Bo’ness Road is to remain shut for another five months after INEOS in Grangemouth confirmed it applied for an extension.
The A904 road, at the junction with Inchyra Road and Wholeflats Road, has already been closed for five months and the petrochemical giant has asked Falkirk Council for it to remain so until March 2016.
During the current period of closure, INEOS state it has successfully undertaken survey work and inspections which have enabled the company to move forward with its complex £300 million ethane supply project.
Originally the new pipes were to go under the road, but the pipework connecting the storage tank to the manufacturing plant will now be routed over the road instead.
The company has had permission from Falkirk Council to build a pipebridge.
Councillor Craig Martin, spokesman for the road team, said: “The council could not refuse the request, but we have put tough conditions on the closure.
“We want to see the work completed as soon as possible so the council will visit the site to keep track of how quickly the work is being done. We also granted the company only five months closure, not six.”