He said while he supported a "user pays" system, a differential roading rate would be extremely difficult to administer.
"It's riddled with complications.
"With forestry you only harvest once every 30 years whereas with a milk tanker its travelling every day and sometimes twice a day."
Rates for the coming year in Whangarei would be finalised under the Annual Plan, currently under consideration by councillors, though no major changes were expected from the status quo set in the council's 2015-2015 Long Term Plan.
Mr Blackwell submitted on the plan, though his submission focused mainly on the rates increases some dairy farmers faced in a time of hardship for the industry and did not address the roading differential idea.
However, Northland DHB medical officer of health Clair Mills did submit in favour of a targeted "forestry roading rate", to address the road damage and dust. Dr Mills' submission was sparked primarily by health concerns for residents living on dusty unsealed roads.
"This [rate would be] in line with the 'polluters should pay' principle affirmed by the Public Health Association of New Zealand," she said.
As part of their deliberations, councillors will grapple with what to do about a group of residents at Wright and McCardle roads in Pipiwai, now armed with evidence showing the dust levels on their roads were in fact illegal and in breach of the National Environmental Standards for Air Quality.