Engineers are trying to find out what has caused a busy road in Spalding to subside over the last two weeks.
Diversions have been in place along Pinchbeck Road while a team from Anglian Water investigate a severe dent in the road surface.
The latest problem comes just weeks after work lasting three months to repair a collapsed sewer which caused potholes to appear in Winsover Road and Hawthorn Bank.
An Anglian Water spokesman said: “At the moment, we are doing some investigatory work to find out the cause of the subsidence.
“We are really sorry for the disruption caused to drivers but we are checking our infrastructure and other services underneath the road to find out what has taken place.”
Meanwhile, work has started today (Monday) on installing new manhole covers and chambers to reduce the risk of flooding in Spalding.
We will be installing two new manholes along Fairfield Way so that when it rains, they will reduce the risk of flooding for local residentsAn Anglian Water spokesman
Anglian Water is upgrading drainage in Fairview Way, off Woolram Wygate, where residents have been affected by flooding in the past and the new manholes will increase the capacity of the sewer during heavy rainfall.
The spokesman said: “This part of Spalding has suffered from flooding when it has rained heavily and Anglian Water engineers have designed a solution to help reduce the risk of this type of flooding in the future.
“We will be installing two new manholes along Fairfield Way so that when it rains, they will reduce the risk of flooding for local residents.”
“Responsibility for the drainage is very complex and sits with many different organisations, including Anglian Water, Lincolnshire County Council, South Holland District Council and The Environment Agency, as well as private landowners.
“Each party has responsibility for part of the drainage network which is a huge spider’s web of pipes, pumps, watercourses, streams and drainage points that are all interconnected.”
Fairview Way itself will be closed from now until Friday, April 21, to make sure that Anglian Water staff and customers are kept safe whilst the new manholes are installed.
A diversion route will be in place throughout the duration of the work and the spokesman said: “Of course we know that whenever we invest in our network and carry out work, it is disruptive because our pipes and sewers are buried deep underground.
“However, we will do all we can to keep disruption to a minimum and complete the job as swiftly as possible.”