The above data are for wave free water levels. Wind-driven 

 water and waves will add to the water levels during storm 

 conditions. 



Lowest site grades are normally set at or above El. 110.5 

 (NACA) in the Boston area and the lowest recommended design 

 floor level to avoid tidal flooding is normally taken at El, 

 111.5 although El. 112.5 is preferred. 



00 82 



