Table 10 

 Maximum Tide Elevation* Data for Upstream Areas 









Date 









Location 



9-17-85 

 6.19 





10-15-85 

 7.44 



11-13-85 

 7.20 



12-12-85 



Boston 



8.01 



Fox Hill Drawbridge 



6.55 





7.65 



7.15 



8.1 (est.) 



Boston Ave. Bridge 



6.1 





7.35 



6.95 



7.9 



Town Line Brook 



6.1 





7.1 



6.65 



— 



East Saugus 



— 





— 



— 



6 (est.) 



* All elevations are for the maximum elevation and are in feet referenced 

 to NGVD. 



upstream of the Fox Hill Draw Bridge. For areas west of the embankment, the 

 curves were lowered by 0.5 ft at 1.5 years, and a straight line was drawn 

 between this level and the original curve at 200 years. The same adjust- 

 ment was made for the areas west of the drawbridge, except the reduction at 

 1.5 years was 0.3 ft. The adjustments were phased out at the higher water 

 levels because, as the water level increases, the access of floodwaters to the 

 back locations in the study area improves. The effect of storm surge is to 

 raise the sea level upon which the tide propagates. Unlike a hurrricane surge 

 time-history, which can be sharply peaked because of rapid changes in both 

 speed and direction of the winds, the time-history of almost all the north- 

 easter surges is very broad with any rapid fluctuations in water level 

 confined to several tenths of a foot. At these higher water levels channel 

 cross sections are increased, the effect of bottom friction is lessened 

 because of greater depths, and new paths of access are created from the 

 overtopping of barriers (roadways). All these factors would tend to negate 

 losses seen in Table 9 for higher water levels. The adjustments to the above 

 mentioned areas are shown as the dotted lines in Figures 52-54. 



100. Differences among the curves presented in Figures 41-54 are small. 

 This small difference is not surprising considering the small size of the area 

 being modeled. In general, the curves are slightly higher for locations in- 

 side the Saugus-Pines River system as compared to locations in Broad Sound. 

 The predominant wind directions during severe northeasters are from the north- 

 east to north. On the inside of the inlet, these directions would tend to 



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