The cause of a blaze that wrecked a waste recycling centre is still unknown.
It has been more than a month since the fire broke out at the site in Wilson Avenue, Brighton.
Dozens of firefighters were needed to tackle the fire and smoke was seen from miles away at the height of the blaze.
Investigators from East Sussex Fire and Rescue Service spent several hours examining the scene but have been unable to pinpoint how it started.
The site is run by Veolia on behalf of Brighton and Hove City Council.
It reopened a few days after the fire with temporary bins installed to take paper, card, cans glass and textiles for recycling.
A spokeswoman for Veolia said it was still carrying out its own investigation into how the fire started.
She said: “A structural engineer has visited the site to assess the level of damage to the building and once we have been provided with his findings we will be able to progress the redevelopment of the site as soon as possible.”
It is the second time there has been a fire at the site.
In February 2006 the waste hall caught fire, causing hundreds of thousands of pounds damage.
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