TABLE B-5 (cont'd) 



HURRICANES OR SEVERE STORMS 



NARRA3ANSETT BAI AREA 



(1635 to 1955) 



Maxlinum Tidal Elevation at Providence, R.I. 



Original 

 Record 



Table 6-6 shows the tidal flood elevations rearranged in order 

 of magnittide vith calculated plotting positions in percent chance 

 of occurrence in any one year based on three periods; (l) the period 

 from 1931 to 1955 (25 years) for which records are available at 

 Newport or Providence; (2) the period frcMi I8l5 to 1955 (litl years) 

 to include newspaper accounts of great floods; and (3) the 321-year 

 period between 1635 and 1955 for the purpose of plotting the 

 approximate elevations of the 1635 and I638 floods. A tidal flood 

 elevation-frequency curve for Providence is given in Plate B-5. 

 The estimated frequency of recent hurricanes and the design tidal 

 flood is indicated in the following tabulation: 



Maximum Tidal Percent Chance of 

 Hurricane Elevation Occurrence in Year 

 (ft. above m.s.l.) 



September 21, 1938 15.7 1.10 



August 31, 195U (Carol) li;.7 1.70 



Design tidal flood 18. 7 0.28 



B-18 



