nmmt<mm 



"^**sp^ 



'fm^MKats. 



Figure 23. Looking north along the granite block superstructure of the breakwater (1916). 



(7) Structural Performance (U.S. Army Engineer Division, New England, 1972). 



(a) Effectiveness of Structure. During construction, it was decided to complete 

 900 feet of the breakwater and await the test of storms, ice and expansion due to summer 

 heat. With the disappearance of commercial saihng vessels, continuation of the project was 

 not economically justified. The breakwater as completed reduced, to some extent, sea 

 conditions in the bay during easterly storms but had little effect on storms out of the 

 northeast to north. At present, the structure offers Uttle use to commercial or recreational 

 mariners. 



(b) Integrity of Structure. Since 1916 the superstructure of the western arm has 

 been almost completely destroyed (75 feet of deterioration between 1968 to 1972). Except 

 for minimal damage at the south end and slight shifting of capstones, the southern arm is in 

 excellent condition. Damage to the western arm is primarily by severe wave attack from the 

 northeast and stopping construction without properly providing temporary end protection. 

 Because of orientation of the structure, northeast waves have less effect on the southern 

 arm. 



(8) Effect of Structure on Environment. 



(a) Physical. Local townspeople have stated that the partially constructed 

 breakwater is a hazard to navigation and should be either completed or removed. In the 



47 



