Table 18 



Sandy Bay Harbor of Refuge Breakwater 



Sandy Bay, Mass. 



Date(s) 



1886- 

 1916 



Construction and Rehabilitation History 



1986 



Partially completed during this period were 6,100 ft of a planned 

 9,000-ft-long cut stone and rubble-mound breakwater (Figure 21). The 

 breakwater's southern and western arms were 3,600 and 2,500 ft long, 

 respectively. As built, the breakwater consisted of a rubble-mound 

 substructure built to mlw where the width was 81 ft. Approximately 

 922 ft of superstructure was constructed at the junction of the 

 breakwater arms. The superstructure consisted of a rubble-mound core 

 and a cover layer of stone blocks stacked horizontally in an over- 

 lapping step-wise fashion to elevation of +22 ft mlw, a 20-ft top 

 width, and 1 V: 1H side slopes. Additional armor stone, weighing a 

 minimum of 10 tons, was placed on the seaward face to a 1V:2H side 

 slope. Total costs were $1,941,500. 



The breakwater has no repair history, and the uncompleted portion is 

 inactive. Its original purpose, to provide a harbor of refuge, has 

 become obsolete due to the advent of powered vessels and their 

 ability to seek refuge at existing harbors. 



BREAKWATER SECTION 



Figure 21. Sandy Bay Harbor of Refuge breakwater 

 and location of Rockport Harbor, Sandy Bay, Mass. 



43 



