The most affected iwi, Ngāti Manuhiri and Ngāti Whātua, say the fight is far from over and they will appeal the decision to the Environment Court.
It is a balance between the cultural values iwi are fighting for and the clock that's ticking on existing Auckland tips.
The proposed 60-hectare dump would take four years to build and cover up about 14km of streams around the Hōteo River. Earthworks would cover more than 136 hectares and that would include building associated facilities, new roads and ponds.
Waste Management put forward a range of measures to mitigate environmental impacts such as planting 10 hectares of native plants and "enhancement and/or protection" of 15km of identified streams inside its holdings.
But Ngāti Manuhiri Settlement Trust acting chief executive Nicola MacDonald says that's not the point.
"Auckland Council needs to consider, is it proper, is it practice, to establish landfills that are adjacent to natural water sources?" she says.
"Just like ourselves as human beings, we have veins. Veins carry everything that we need, all our nutrients to all parts of the body ... there are little streams, little inlets that flow all around and into the Hōteo River. By closing these off, by damning these up, we suffocate the land."
MacDonald refers to the interconnectedness of the whenua, the land and Māori.
Environmental Defence Society chairman Gary Taylor, who has worked as a city and regional councillor, spoke of the history of landfills in Auckland and our need for more.
"There's something approaching two million tonnes of waste that goes to rubbish every year," he says. "The problem that we've got is that the time horizon is shortening."
Redvale Landfill currently takes about 50 per cent of Auckland's waste but is due to cease operations in 2028. Taylor says other tips in the area will be full shortly after.
"My advice to Waste Management would have been when they started on this journey, to have talked much earlier on in the piece to [iwi] ... you've got to talk to tangata whenua early on. You can't present them with, 'here's an application, tell us what you think' - that's not the way to go about it," Taylor says.