Ventilation device installed 2000m up Pike River mine drift 27 Jan, 2021 01:22 AM 2 minutes to read Pike River Recovery Agency workers installing the ventilation control device more than 2000m up the drift. Photo / Supplied Digital producer, Christchurch, NZ Heralddevon.bolger@nzme.co.nz A ventilation control device has been installed in the Pike River mine which means fresh air can circulate more than 2000m up the drift. A post on social media by the Pike River Recovery Agency said the device, VCD2, was installed on Tuesday. It is sitting about 2224m up the drift and acts as a wall with an airlock.