A revived East-West Link (EWL) could mean trouble for a rare wildlife haven and set a "terrible precedent" for Auckland, an environment group fears.
The EWL was a $1.85b priority roading project of the previous government, connecting SH20 at Onehunga and SH1 at Mt Wellington with a four-lane highway.
In November, when it was still in the design phase, Prime Minister Jacinda Ardern met with Auckland Mayor Phil Goff and announced the road would not go ahead in its current form.
However, an independent board of inquiry last week issued its final decision confirming the designations and granting the resource consents for the project, two months after the Environmental Protection Authority released its draft decision on the project.
Sally Gepp, a solicitor for Forest and Bird, said the decision to grant consent for the road went against policies to protect the environment in the Auckland Unitary Plan (AUP).