On 14 November 1996, four men died at Gretley Colliery in New South Wales. They were driving a heading toward what the mine plan showed as old, water-filled workings of the abandoned Young Wallsend Colliery, more than 100 metres away. The workings were about 8 metres away. The continuous miner holed into them and the heading flooded.
The judicial inquiry's finding was not that the men made a mistake. It was that the plan was wrong, and that the operator, the surveyor and the regulator had all failed to confirm its accuracy. A drawing put four men in the wrong place. That is the sharpest version of a problem running through every Australian mine: the value of a drawing is the trust you can place in it, and that trust depends on whether the right, current version can be found and read at all.
When the plan is wrong, people are in the wrong place
The NSW Resources Regulator's account of Gretley records inaccuracies between 100 and 200 metres in the plan of the old workings. The inquiry under Acting Judge Staunton found the Department of Mineral Resources, the mine operator and the mine surveyor all failed to confirm the accuracy of the plan and identify the errors in the old workings.
New South Wales codified the lesson. The Inundation and Inrush Hazard Management Code of Practice (approved under the WHS Act, February 2015) requires a principal hazard management plan to consider the accuracy of plans of other workings, lists the typical errors found in mine plans, and carries one blunt instruction on its hazard-identification flow chart. The Code names the Gretley inquiry directly.
“Old information is not reliable.”
Quecreek, Pennsylvania, in 2002 is the same failure in another country: nine miners were trapped, then all rescued, after a heading broke into a flooded adjacent mine that an undated and uncertified map failed to show in full. Inaccurate maps then hampered the rescuers in locating the men. The pattern is not Australian, but Australia's law is built around preventing it.
What Australian law actually requires of a drawing
Mine safety in Australia is not regulated by one national instrument. Western Australia, New South Wales and Queensland each impose statutory duties to prepare, certify, version, retain and surrender accurate plans and records. The detail differs; the spine is identical.
| Jurisdiction | Key instrument | What it requires of drawings & records |
|---|---|---|
| Western Australia | WHS (Mines) Regulations 2022 | An accurate, up-to-date, certified survey plan (reg 675S / 675TA); keep the current plan and all previous versions (675U); provide an accurate plan before closure (675UB); a mine record kept 7 years with a tamper offence (675Y/Z); documented Principal Mining Hazard Management Plans (628). |
| New South Wales | WHS (Mines & Petroleum Sites) Regulation 2022 | A certified survey plan (s117), reviewed at least every 12 months and revised if inaccurate (s118); keep current and all prior versions, secure the survey data, surrender a plan of a closed mine (s119–121); records kept 7 years (s130); Principal Control Plans must be documented (s30). |
| Queensland (coal) | Coal Mining Safety & Health Act 1999 + Reg 2017 | Certified plans of workings, produced to the chief inspector before 31 December each year (Act s67); abandonment plans within 14 days (s67(4)); a mine record kept at least 7 years with a tamper offence (s68); plans must correlate workings including abandoned workings (Reg s61). |
Two things sit underneath the table. First, seven years is the floor, not the ceiling; health and exposure-monitoring records run far longer (Queensland's CMSH Regulation s53 sets 30 years; WA reaches 30–40 years for some monitoring records).
Second, the regulator audits the documentation itself: the NSW Resources Regulator's assessment programs assess the documentation and implementation of critical controls and report back to the operator, and inspector records become part of the statutory mine record (WA reg 675ZA; QLD Act s68). A drawing that cannot be produced, in the right revision, is not a filing inconvenience. It is a compliance gap on a record the regulator is entitled to inspect.
