The Cardiff Mine is a minor part only of the geological unit including both the Jubilee and Cardiff Mines, and has the same characteristics, except that it is more than 100 times in area, and has a far more extreme history of flooding, roof faulting and landslip.
I refer you to the provisions of the Forest Safety Code (Tasmania) 2000, the Workplace Health and Safety Act 1995 and the Workplace Health and Safety regulations 1998 rr 17, 18, 19, and assert that Forestry Tasmania has failed to identify this hazard in the workplace, has failed to assess the risks associated with the hazard, and has failed to take appropriate measures to control that risk, as it is required to do.
In the circumstances, Forestry Tasmania would be failing in its Duty of Care, be in breach of the Code, Act and Regulations, and be negligent if it undertakes forest operations, including roading, on this coupe before resolving this issue.