Open questions: Bridgend

Where sources disagree, MineArchive keeps both accounts rather than picking one; where a fact could not be settled, the record says so. 44 such claims on 20 records. All regions.

Aber Colliery

The drift was opened to work the No. 3 Rhondda seam. (disputed)
The original drift worked the No. 2 Rhondda seam from its outcrop, and a second drift into the No. 3 Rhondda was driven about 1886. (disputed)
Aber Colliery closed in 1914. (disputed)
Men were still listed at Aber into the 1920s: 20 in 1920 and 10 in 1922-24. (disputed)

Barrow Colliery, Bryncethin

Small-scale house-coal working at Bryncethin — Robert Watson's pits in the 1830s and a small colliery at Tynycoed sunk c.1830 — predates the deep Barrow shafts by decades. (uncertain)

Bryndu Colliery

Welsh Coal Mines dates the explosion that killed four to Thursday 11 November 1852; NMRS gives 18 November 1852. (disputed)
Welsh Coal Mines gives twelve killed on 28 May 1858 and names twelve; NMRS gives eleven on 27 May. (disputed)
By 1908 Bryndu had closed, with 461 employed at Cefn. (disputed)
The colliery closed in 1913 after accumulated losses of £90,000. (disputed)
Cefn Slip Colliery, opened about 1857 to supply the Cefn ironworks, became the Bryndu Colliery Co. Ltd in 1908 and closed in 1912 after serious water incursion. (uncertain)
The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Bryndu' (catalogue SWR1183, Red Vein (North Fawr), dated 1874); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Brynwith Colliery

Hedley's Collieries opened it around 1875. (disputed)
The death of James Brain in December 1910 was the first in the six years since the colliery opened. (disputed)
The abandonment plan of Brynwith and its old workings is dated 1935. (disputed)
It employed 490 men in 1937 and in 1940-42. (disputed)

Caedefaid Colliery

The level was formally opened in October 1867 by the Llynvi Coal and Iron Company. (disputed)
The No. 9 level was opened in 1863 by John Brogden and Sons. (disputed)

Caerau Colliery

The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Caerau' (catalogue SWA1012, Caerau, dated 1967); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Coegnant Colliery

The Lists of Mines record 1,592 people employed in 1915 (1,422 below ground, 170 at the surface). (disputed)
A secondary account states that manpower had risen to 1,900 by the outbreak of the First World War. (disputed)
The colliery's headframe was encased in concrete, described by one local photographic account as an almost unique feature among Welsh collieries. (uncertain)

Cribbwr Fawr Colliery

The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Cribbwr Fawr' (catalogue SWR1304, Five Feet (Nive Feet), dated 1930); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Ffaldau Colliery

The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Ffaldau' (catalogue SWT1413, Spoil Tip [No.320], dated 1975); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Garth Merthyr Colliery

The colliery was sunk by John Brogden and Sons, in two pits of fourteen and twelve feet diameter, to the Caedefaid seam at 140 yards; the NMRS dates the opening to 1865 and Welsh Coal Mines has Brogden beginning the sinking in 1864. (disputed)
The shafts were deepened to the Six-Feet seam at 250 yards and the upcast to the Red Vein at 270 yards; the NMRS gives the year as 1883 in one passage and 1889 in another, the latter tied to the Garth Merthyr Colliery Company formed in 1888. (disputed)

Gin Pit, Maesteg

Gin Pit probably originated as Nant-y-Crynwydd Colliery and was opened by the Llynvi Iron Company on the site of its ironworks, probably in the early 1840s; the name is thought to be a shortened form of 'Engine Pit'. (uncertain)

Lluest Colliery

The colliery is mentioned in a list dated 1880 under the Lluest Coal Co. Ltd, and by 1887 was owned by the Abernant Colliery Company and managed by H. Harries. (uncertain)
The colliery worked the No. 3 Rhondda seam at a thickness of between twenty-two and forty-two inches. (uncertain)
The Inspector of Mines' list for 1896 records 154 men employed at this house-coal colliery. (uncertain)
Production ceased at the colliery in 1902. (uncertain)

Maesteg Deep Colliery

The Llynfi, Tondu and Ogmore Vale Coal and Iron Company sank the mine in the 1860s. (disputed)
North's Navigation Collieries took over the running of the mine in 1890. (disputed)
North's Navigation Collieries bought the mine in 1899. (disputed)

Newlands Colliery

The colliery was a drift driven into the Upper Nine Feet seam. (disputed)
The colliery consisted of slants and a pit 253 yards deep, working seams under Margam Bay. (disputed)

Oakwood Colliery

The mine was opened in 1864 by W. Davis and was locally known as Pwll Davis; it eventually reached the Lower Nine Feet seam at 285 yards. (disputed)
The colliery was opened in 1868 by William Davis of Bridgend on the site of a level worked by Charles Sheppard of Bath, and closed in 1928. (disputed)

Raglan Colliery

It was maintained for pumping until 1943. (uncertain)

Rhondda Main Colliery

Sinking began in 1910 and continued until 1912. (disputed)

Ton Phillip Colliery

The Rock Fawr seam at Ton Phillip was abandoned in 1944. (disputed)
Abandoned in 1945. (disputed)

Tytalwyn Colliery

The workings were abandoned in January 1949. (disputed)

Ynysawdre Colliery

Slants driven in 1915 failed to find workable coal and were abandoned in 1918. (disputed)
Surface drivages opened in 1915 were abandoned in October 1921 without finding a workable seam. (disputed)