(2) The barrier would be of rock and earth fill con- 

 struction. The top width would be 15 feet and the side slopes 1 

 vertical on 2 horizontal. The land dikes, east and west of the 

 barrier, would be similar in design, except that the side slopes 

 would be 1 on 3 on the land side and 1 on 2 on the sea side. The 

 crests of barrier and dikes would be at an elevation 20.0 feet 

 above mean sea level. 



(3) A gated navigation opening 100 feet wide and 30 

 feet deep at mean low water would be included. Sector gates 

 would be used for closing the opening, 



ik) Pertinent data on the Tiverton barrier are 

 siimmarized below: 



Barrier 



Type 



Top Elevation, feet m.s.l. 



Length, feet 



Maximum Height, feet 



Side Slopes 



Top Width, feet 



Rock and earth fill. 



20,0 



912 



82 



1 on 2 



15 



Dike 



Type 



Top Elevation, feet m.s.l. 



Length, feet 



Maxiraum Height, feet 



Top Width, feet 



Navigation Opening 



Type 



Width, feet 



Sill Elevation, feet below m,l,w. 



Top Elevation, feet m.s.l. 



Rock and earth fill 



20.0 



8,513 



30 



15 



Sector gate with 



concrete abutment 



100 



30 



20.0 



b. Lands and damages . The land requirements would include 

 rights-of-way, maintenance areas and easements. The construction 

 of the barrier would involve no relocation of highways or utili- 

 ties. It would be necessary, however, to abandon portions of the 

 roais south of Fountain Spring Avenue and Sakonnet Boulevard 

 which now furnish access to the beach. 



F-15 



