The Kaipara District Council has decided not to take legal action against consultants who managed the controversial $63 million Mangawhai sewerage scheme.
Beca Carter Hollings and Ferner managed the project that divided the community in Kaipara and prompted Auditor-General Lyn Provost to apologise for poor work done by the Audit Office when scrutinising the council books.
John Robertson, chairman of commissioners at the council, said the cost of pursuing a claim against Beca Carter with a limited chance of success was not a productive use of ratepayers' funds.
He said the decision not to take legal action was also made because of the Limitation Act issues, and significant costs and risks that would be associated with initiating a dispute resolution process.
Mr Robertson said the council had received and considered legal advice before making its decision at a meeting on February 24, 2015.