Garden furniture, solar panels and children's toys are being recovered from Lake Mulwala after last week's tornado.
Crews from Goulburn Murray Water have been working to remove debris from the waterway ahead of Easter.
The dam's operations coordinator, Tony Beamish, says a navigation warning for Lake Mulwala remains in place.
He says boat operators need to take extra care.
"New South Wales Roads and Maritime Service have issued a navigation warning to all people entering the water and visitors to Lake Mulwala just to be careful of the debris that may still be lodged around the lake," he said.
"It's going to take some time to recover everything, we are still working on sections of the lake."
He says items being pulled from the lake are very unusual.
"Probably some of the things we weren't expecting are solar panels off roofs ... something that [we] have not come across in the past, fairly new to our environment," he said.
Meanwhile, the State Emergency Service (SES) is urging drivers in tornado affected parts of the north-east to be careful where they pull over to look at the damage.
The SES says a number of drivers have been taking risks by stopping too close to other traffic and getting out of their vehicles to take pictures.
Spokesman Lachlan Quick says roads are very busy during the Easter long weekend but in areas damaged by last week's storm it is more of a concern.
He says falling trees pose the biggest threat.
"There will be the chance of damaged trees and extra debris lying around in that area, especially along the river [at] Bundalong, certainly across to Cobram and Yarrawonga," he said.
"We are a little concerned about people driving around to have a look at things, we probably urge people to understand that this is someone's home and many of them will still be going through a traumatic time there."
© ABC 2013
17:27 EST Wallsend businesses have welcomed the introduction of a Flash Flood Early Warning system, but say it will not protect their properties from water inundation.