Storms over the past week have also led to the flushing of Lake Roxburgh to try to move sediment down river.
Contact Energy Clutha River head of hydro generation Boyd Brinsdon said the logs coming down the river had been caught by a log safety boom behind the dam.
When all the logs were gathered together they would be moved slightly downstream and moved on to land.
Usually the logs would then be taken away and mulched, but Mr Brinsdon said in the past the logs had been left and people had picked them up and used them for firewood.
That was the plan again this time.
Mr Brinsdon said there were quite a lot of logs piling up, probably on a par with an event in December 2019 when heavy rain fell in the catchment.
The electricity company was also looking at cleaning up other areas including Old Cromwell Town, which would bring more logs down the river.
The high flows, which peaked at 1800cumecs at Roxburgh Dam, allowed the company to put in place its flushing regime.
Flushing is where the lake level is lowered during a flood and the power of the current moves sediment downstream through the lake.
Sediment has been trapped behind the Roxburgh Dam since it was built in the 1950s.
When Alexandra flooded in the late 1990s, the blame was laid on the inability of the increased levels of water to get through Lake Roxburgh, as it was clogged by sediment.
Contact Energy in its consents is allowed to lower the lake to allow the flushing.
Mr Brinsdon confirmed Lake Roxburgh was dropped by 5m to push sediment downriver.
It was hoped sediment in the Narrows area, which is just past Alexandra, would be transported down the river past Roxburgh Dam.
A survey on the sediment buildup in the gorge — which was carried out every five years — would judge how successful the flushing was.
Mr Brinsdon said not as much rain came through at the weekend as predicted and Lake Roxburgh had returned to its normal range.
The rain had also been a boost for Lake Hawea, which had bounced back after looking very low a few weeks ago.
