Hi, I assume you mean "Water Bodys"

the LINZ Aerial imagery is unfortunately 3-10 years old depending on the part of NZ. "Maxar Premium Imagery" is available in the iD editor on openstreetmap.org and is much more up to date (circa July 2020). That imagery shows some sort of detention basin here so I think everything is okay here ? feel free to re-open this note 