Shoreline position is referenced to the shoreline position of the profile 

 during the first survey. A linear regression fit to these data indicates that 

 on the average the profile lines accreted at a rate of 3.49 cubic meters per 

 meter (1.39 cubic yards per foot) per year and the shoreline advanced at a 

 rate of 1.66 meters (5.4 feet) per year during this time period (Table 10). 

 Only profile lines 2, 19, 20, and 21 underwent a net erosion. With the 

 exception of profile line 16, profile lines imniediately to the north of the 

 pier displayed a sharp erosional trend during the second phase of pier con- 

 struction (March to August 1976) , which reversed in September 1976. Profile 

 lines immediately to the south of the pier and profile line 16 underwent 

 general accretion during this period. 



Table 10. 



Rates of change for profile lines in vicin- 

 ity of the FRF, May 1974 to January 1977. 



Profile 



Dlytance from 



MSI., shoreline 



Above MSI. unit 



line No. 



frf' 



change^ 



volume change^ 





(m) 



(m/yr) 



(in^/m/yr) 



1 



-5,762 



+3.36 



+8.32 



2 



-/.,7 55 



-3.94 



-15.87 



3 



-2,677 



+1.58 



+6.47 



4 



-1,667 



+A.19 



+15,i0 



5 



-905 



+5.31 



+1A.60 



6 



-524 



+3.57 



+9.88 



7 



-333 



+4.22 



+7.70 



8 



-238 



+3.42 



+3.26 



16 



-48 



+2.58 



+7.16 



17 



+48 



+9.59 



+11.29 



18 



+238 



+5.42 



+10.21 



19 



+619 



+2.40 



-7.63 



20 



+1,381 



-2.36 



0.00 



21 



+2,753 



-1.^6 



-2.87 



22 



+3,834 



+3.97 



+10.43 



23 



+5,039 



+1.85 



+0.92 



Mean ( di r 



tan.ce-weighted) 



+ 1.66 



+3.50 



^PoslLivc distance Is south, negative north. 

 ^Positive value indicates accretion, negative erosion. 



5. Bathymetry. 



Except immediately adjacent to and underneath the FRF, bottom bathymetry 

 is regular with a mild offshore slope. Offshore bathymetry is shown in Figure 

 37. Nearshore bathymetry, surveyed in November 1981, is shown in Figure 38. 

 A noticeable feature at the end of the FRF is a 8.0-meter (26 feet) hole, 

 slightly skewed to the south, which is the result of the pier's effect on the 

 waves, currents, and bottom sediment movements. Figure 39 shows the develop- 

 ment sequence of this hole and plots soundings taken along the FRF centerline 

 from 24 September 1973 to 5 January 1977 (before and after construction). 

 Though the data are incomplete, between 24 November 1974 and 5 January 1977, 

 the profile shape changed markedly with 2 to 3 meters of scour along the outer 

 section of the FRF. 



b3 



