Work began this week to protect homes in Grantham at risk of flooding.
The Environment Agency started work in Witham Place on Monday to repair a flood defence and it is expected to take eight weeks to complete.
Adrian Clack, asset performance team leader, said: “It is necessary to repair damage to the wall which has been caused over the years by tree roots and make sure the risk of flooding to nearby homes continues to be reduced.
“Our works are taking place close to people’s homes and we will keep disruption to a minimum but hopefully they will understand that it is vital that we carry them out.”
The works will include removing and replacing the bricks which cap the wall along its entire length. Damaged bricks will also be replaced.
Two Swedish Whitebeam trees will also be felled and replaced with native species. The footpath will then be raised in two places to increase the cover over tree roots and reduce the risk of further damage to the wall in the future.
The footpath will be diverted through Witham Place while the works are being carried out, between the hours of 8am and 6pm.