Firefighters finally left the scene of a huge fire at the former Stanton Ironworks, which had burned for nine days, on Tuesday.
At its height, 60 firefighters from stations across Derbyshire and Nottinghamshire were tackling the blaze.
Last Thursday operations were scaled down and Low’s Lane was re-opened, having been closed to all traffic since the fire started on Saturday September 15.
The run-off from the fire had been badly affecting oxygen levels in the Erewash Canal, where residents had reported seeing dead fish floating on the surface.
The Environment Agency this week said they had rescued 100,000 fish from the affected parts of the canal by sending electric charges through the water to stun them and then scooping them out.
Hydrogen peroxide was added to the river to increase oxygen levels.
Paul Reeves from the Environment Agency said the canal may experience low oxygen levels for a few more days.
“If you see fish in distress please let us know,” he said.
The fire at a recycling facility off Low’s Lane, involved between 7,000 and 8,000 tonnes of wood.
Smoke caused problems throughout the week for neighbours, who were asked to keep windows and doors shut, and warnings were issued to drivers on the M1.
A fire service spokesman said they will be periodically visiting the scene of the fire and monitoring the remaining pile of recycled wood pulp, which is still smouldering and may do for some considerable time.
It is still not know what caused the blaze, and it is thought an investigation will start soon, now the fire is out.
Last week, station manager Gary Platts said arson was likely but that the cause may never be known because the fire will probably have destroyed any evidence of its origins.