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Windsor Colliery

Some Information

Shan Jenkins - Looking For Information, My Dad Worked At Windsor Colliery, Near Caerphilly

Shan Jenkins
10 April 2014
Looking For Information, My Dad Worked At Windsor Colliery, Near Caerphilly

My dad worked at Windsor Colliery from 1955 on. It is very hard to find any information about the mine.

My dad has told me different things about the mine but I can't find anything about it. He told me about  a miner who died under ground in 1956-7 and my dad and three others carried him out. Also my dad has a blue scar on his back from a cave in. 1955 dad worked in the black smith shop, from 1956 he worked under ground. So much to find out. 

Maybe you can help please.

Thanks Shan Jenkins
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Windsor Colliery

Windsor Colliery was a coal mine in the village of Abertridwr, near Caerphilly. It  had two shafts North the upcast and South the downcast.
It was opened in 1895 by the Windsor Colliery Co Ltd., and later amalgamated with the Nantgarw Colliery.

The Windsor Steam Coal Co Ltd was formed in 1901 and they became the new owners. The colliery closed in 1986. Tyn yr Parc (Welsh for "house on the park") housing estate now occupies the site.

The sinking of two shafts of the Windsor Colliery commenced in 1895 by the Windsor Colliery Co. Ltd, to a depth of around 2,018 feet. The first coal was raised in 1902, with the workings connected underground to the Universal Colliery in Senghenydd for ventilation purposes. The mine was serviced by the Senghenydd branch line of the Rhymney Railway.

On 1st June 1902, Sinkers were at work deepening the shaft when the platform on which they were working collapsed tipping nine men into 25 feet of water, which had gathered in the sump. Three managed to escape drowning by clinging onto floating debris, but the other six lost their lives.

  • Edgar Brace, single Church Road, Abertridwr
  • William Davies, married, 3 children Caerphilly Road, Senghenydd
  • Thomas Davies,  married, 1 child, High Street, Abertridwr
  • Samuel Mathews, married, 1 child, Commercial Street, Senghenydd
  • William Richards,  married, 1 child, Han Road, Abertridwr
  • Griffith Woods, married, 4 children,  Han Road, Abertridwr


  • 1908 there were 1,649 men employed.
  • 1918 the workforce had grown to 1,923
  • 1923 there were 2,396 men employed, producing from the Four and Nine Feet seams
  • 1925 there were 2,550 men employed
  • 1945 there were 850 men employed

The colliery suffered from the 1920s economic downturn, as manpower slipped from 2,550 men in 1925 (the same year as maximum output of 2,550 tons of coal) to 860 ten years later. As a result, the colliery was taken over in the early 1930s by Powell Duffryn Steam Coal Company. Ownership passed to the National Coal Board in 1946.

During 1976, it became linked underground to the Nantgarw Colliery, and both collieries were worked as one unit, with coal winding and processing via Nantgarw. The majority of the Windsor work force transferred to Nantgarw on the last shift before the miners' summer holidays in 1976, but coal was still being raised in Windsor until the Christmas holiday. Production was later concentrated at Nantgarw, with Windsor kept open for ventilation, methane extraction and an emergency way out.

The whole Nantgarw/Windsor unit closed 6th of November 1986. The majority of the work force transferred to Nantgarw on the last shift before the miners summer holidays in 1976, but coal was still being raised in Windsor until the Christmas holiday. Later production was concentrated at the Nant Garw side. Windsor was still kept open for ventilation, methane extraction and an emergency way out.

Miners Honoured On Pit Memorial

A memorial honouring miners who lost their lives working in a south Wales valleys pit has been unveiled.

The memorial includes the names of those who died at Windsor Colliery
The names of 154 men have been engraved onto a specially commissioned monument which will stand at the former Windsor Colliery in Abertridwr, Caerphilly.

They lost their lives during the pit's 89-year working life, including six who died in 1902 when a platform fell.

Windsor Colliery is near the former Universal Colliery, in Senghennydd, where 520 miners died in two disasters.

The accidents in 1901 and 1913 made international news and overshadowed the losses at Windsor Colliery but members of the community have worked in order for those men to be remembered in the form of a monument.

Senghennydd Action Linking Together (Salt) were instrumental in the efforts to provide a permanent reminder of the tragedies at Windsor.

Research work to find the names of those who died at the mine has been hampered as few records remain, unlike those kept for the Universal.

On 1 June, 1902, nine miners were working on deepening the mine shaft when the platform they were working on collapsed throwing them into 25 ft of water below.

Three escaped by clinging onto debris but the rest perished.


Noel Griffiths who worked at Windsor for 31-years researched the names of those who died at the site.

"I thought it was going to be an easy task but I was in for a big surprise," he said.

"The names of those who were killed there was good up until 1914 when the first world war started.

"Then right through until the end of the second world war wasn't so good - the details were very thin."

With help from former miners at the pit including a 94-year-old local man, Mr Griffiths managed to collate the names of about 90 miners who died at the pit.

He also used newspaper archives which were stored in Bargoed library to locate the names of a further 50 and he even travelled to Swansea University where he found records of two more deaths.

In total there are 154 names on the monument, but he admits there could be more.

"There is a gap of about 20 years where no accidents are recorded," he said.

Time capsule

Funding was secured by the Communities First project and heritage body, Herian for a monument to be built at the site.

The memorial holds a time capsule filled with items and memories from local residents and school children.

The names of all those who died has been carved onto the memorial.

A dedication ceremony and the unveiling of the monument took place on Wednesday at 1830 BST.

Ex-miners who worked at the pit have been invited as well as local politicians, members of the community and school children.

"It will be interesting for them to open up the time capsule in 100-years time and see what they make of it then," said Mr Griffiths.

Windsor Colliery 20th Sep 2006