of Mason Pier. 



The CE completed construction of a 117-ft-long concrete sheet-pile 

 breakwater between and joining the two existing breakwaters. The 

 crest el of the structure was +12.7 ft mllw, and the cost of the 

 project was $334,090. 



There is no record of maintenance or repairs since construction of 

 the breakwater. The structure is in good condition. 



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Figure 15. Gas House Cove, San 

 Francisco Bay, California 



30 



