Accession Number : AD0722176

Title :   1970 Inspection of Experimental Marine Piling.

Descriptive Note : Final rept. Mar 69-Mar 70,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s) : Hochman,Harry

Report Date : JUL 1970

Pagination or Media Count : 14

Abstract : The 54 Cooperative piles at Coco Solo, Canal Zone and the 273 Cooperative and NCEL experimental piles at Pearl Harbor, Hawaii were inspected during the weeks of 9 and 23 March 1970, respectively. After 7 years of exposure at Coco Solo, 9 of the 12 piles treated with creosote-coal tar showed borer attack of varying degrees of severity. Only minor attack was noted on 2 of the 18 dual-treated piles. None of the Cooperative piles at Pearl Harbor was attacked by borers after 7 years but 33 of the 207 NCEL experimental piles showed attack by one or more Martesia after 3 1/2 to 6 years. Some were also attacked by Limnoria. The most severly attacked piles were those treated with CCA-Type B, chromated copper arsenate, by a commercial treater. (Author)

Descriptors :   (*MARINE ENGINEERING, SUPPORTS), (*MARINE BORERS, PEST CONTROL), PROTECTIVE TREATMENTS, CREOSOTE, COAL TAR, COPPER COMPOUNDS, ARSENIC COMPOUNDS, DAMAGE, IMPREGNATION, WOOD, MOLLUSCACIDES, PANAMA

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE