Wellington Council Technical Services director Stan Robb said the work on both side tracks would be completed by early November.

"The sidetrack for the Gundy bridge will be on the northern side of the existing bridge and a S bend will be created to slow traffic there," Mr Robb said.

"Heavy vehicles over the 10 tonne limit will be diverted on the Bournewood intersection near Yeoval.

"The diversion will only add about six kilometres to the trip.

"We are assessing the road and workers are cutting trees which may be overhanging.

"The Bournewood Road intersection will take drivers through to Curra Creek Road and eventually to Wellington," Mr Robb said.

At Dripstone the side track will be on the eastern side.

"We have the materials, approvals and we hope to complete side tracks, weather permitting, by November but it could be earlier," Mr Robb said.

The side tracks were approved at the last council meeting and are budgeted at $500,000.

Mr Robb said the council was also making application with both federal and state governments for the building of new bridges at Dripstone and Gundy.

Options are being investigated into whether these will be prefabricated or made on site.

The contractor who wins the eventual tender and has expertise in the field would build both bridges and design to Wellington Council specifications.

The general manager of Wellington council and the mayor are in discussions with the federal member for Parkes Mark Coulton and state member for Orange and relevant ministers from both Federal and state governments.

The full cost of the two new bridges is about $4million.

The bridges are decaying and are failing infrastructure and the technicalservices director says council has moved with urgency to fix the immediate problem