NOISE SHIELD SECTION

AIR IMPEDANCEGAP

CARBON STEELINNER PIPE

CARBON STEELOUTER PIPE

BUBBLECURTAIN

AIRBUBBLES

PILE

DROP GATE ASSEMBLYDROP GATE ASSEMBLY

NOISE SHIELDNOISE SHIELD

PILE PILE

AIR PIPE

PILE GATE

WATER LEVEL

SEA BED

A modified piling gate, incorporating innovative best practice air impedance gap and air bubbles, will be used during pile driving to significantly reduce underwater noise transmission.This has been modelled by underwater noise specialists and reduces any behavioural and physical impacts to marine mammals to less than 200m, well within the 1km marine exclusion zone.

Marine piling gate

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MarineGranite Island Causeway Project

DIT.gicauseway@sa.gov.au1300 794 880