Ylimäki quarries with more than 30 years of experience 7.11.2018 Markku Viitanen sits in the cab of the drill rig, wearing protectors on his ears and expertly operating the joystick. An echo sounds out from the surrounding forest as Robit’s drill bit is hammered into the rock. It’s a typical day at the office for Markku. And the quarry, located in Karstula, central Finland, is a typical work site for Markku’s employer, Louhintaliike Ylimäki. This is Markku’s third day of drilling at the quarry. Red borehole plugs in the snow mark the holes that have already been drilled. The 83-millimetre bore holes are being drilled to a depth of 10–12 metres, down to the bottom level of the quarry. Half of the roughly 1,600 metres to be drilled has already been completed. As a quarrying site, this one is

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