You Know The Drill is a termly newsletter that has been established by IDC. It is aiming to animate the dialogue between IDC and its partners and clients.

The worlds most amazing and biggest mine holes


Mirny Mine is an inactive diamond mine in Mirny, Eastern Siberia. It is the largest open diamond mine in the world and the second largest excavated hole in the world. It is 525 meters (1,722 ft) deep and has a diameter of 1,200 m (3,900 ft). The airspace above the mine is closed for helicopters because of incidents in which they were sucked in by the downward air flow!https://bit.ly/2WY8MjM

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