We are continuously assessing a wide range of environmental factors and adapting dredging operations in response, to ensure environmental effects are minimised. Our environmental monitoring programme is the most extensive ever undertaken for a dredge project in New Zealand. Our instruments continuously measure the amount of sediment in the water to ensure it remains within acceptable levels set by the consent. It was found any environmental effects would be minimal and short term as the ecosystem is used to naturally occurring fluctuations in water clarity. The environmental effects of the plumes were evaluated during the consent process. These looked like a trail of cloudy patches in the water behind the dredge. ![]() The most obvious environmental change people may have noticed were sediment plumes behind the dredge vessel.
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