o A significant excavation is planned for the 



below-grade garage area; existing foundations, 

 portions of the granite block seawall and boulders in 

 the glacial till will be encountered. 



o With the exception of buried granite blocks which may 

 be excavated and reused for construction of shore 

 protection structures, excavated soils will probably 

 be unsuitable for reuse except in landscaped areas and 

 other non-structural application. 



o Past experience with similar granite block seawalls in 

 the Boston Harbor area indicate that these structures 

 have been found to have a marginal factor of safety. 

 Further analysis of the seawalls and shore protection 

 structures should be completed from both a structural 

 and geotechnical background. 



0298W 



AQX 



-22- 



1 1 



93 



