Once instructed by the government to determine if re-entry of the Pike River drift was feasible and safe, SENZ (Solid Energy New Zealand) initiated a detailed investigation, design and risk assessment exercise. The senior engineers subsequently announced a plan which they considered met the government criterion for proceeding which they were executing until the Board of SENZ instructed a cessation. The NZ Chief Inspector of Mines also considered the SENZ plan safe and feasible. Click here for more on the re-entry plan.
Thanks for the share, PMJ!