Balfour Beatty has completed the first section of the £63M Rossall sea defence scheme for client Wyre Council.
Specially manufactured precast concrete and 270,000 tonnes of rock has been used to create the defence, which will protect 7,500 properties.
The precast concrete is being used to construct a stepped revetment to break the waves.
Balfour Beatty regional managing director Mark Farrah said: “This milestone marks a significant step in the development of the Rossall flood and coastal defence scheme. Once complete, together with the Anchorsholme coastal project, this will be the largest flood prevention scheme in the UK and will protect 12,500 residents from the risk of flooding.”
It will be completed this winter.