Whakarongo attenuation pond and wetland

We've constructed a pond and wetland on James Line to enable the continued development of the Whakarongo residential area.

The pond provides flood storage for more than 500 lots of new development in the upper and lower terrace of Whakarongo, including Tamakuku Terrace. It’s designed to hold and treat stormwater before flowing into Whakapokapoka Lagoon and then into the Manawatū River. 

The pond is about 375 metres long, 60m wide and can hold more than 18 million litres of water at capacity (seven Olympic swimming pools). The total catchment area it serves is 64 hectares.

This pond promotes best practice stormwater management

Our stormwater modelling showed the best solution for the entire growth area was a central pond rather than a series of individual solutions by each landowner. The design will allow landowners to subdivide and develop their land at their own pace as there are confirmed discharge points and serviceability.

The pond meets the hydraulic neutrality requirement under the District Plan and allows Council to successfully meet the discharge consent requirements set by Horizons Regional Council.

We worked alongside iwi to develop a wetland

Rangitāne helped us to encourage biodiversity and attract birds and other wildlife by creating a wetland. This included planting thousands of native trees.