Burnie Port's wharf buckling at berth seven while loading a ship earlier this month is being portrayed by Labor as a sign of a failure to maintain the structure.
Opposition Braddon MP Shane Broad claims the port is yet to return to full capacity.
State Growth Minister Michael Ferguson's retaliated in parliament.
"I do thoroughly reject Dr Broad's claim against TasPorts they are not maintaining their infrastructure, that is an unfortunate incident and managed professionally and competently and I ask Dr Broad again to cease his ttacks on the good people at TasPorts, he has made a habit of it."
A statement in response by Minister Ferguson also reiterates the investment under Tasmania's Ports Master Plan released in 2018.
"TasPorts committed to investing at least $80 million at the Port of Burnie to deliver a significant increase in capacity at Tasmania’s primary container port.
Key projects that have already been completed include significant capital dredging to support the arrival of Toll’s new state-of-the-art vessels. Further dredging work is scheduled in future years to enable access for larger vessels.
Dr Broad has still failed to withdraw his proven false claims regarding staffing numbers, which was his earlier anti-TasPorts tirade."