| Project Description | WNP Wharekirauponga Underground Mine - Assessment of Effects of Discharges to Air | 4397169-66885702-23 | | 19 The portals will be securely sealed, and the immediate entrance area backfilled with rock prior to placement of topsoil and establishment of pasture. All rock will be returned underground. The area of the rock stack will be rehabilitated with topsoil and plantings to return the area to its original landform and use for arable farming, with riparian areas reestablished and protected from stock. 2.10.2 Ventilation shafts All fencing and vent/egress surface infrastructure (vent chimneys) will be removed. Ventilation shafts will be filled in and surface areas around the raises revegetated. The site rehabilitation process will be the same as that endorsed by DoC and already employed elsewhere by OGNZL.
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