Plans to dump china clay waste on the outskirts of St Austell have been condemned by a leading councillor.
Imerys says no better site for waste has been found
Clay company Imerys wants to dump waste on a 250 acre site on the Gover valley, north west of the town.
Opponents say that valuable ancient farmland, woods, a stream and fauna and flora could be lost.
Restormel Council leader Councillor Joan Vincent says it would be a mistake, but Imerys says no better site has been found.
Councillor Vincent said: "I was horrified when I heard they were considering tipping here.
"It is a very beautiful area. So much has already been destroyed and we have to be extremely careful about what is granted in the future."
Imerys spokesman Ivor Bowditch said: "We have had detailed discussions with the county council over tipping options.
"This site is not without issues that I fully accept, but an environmental impact assessment has been carried out."