referenced to MLW; therefore, the elevation data were lowered -1.9 ft to convert to the NGVD 

 1929 reference. FDEP survey data for 1972, 1986, and USACE surveys for 1994 through 1997 

 were surveyed to NGVD datum and did not require elevation datum conversion. 



F.6.1. Volume Analysis North of Canaveral Harbor 



The pre-Harbor October 1951 survey was completed by the USACE just prior to the cut 

 through the barrier island for the first 10,500 ft of shore north of the Harbor. The October 1951 

 survey was compared with the May 1954, December 1958, March 1965 to January 1966, 

 February to April 1994, January 1996, May 1996, and May 1997 surveys to determine volume 

 changes. The computed volume changes are listed in Table F-9. The volume changes were 

 computed for the beach profile from the landward limit of the survey data seaward to the -17-ft 

 contour of the October 1951 survey. The 1994 through 1997 survey data were extended 

 landward to the limit of the October 1951 profile data in order to perform the volume 

 comparisons. Some of the available survey data (Table F-4) were not included in the volume 

 computations, such as the October 1956 and January, June, and October 1995 surveys, as there 

 were sufficient surveys for comparison purposes for these time frames. Other surveys (refer to 

 Tables F-3 and F-7) were excluded from the volume analysis because of their limited lineal 

 extent. 



The May 1954 survey repeated and expanded the October 1951 survey. The May 1954 

 coverage extends from 210+00N to 343+98S. The Harbor impact was fairly limited in 1954 as 

 evidenced by volume changes to the -17-ft contour for 10,500 ft of shore north and south of the 

 Harbor of +286,800 and -148,600 cy, respectively (refer to Tables F-9 and F-12). Therefore, the 

 May 1954 survey is better suited as the baseline for pre-project conditions since its lineal extent 

 is twice as great north of the Harbor, and three times longer south of the Harbor as compared 

 with the October 1951 survey. Therefore, volume changes were also computed using the 

 May 1954 survey as a pre-Harbor survey. The May 1954 survey was compared with the 

 November 1958, March 1965 to January 1966, January 1996, May 1996, and May 1997 surveys 

 for the first 13,500 ft of shore north of the Harbor. The computed volume changes are listed in 

 Table F-10. The volume changes were computed for the beach profile from the landward limit of 

 the survey data seaward to the -17-ft contour of the May 1954 survey. The 1994 through 1997 

 survey data were extended landward at the berm elevation (+8.1 ft NGVD) to the limit of the 

 May 1954 profile data in order to perform the volume comparisons. 



The May 1954 survey was compared with the November 1958 and the March 1965 to 

 January 1966 surveys for the first 21,000 ft of shore north of the Harbor. The computed volume 

 changes are listed in Table F-ll. The volume changes were computed for the beach profile from 

 the landward limit of the survey data seaward to the -17-ft contour of the May 1954 survey. The 



p_34 Appendix F Brevard County Federal Projects and Surveys 



