A playing field in Redruth is expected to be out of action for at least the first half of the football season while work is carried out on areas of subsidence.
The subsidence was first reported to Cornwal Council last winter when several shallow depressions appeared on the Clijah Croft sports fields.
The council fenced off the areas pending a mining study and drilling investigation, which showed that the subsidence were more significant than expected and that there were additional areas of concern elsewhere in the playing fields.
There are 10 small areas fenced off for the public’s safety and they are being monitored regularly until a permanent solution is found.
Cornwall Council cabinet member for environment and public protection Sue James said: “We are working with Cormac to make the Clijah Croft site safe and fully usable again, and we apologise for any inconvenience while the pitch is out of action.
“There are some further tests to be carried out, but it is likely that extensive works will be needed. It will take some time to design the works and we will provide updates about the works when we have more information.”