Two rail trucks full of ballast were left dangling over a bridge crossing a river in Cambridgeshire after a train derailed during the night.
The rail line, mostly used by freight trains, was closed near Ely station but no-one was hurt.
Eleven of the EWS train’s 37 trucks fell on to their sides with two hanging over a bridge over the River Ouse.
One Railway services from Peterborough to London have been affected and an accident investigation is under way.
The bridge was damaged by the derailment so the River Ouse was shut to river traffic and a path was sealed off for safety reasons.
The train involved was travelling from Mountsorrel in Leicestershire to Chelmsford in Essex carrying aggregates.
Officials from the Rail Accident Investigation Branch (RAIB) are at the scene.
British Transport Police were liaising with the RAIB but were not carrying out any inquiries into the incident.
Engineers have been assigned to remove 11 derailed train carriages left hanging on a bridge over the River Great Ouse and work could take six months.
County and district Cllr Bill Hunt has called on the county council to put pressure on Network Rail to complete the work as quickly as possible and advise businesses on how they can file for compensation.
Cllr Hunt, who represents Haddenham on Cambridgeshire County Council and Stretham and Wilburton on the district council, said: “My concern is that there doesn’t seem to be any great sense of urgency. This is affecting businesses, tourism, people using their boats and fishermen. Footpaths have been closed and we need to put pressure on Network Rail.