Section 15 

 CHAKLESTCJN, SOUTH CAEOLINA — U. S. HAVAL BASE 



A15.01 Location of the Test Station and Test Boards 



Five test boards of the panel type were Installed July 1, 19^1-, 

 at tlaree different locations at or near the Charleston Naval Base at 

 Charleston, South Carolina. The locations and symbols used to designate 

 these test "boards are listed as follows: 



Symbol Location 



U5NC-1 Pier 517-C ~ lower hoard 



USNC-IU Pier 517-C — upper "board 



XJSNC-2 Deperming Station (Pler 520 ) lower "board 



■DSNC-aU Deperming Station (Pier 520) upper "board 



"03150-5 Custom House Pier 



As the experience in this locality indicated greater damage tram. 

 marine "borers in timber structures hetween the elevations of mean low 

 water and mean high water than at lower depths, it was decided to i nstall 

 upper and lower "boards at two locations. Thus, at Pier 517-C and at the 

 Deperming Station (Pier 520), 2 sets of test "boards were hung, one a'bove 

 the other. The upper "boards, which were suspended with the top elevation 

 at mean low water, have the letter "U" after the panel numbers and are so 

 designated in the hoard symbols. The lower hoards at these two locations 

 were suspended so that the hottom of the lower panel was 2 ft a'bove the 

 mud line. 



The depth of water at the U. S. Naval Fleet TfliDili.ng heing insuf- 

 ficient to cover the hoard at low tide, it was decided to make the in- 

 stallation of test hoard USISC-5 at the adjacent Custom House Pier. 

 Permission was granted hy the U. S. Engineers Office, Charleston, 

 South Carolina, to malce this Installation. 



The current and the corrosive action of the water caused failure 

 of the cahle supporting Test Board USNC-1 at Pier 517-C, and the hoard 

 was lost after the last of the first series of panels was removed and 

 replaced. This hoard was replaced hy a new hoard on March 3j 19^5. At 

 the same time, the cahles holding the other hoards were renewed so as to 

 prevent the loss of these hoards. The test hoards installed at the 



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