Brynmill sinkhole saga rumbles on — crews dig deep after second collapse

This morning we revealed how the street had collapsed again, forcing a fresh closure between Westbury Street and Eaton Crescent. Heavy machinery and barriers are now back in place as engineers work to stabilise the site.

From November shock to December drama

The saga began on 22 November, when a sudden collapse forced the closure of Brynymor Road. What at first looked like a small hole quickly grew into a major headache, with councillors warning the damage was larger than expected.

Investigations followed, with engineers probing whether old mine workings beneath the Crescent were to blame. For weeks, the mystery deepened as crews dug into the road surface, trying to uncover the cause.

By mid‑December, the answer finally came: the collapse was traced back to an old manhole chamber hidden beneath the tarmac. With the mystery solved, hopes rose that the road could reopen before Christmas.

On 17 December, councillors gathered for a photo call to mark the reopening, praising the swift repair and celebrating the return of traffic to one of Brynmill’s busiest streets.

Collapse number two

But the celebrations didn’t last long. Within hours, a second sinkhole appeared nearby, plunging the street back into disruption and forcing crews to return with diggers and trucks.

A Swansea Council spokesperson said:

“Our highways maintenance teams are at the site of a second sinkhole on Brynymor Road. We are doing all we can to repair as quickly as possible and reopen the road.”

They added:

“The road is closed between Westbury Street and Eaton Crescent. Brynymor Road between King Edward Road and St Helens Road remains open to motorists who are visiting local businesses in the area. Apologies for any inconvenience this is causing.”

Images from the scene

Photos taken Thursday show crews in high‑vis jackets operating diggers and trucks, excavating the collapsed section and cordoning off the street with barriers. The fresh hole exposes layers of asphalt and soil, as engineers work to stabilise the site.

Digging deep: excavator and highways team tackle the collapsed section of Brynymor Road.
(Image: Swansea Council)Fresh collapse: excavator lifts debris from the newly formed Brynymor Road sinkhole.
(Image: Swansea Council)Excavation in progress: crews dig into the collapsed section of Brynymor Road.
(Image: Swansea Council)Emergency response: highways team works to stabilise Brynymor Road after second sinkhole
(Image: Swansea Council) #Brynmill #BrynymorCrescent #BrynymorRoad #EatonCrescent #KingEdwardRoad #Sinkhole #StHelensRoad #SwanseaCouncil #Uplands #WestburyStreet

Brynymor Road sinkhole larger than expected, says councillor

The sinkhole that forced the closure of Brynymor Road in Swansea last week is “significantly larger than first anticipated,” according to Uplands councillor Peter May, who shared an update on social media after meeting with Welsh Water engineers.

Cllr May said the company had accepted liability for the collapse, which is believed to have been caused by a major leak just above the affected area. That leak was repaired last week, but engineers are still working to assess the full extent of the damage beneath the surface.

“The hole is significantly larger than first anticipated,” he wrote, “and when I left site they were still trying to find the extent of the void under the road.” Based on surface cracking, the damage could stretch around three metres wide, five to six metres long, and just over one metre deep.

Excavation underway at the Brynymor Road sinkhole site. Engineers are working to assess and repair the damage.

Welsh Water plans to excavate the area fully, backfill it with new material, and reinstate the carriageway. While repairs were initially hoped to be completed by Thursday evening, Cllr May said that timeline was “somewhat optimistic” and that a Friday reopening was more likely.

“There was a significant leak just above the sinkhole which was repaired last week,” he added. “Welsh Water agree that this has in all probability caused the collapse.”

Council investigation continues

Swansea Council last issued an update on 24 November, confirming that highways teams had begun investigating the cause of the sinkhole, which appeared at the junction of Brynymor Road and Westbury Street.

The council said the road would be reinstated once the investigation was complete and the area made safe. In the meantime, Brynymor Road remains closed to traffic between Westbury Street and Eaton Crescent. Westbury Street itself is open, but there is no access onto Brynymor Road from that junction. The section of Brynymor Road between St Helen’s Road and King Edward Road remains open to traffic.

#brynymorCrescent #brynymorRoad #eatonCrescent #kingEdwardRoad #roadClosure #sinkhole #stHelensRoad #swansea #swanseaCouncil #uplands #welshWater #westburyStreet