Pinchbeck’s Enterprise Way is set to be closed for longer.
It was shut in May as a long running issue with a sinkhole returned.
Lincolnshire County Council had hoped to have the road open by June 26, then put that back to ‘mid-July’ after setbacks.
Now the authority has said Anglian Water won’t finish work on it until Wednesday (July 22) when it will have to resurface the road.
A spokesman for LCC said: “After extensive investigations it was found that a number of assets within the road were damaged, including the surface water drainage system and the sewer.
“Anglian Water has been on site for several days and has now successfully completed the repair works which has included patch lining the damaged sewer.
“AW is now in the process of backfilling the excavation and removing equipment – a more complex operation than usual as no fewer than 17 utility services are sited within the excavation itself.
“The plans are that Anglian Water will hand the site back to LCC this Wednesday. Once that happens, we will complete the final reinstatement, kerbing and footway works as quickly as we can.”
The county council says it is working with Anglian Water and has carried out ‘extensive drainage investigations on the road, and across a much wider area than before, in a bid to finally solve the persistent road issues in Pinchbeck’.
“By taking in a much larger area to investigate all drainage, utilities, underground settling and other factors, crews have now been able to identify several elements within the surrounding drainage systems that help explain why the problem has been so persistent,” the spokesman said. “These findings are now guiding the work on site.”
Ashley Behan, traffic manager at Lincolnshire County Council, said: “We know how disruptive this closure is for residents, businesses and those travelling through the area, and I’d like to thank everyone for their continued patience.
“We will continue to do everything we can to complete the works as quickly as possible, while making sure they are done right.
“Local businesses remain open as usual, and I’d encourage road users to allow extra time for journeys in and around the area whilst these works are ongoing.”