Balfour Beatty is working to repair damage to a sea wall near Blackpool.
Part of the coastal walkway has been closed off in Anchorsholme while the contractor solves the problem.
Balfour is carrying out an £86M coastal defence project for a coalition of councils in the North West and United Utilities.
The scheme involves building 2km of coastal defence from Rossall Hospital to Rossall Point along with 1km of sea wall in Anchorsholme, from Kingsway to Little Bispham.
Balfour Beatty said in a statement: “Progress on the Fylde Peninsular Coastal Programme has been impacted by severe coastal storms and abnormally high tides in recent months with the concrete blinding and stone foundations in part of the Anchorsholme section being temporarily affected.
“Safety is of paramount importance to us and the area affected has been secured so that the public can’t access it.
“We are working to rectify the damage which has occurred as quickly as possible and we will continue to work closely with our partner on the Fylde Peninsular Partnership, Blackpool Council, to complete the scheme by Autumn 2015.”