In April 2023, the Mining Remediation Authority was notified of a ground collapse at the Solvay Banks public park and play area in Southsea, Wrexham, at the location of an old mine shaft.

The area was immediately secured with fencing while we investigated the situation. In May we filled the shaft, measured to be more than 110 metres deep, with around 650 tonnes of material to stabilise the area and prevent further ground collapse. 

James Walker, project manager for our public safety and subsidence team, said:

The safety of the public is our paramount concern, and we acted swiftly to secure the collapsed shaft at Solvay Banks Park.

Our initial investigations identified the presence of a further 2 mine shafts in the vicinity, and historical records indicated that all 3 shafts had previously undergone treatment by the local authority in the 1970s. 

The locations of the other 2 mine shafts in the area were checked as a precautionary measure and no issues were found.

Ground investigation and surveying works identified that the existing mine shaft cap was in better condition than initially anticipated but the ground around it had collapsed. Our treatment plan was designed to leave the existing cap in place but we strengthened the cap and the ground around it by drilling and grouting the area. Mining Remediation Authority contractors successfully completed these works in August 2024.

With the mine shaft secured and stabilised, the area has been restored to its original condition and the play park is now safe to be reopened and enjoyed by the local community.

The site following completion of the works.

As part of our work to keep people safe and provide peace of mind we investigated and assessed 949 mining hazards and subsidence claims last year.

You can report a coal mining hazard to us, 24 hours a day, 7 days a week, by calling 0800 288 4242.