A HISTORIC viaduct is to undergo major changes as part of £1 billion modernisation works to speed up rail travel.

The 183-metre long structure in Newton-le-Willows, commonly known as the Nine Arches Bridge, is said to be the first major crossing of its kind, built by George Stephenson between 1828 and 1830.

And the bridge, built to let trains cross above the Sankey Canal, has international significance as the world’s earliest major railway viaduct still in use.

English Heritage, which named it a Grade I listed building, has worked with Network Rail on the planned electrification of the bridge to meet the needs of modern-day rail users.

The work will include the installation of overhead line equipment.

A spokesman for Network Rail said: “We have worked with English Heritage regarding the installation of the electrification equipment on one of the oldest railway viaducts in the world as well as having discussions with local authorities.

“This work is part of investment totalling more than £1bn in the railway in the north west of England which will provide a better railway for passengers with faster, quieter and more reliable trains. The work is due to be completed by early 2015.”

Meanwhile, a spokesperson for English Heritage confirmed it has been in touch with St Helens Council over plans to remove graffiti from the bridge.

The group says the writing detracts from the aesthetic appearance of one of the borough’s most significant structures.