QLDC chief engineer Ulrich Glasner said the council also intended to address stormwater overflowing from the Alpha Series subdivision into Bullock Creek, and flooding issues after heavy rain in Anderson and Aubrey Rds and Bills Way.
In a statement yesterday, QLDC said it had had "positive preliminary discussions" with the Otago Fish & Game Council about the proposed new stormwater catchment solution and wetland area.
The Otago Daily Times has asked QLDC if the proposed wetland area is near the Wanaka Showgrounds.
Stormwater and sediment levels entering Bullock Creek had long been a concern for many in Wanaka, including the Friends of Bullock Creek, and Otago Fish & Game, QLDC said.
At a meeting between QLDC and Otago Fish & Game, the concept had been raised of taking wider catchment stormwater and surplus storm-event water from the Alpha Ridge development to the lake through a proposed wetland in the Stone St area.
Mr Glasner said after a recent review of the Alpha Ridge stormwater solution, the developer had agreed to work with the council on a new solution, and through that the proposal had emerged.
"The concept will aim to deliver clear water into the lake while continuing to retain sediment and protect pre-development flows into Bullock Creek."
Friends of Bullock Creek secretary Roger Gardiner yesterday cautiously welcomed the QLDC announcement, but wanted more detail, including who would be paying for and maintaining the wetland.
Otago Fish & Game Council chief executive Ian Hadland said discussions were at an early stage and there would be no agreement to use Fish & Game land until there was "certainty that what is proposed will protect Bullock Creek and the community from the discharge of sediment and nutrients contained in stormwater flows".
The council will bring together chief stakeholders and provide more details on design and location next month.
