Butterley Viaduct repairs to start
A £450,000 project to repair a viaduct in a Derbyshire town is to begin on Wednesday.
Bearings on the Butterley Viaduct, which carries the A610 into Ripley, are beginning to wear out and need replacing.
Graham Hollet, bridge engineer at Derbyshire County Council, said the bearings, which support between 50 to 80 tonnes each, have a finite life.
Work is expected to take 20 weeks with some overnight closures.
"The bearings are nearly 30 years old," said Mr Hollet. "They are deteriorating and not allowing the bridge to move as it was designed to.
"If we leave them unchecked, it would set up unacceptable stresses on that bridge which would lead to very expensive repairs and would put the structure at risk."
The viaduct, which stretches about 100m (328ft), was built in the early 1980s and has about 100 bearings.
Temporary structures will be built to support the bridge's load, to allow repairs to the bearings to be carried out.