being measured at gaging stations at various points in the model. 

 Similarly, hurricane surges are reproduced by a large wave machine 

 and the tidal surge can thus be superin5)osed on the astronomical 

 tide. Results of the model were adjusted for wind effects in the 

 b^ (see Appendix B), 



The model tests have shown that with a siirge equal to that 

 which occurred during the hiu-ricane of September 1938* Lower Bay 

 barriers would reduce the still-water level at Providence by 

 8 feet, from an elevation of 15.7 feet above mean sea level to 

 an elevation of 7.7 feet. At Newport, the level would be 

 reduced by 7.U feet from the observed level of 11.0 feet above 

 mean sea level to an elevation of 3.6 feet. Plates 8 and 9 show 

 maximum tidal levels that actually occxirred in the area during 

 the 1938 hurricane and the reduced levels that would occur with 

 the Lower Bgy barriers in place. With a design flood, the still- 

 water levels would be reduced by 3 to 10 feet. The reduction in 

 hurricane tide levels with the plan of protection in effect is 

 shown in Table h for key locations in the bay. 



TABLE h 



REDUCED FLOOD LEVTSLS 'WITH PLAN IN EFFJX3T 

 NARa.'CiU\^SETT BAY AREA 



Notes: 



Elevations are in feet above mean sea level. 



(1) Above Fox Point barrier 



(2) Directly below i-'ox Point barrier 



