Force 11 gales cause damage at the port
Violent storms on Wearside left a trail of damage at Sunderland Port in 1991.
Port authorities are trying to work out the cost of repairing damage to lock gates, two grain warehouses which are listed buildings, and Roker Pier.
Roker Pier suffered considerable damage above the water line but because of sea conditions it has not been possible for divers to inspect the foundations and those of the new South Piers.
The handrail was severely damaged, forcing Roker Pier to be closed to the public until it is replaced.
About 70 metres of coping stone were also washed away and parts of the concrete decking were damaged.
Damage to lock gates meant vessels could not be locked in or out of South Docks and repairs were done urgently. Areas around the warehouses have been fenced off to protect people from falling debris.