The Mining Remediation Authority was called after the surface hazard, about 4 metres in diameter and 3 metres deep, was discovered in May.
The site was made safe, with fences and signage, and a search of our records suggested the collapse was over a shallow roadway leading from a historical mine entry to the abandoned Strathfield colliery.
Excavating and filling the collapse.
Rob Pilmore, our project manager who worked on a permanent solution, said
Our ground investigation works – carried out in August to give time for the grass in the rest of the field to grow and for the farmer to cut it for silage – confirmed the position of an old roadway that had collapsed at this location.
The area was excavated and large stone pushed into the roadway in both directions, before the void was also filled.
The excavation was then backfilled, with a layer of geotextile fabric and polypropylene mesh laid about one metre below ground level, before the field was reinstated and seeded.
Installation of geotextile repair complete and area ready for reinstatement.
As part of our work to keep people safe and provide peace of mind, in the past financial year we investigated and assessed 1,000 mining hazards, subsidence claims and emergency calls.
You can report a coal mining hazard to us, 24 hours a day, 7 days a week, by calling 0800 288 4242.
After the safety works the field was reinstated and seeded.
