There is no updated business case for the Ruataniwha dam, despite Deloitte presenting a peer review of it at today's Hawke's Bay Regional Council meeting.
The lack of a report was revealed in a series of emails in which councillors requested a copy of the updated plan so they could discuss it in chambers.
Recommendations contained within a council agenda released in 2014 show a final review from Deloitte will be required when the final RWSS business plan had been finalised by HBRIC.
Councillor Tom Belford said such a report was promised almost two years ago.
He said it was not acceptable that Deloitte were able to peek "behind the curtains" but councillors were not.