Sinkhole mystery solved: Brynymor Crescent collapse blamed on old manhole – road could reopen before Christmas

The sinkhole that shut down Brynymor Crescent in Swansea was not caused by old mine workings — but by a hidden manhole beneath the road surface, according to an update from Cllr Peter May.

Kit Peters
2 Min Read
Wide view of Brynymor Road sinkhole site with safety barriers, construction vehicles, and workers.
Roadworks continue at Brynymor Road following the sinkhole collapse. Welsh Water has accepted liability for the damage.

Contractors have now completed investigations and confirmed the cause of the collapse was an ageing underground structure that had gone unnoticed beneath the tarmac. Backfilling began yesterday, and resurfacing is due to start next week.

If the weather holds, the road could reopen before Christmas – though heavy rain forecast for Monday and Tuesday may cause delays.

The update marks a turning point in a saga that began in late November, when a sudden collapse forced the closure of Brynymor Crescent and sparked speculation about historic mine shafts beneath the area.

Earlier reports suggested the sinkhole was “larger than expected” and potentially linked to old workings — but the latest findings rule that out.

Cllr Peter May said:

“The team have established that the cause of collapse was an old manhole beneath the road surface. This has now been dealt with and contractors began backfilling yesterday, with resurfacing to begin next week.”

Pending no unforeseen issues, the road should be open by the end of next week — or earlier if possible.

Author

Kit Peters

Kit Peters is a journalist and the editor of Swansea Bay News, covering Swansea, Neath Port Talbot and Carmarthenshire since 2020.


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Kit Peters is a journalist and the editor of Swansea Bay News, covering Swansea, Neath Port Talbot and Carmarthenshire since 2020.
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