Norfolk says the wetland has taken two years to complete and required the excavation of more than 396,000 tonnes of earth.
He says the creation of the wetland with this degree of complex geometry would not have been possible within this timeframe without advancements in 3D modelling technology and integrated guidance systems for excavators.
“Bringing this design to life in a relatively short space of time required the latest in sophisticated 3D modelling and construction techniques – which are used to guide the excavators via GPS,” he says.
Stephen Hughes, Drury South Crossing CEO, says a number of environmental considerations have been integrated into the new subdivision and include removing pollutants such as zinc, the most common of all heavy metal contaminants in urban rivers and streams, from roofing materials used on site.
“In the past, residential lawns and grass around houses would have helped contribute to capturing sediment from stormwater runoff. However, modern subdivisions tend to have less lawn which increases the need to capture runoff from surrounding roads and housing.
“While filtering stormwater and runoff is a key aspect of protecting our urban waterways, we have gone a step further by preventing unpainted roofing materials made with zinc from being used at the subdivision.
“The creation of this new wetland and public recreational area is designed to set a new standard for residential and industrial developments in the Auckland region,” he says.