this study.) Because of the delay in the poststorm survey and the rapid 
recovery observed at Westhampton Beach pipe profiles, it is probable that 
the poststorm survey is not an accurate picture of maximum erosion at 
Jones Beach. Profile line locations are shown in Figure 15, surveyed beach 
profiles in Figure 16, and MSL contour and area changes in Table 6. Maxi- 
mum erosion occurred at profile line 04. Profile lines 08 and 09 showed 
the only net accretion. Maximum erosion occurred between the 9- and 4- 
foot contours on all profile lines. Either accretion or less severe ero- 
sion, occurred between the 3- and 1-foot contours. Nine of the 16 post- 
storm profiles indicated additional erosion below the 1-foot contour. 
Table 6. Shoreline and unit volume changes at Jones 
Beach for 17 December 1970 storm. 
Profile MSL PRCHAR} Plus 12! 
line shoreline change unit volume | unit volume 
(ft) (yd3/ft) (yd3/ft) 
02 0 -4.0 
03 .0 -4.0 
04 4 -18.9 
07 .8 -10.4 
08 4 eZ 
09 6 Boll 
10 7 -8.6 
11 8 -2.1 
12 4 -9.4 
13. aS) -5.6 
14 5 -14.5 
15 af -11.7 
16 AS -7.5 
/, 25 -16.5 
18 2 -1.2 
Average a7 a 
lSee Figure 8 for definitions. 
2Poststorm survey did not reach MSL. 
Profile line 02, the eastern limit of the Jones Beach survey, is 
located approximately 1 mile west of the dike at Fire Island Inlet. There 
was slight accretion at the 4-foot contour, with erosion occurring along 
the rest of the profile. 
4 
