Diameter measurements were obtained using calipers with measurement 

 accuracy of -0.25 inch recorded to the nearest 1/2 inch rounded down. 

 The sampling plan developed by NCEL was used to specify which pilings 

 were to be inspected within each pier. Childs Engineering Corp. provided 

 additional measurement data that were required as part of the -normal 

 FPO-1 inspection contract. These samples were used to test the effect 

 of larger sample sizes on the measurement statistics and to gather suf- 

 ficient data to test the assumption that the distribution of pile diam- 

 eters is normal. 



Inspection of Steel Sheet Piles at Naval Station, Mayport 



The second opportunity to evaluate the underwater inspection sampling 

 plan was during the inspection of steel sheet piling at Naval Station, 

 Mayport, FL. This inspection was conducted by Ogaltree Engineering under 

 the direction of personnel from CHESDIV Code FPO-1. The inspection was 

 performed during October and November 1985. The initial plan was to 

 collect data from three separate facilities that would provide sample 

 data from about 30 stations (i.e., 10 stations per berth or wharf with 

 data collected from 3 elevations per station). This plan had to be modi- 

 fied during the inspection, as described below, to conform to contractual 

 requirements lor the inspection. 



The Naval Station at Mayport, FL, has two carrier berths; three 

 wharves for berthing destroyers, frigates, etc.; four destroyer berths; 

 one ammunition berth; a small craft berth; and three support vessel 

 berths (Figure 22). Because the construction of the berthing facilities 

 at Mayport spans a time period of over 34 years, with new berthing 

 facility construction occurring throughout the 34 years, a stratified 

 sample plan was implemented. That is, the Mayport port facility was 

 divided into separate berthing sites by date of construction. Table 3 

 lists the 10 separate berthing facilities along with their years of con- 

 struction, station numbers (inclusive), and the database filename used 

 for the analysis of the data. 



Table 3. Naval Station, Mayport, FL 



Facility Identification 



Year 

 Constructed 



Stat 



ions 



Database 

 Name 



Bulkhead East of C2 



various 



0+00 - 



3+31 



MAYC2E 



Carrier Berth C2 



1960 



3+13 - 



10+75 



MAYC2 



Bulkhead Between C1-C2 



1952 



10+75 - 



17+31 



MAYC1C2 



Carrier Berth CI 



1952 



17+31 - 



24+69 



MAYC1 



Bulkhead From CI to B3 



1952 



24+69 - 



31+99 



MAYC1B3 



Berths Bl, B2, and B3 



1970 



31+99 - 



51+83 



MAYB123 



Berth Al 



1980 



51+83 - 



61+01 



MAYA 



Berths Dl, D2, D3, and D4 



1959 



61+01 - 



81+83 



MAYD 



Small Boat Berth 



1959 



81+83 - 



85+83 



MAYSB 



Berths El, E2, and E3 



1983 



81+83 - 



103+23 



MAYE 



28 



