Sectl^m 25 

 GUAKTAKAMO BAY, CUBA — U. S. MVAL OPERATIIG BASE 



A23.OI Location of the Test Station and Test Board 



A test "board of the panel type was Installed June 20, 19*^^* at the 

 U. S. Naval Operating Base, Guantanamo Bay, Cuha, "but was soon lost. A 

 duplicate test "board, designated "by the symbol USWGIC-1, was installed on 

 Jiily 15, 19hh, on Pier No. 1, and the test -is considered to "begin from 

 this date. 



In Itecem"ber 194U the laval Operating Base advised that they were 

 unaMe to send the panels for that month "because the test "board had "been 

 takeA away "by a visiting ship. A new "board was installed on Decem"ber 22. 

 The operation of this test "board is "being continued, and the results 

 have "been summarized to the end of 19^7 • 



It was reported that creosoted pine piles last a"bout 5 years at this 

 location. It also was reported that, as far as can "be ascertained, the 

 most resistant native hardwoods for piles are those locally known as 

 "jiqui" and "jucaro negro." Jiqui piles have "been known to last over 

 20 years, "but the tree is now almost extinct, at least as far as 

 sizahle tim"ber is concerned. Jucaro negro hardwood, which can "be 

 procured in logs a'bout 55 to kO feet in length, remains serviceahle 

 here for a'bout 7 years. 



A25.02 Eydrographic Data 



The depth of water where the test board was installed was 40 ft; 

 the tidal range was 12 in. (mean difference); the current was not 

 apprecia"ble . The temperature of the water at the time of installation 

 was 82° F. The test "board was located in what may "be considered open 

 "bay water, with the nearest sewer outlet 1,000 ft distant. It is suspended 

 from the side of a pier which had "been "built a'bout a year previous. This 

 pier has creosoted piles with approximately one- inch penetration, "but 

 all of the "bracing is constructed of untreated tlm'ber. 



A25 . 05 I'farine Borers 



1. Teredinidae. Teredinidae , including Teredo ( Teredothyra ) 

 dominicensis , T. ( Lyrodus ) sp., T. ( Psiloteredo ) sp., and T. sp., were 

 very active and extremely a"bundant throughout the period covered "by the 

 test. It. Novem"ber of 19^i|-, after the test panels had "been su"bmerged for 

 only h months, the attack was so severe that it "became evident that the 

 panels would "be completely destroyed "before the date scheduled for their 

 removal. It was therefore requested that all the panels "be removed and 

 replaced with panels 2 inches thick. However, increasing the thickness 



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