Ground for the receiving stations at Pleumeur-Boudou was first broken in October of 1961. Just to prepare the ground, 3000 charges were laid, and 3000 cubic metres of rock were removed. To lay the foundation required 4000 cubic metres of concrete poured over a framework of 276 tonnes of steel. The final construction phase mobilized up to 1250 people. Workers, technicians and engineers took turns on the site, 24 hours a day. Day and night, police and security guards patrol the site. The massive surveillance apparatus also set the local population to talking. Rumours flew of it being a secret base, or perhaps even for launching rockets.
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