Highways Agency

The Project

Tolvaddon Bridge forms part of the A30 trunk road as it crosses the A3047 near Camborne.

In 2004, during our routine inspections, we found that the concrete and its reinforcing steel in the bridge decks were showing evidence of deterioration. Some of the tensioning cables were corroded, and the concrete contaminated. Further studies resulted in the conclusion that the only cost effective solution would be to replace the decks.

We will replace the two bridge decks of Tolvaddon Interchange whilst maintaining 2 lanes of traffic in each direction on the A30 apart from short periods of traffic management.

This will be achieved by constructing a temporary bridge alongside the ones to be replaced, and diverting traffic over it whilst the A30 bridges are demolished and rebuilt one by one.

The safety barriers will also be upgraded to the latest standards during this scheme.

We will be taking the opportunity to undertake some repairs to Blowinghouse and Gilberts Coombe Viaducts, which also form part of the A30 near Redruth. These structures will receive treatment to avoid similar corrosion occurring in the ducts which carry the tensioning cables.

Work has now started and is due to be completed by winter 2008.

As at Easter 2008, work is well under way with the construction of the new westbound bridge deck following the demolition of the old one.

To find out about updates for this scheme please follow the 'Update' link from the right hand navigation menu.

Traffic Management

The A30 lane widths will be reduced in the vicinity of Tolvaddon Bridge.

During the course of the works on Blowinghouse and Gilberts Coombe Viaducts, a contraflow will be in force in the first quarter of 2008, but this period will be kept to a minimum by 24/7 working.

There will be a 50mph speed limit for the duration of the project, and this will be enforced.

Any traffic management will be well publicised in the local media, and by advanced warning signs on the road.

Public Exhibition – 23 October 2007

The public exhibition to display the work involved in replacing the bridge decks and how it might affect the local community has taken place and involved representatives of the Highways Agency, their consultants and contractors who met with members of the public to address any queries.