the confrontation revived in summer 1977. over the pentecost weekend around 3000 opponents a day participated to a protest march towards the plant construction site. on 25 june 1977 2000-3000 activists tried to occupy the accesses to the kkg and had to be dispersed by the police. the same scuffles took place two weeks later between 6000 demonstrators and 1000 policemen. still the plant got the authorization to start operation in 1979. the continual strong opposition to the kkg induced the federal authorities in 1980 to call a hearing about the plant safety. they concluded that the plant satisfied all legal requirements and could continue operation. in april 1981 the last formal oppositions were rejected by the federal council, putting an end to a decade of intense confrontation.