A barge was usually stationed at Ōpua but it was in Auckland for work related to the coming America's Cup.
As a result another barge had to come up from Auckland, a journey that was delayed by bad weather.
Sunday's conditions finally allowed a recovery operation involving the barge, a tugboat, a crane and a team of divers.
The Northland Regional Council issued a navigation warning on Sunday and kept the area clear of boats taking part in a club race.
Sam Peate of Auckland-based Entrada Travel Group, the parent company of Fullers GreatSights, said the ramp detached from the ferry on July 26 during a pre-service run and no passengers or vehicles were on board.
''Fullers GreatSights takes this incident very seriously and a full investigation is currently underway so that we can ensure that an event such as this does not reoccur. The vessel is currently in Whangārei undergoing repair and will be back into operation shortly,'' he said.
Fullers GreatSights normally has two ferries operating on the Ōpua-Ōkiato crossing so an old car ferry was brought back into action while Arawhiti was tied up at the wharf for two weeks.
The Maritime Safety Authority has been notified.