MineArchiveGlyngwyn Colliery
| Location | Miskin, near Mountain Ash, Cynon Valley, Rhondda Cynon Taf — 51.6776, -3.3761 (approximate) |
|---|---|
| Commodity | Coal |
| Type | Coal |
| Worked | 1885–December 1925 |
| Maximum depth | Unknown. |
| Operators | Nixon's Navigation Coal Co. Ltd. (1885–1925) |
Overview
A house-coal level at Miskin, Mountain Ash, opened by Nixon's Navigation Coal Company in 1885 in the No. 3 Rhondda seam and closed in December 1925.
History
Glyngwyn was a level at Miskin, near Mountain Ash, opened in 1885 by Nixon's Navigation Coal Company to work the No. 3 Rhondda seam for house coal, alongside the company's steam-coal pits at Mountain Ash. It raised 17,373 tons in 1889.
In 1896 it employed 117 men, all but five underground, under James Davies. The workforce passed 200 in the early 1900s: 226 in 1908 under F. W. Ball, 258 in 1913 under A. A. Jenkins, and 308 in 1915 and 1916 under A. H. Williams. The No. 3 Rhondda Rider was abandoned in July 1915.
The returns of the 1920s are uneven: NMRS has the level missing from the lists until 1921 and only nine men in 1923, against 312 in Welsh Coal Mines for the same year and 264 in 1924 and 1925. It closed in December 1925, when the No. 3 Rhondda was abandoned.
Geology
South Wales coalfield, Cynon valley: the No. 3 Rhondda seam and its Rider, worked for house coal.
Workings
A level into the No. 3 Rhondda seam.
Closure
Closed in December 1925, when the No. 3 Rhondda seam was abandoned.
What remains
Unknown.
Redevelopment
Unknown.
Related mines
- Nixon's Navigation Colliery — Both worked by Nixon's Navigation Coal Company at Mountain Ash.
Nearby mines
- Nixon's Navigation Colliery — 0.3 miles (0.5 km) N
- Cwm Cynon Colliery — 0.4 miles (0.7 km) SE
- Deep Duffryn Colliery — 0.7 miles (1.1 km) NW
- Lower Duffryn Colliery — 1.1 miles (1.8 km) NW
- Penrikyber Colliery — 1.1 miles (1.9 km) SE
Straight-line distance, within 9 miles (15 km). Show on the map.
What's uncertain
Points where sources disagree or the record could not be settled; both accounts are kept. All open questions in the archive.
Recorded claims
Individual factual claims, each attached to the source(s) that support it below. Where sources disagree, both are kept.
- Opened as a level by Nixon's Navigation Coal Company in 1885 in the No. 3 Rhondda seam. 1,2
- Employed 117 men in 1896, including 5 at the surface. 1,2
- Employed 308 men in 1915 and 1916. 1
- Employed 312 men in 1923. (disputed) 2
- Employed 9 men in 1923. (disputed) 1
- Closed in December 1925 when the No. 3 Rhondda seam was abandoned. 1,2
Photographs & further reading
Welsh Coal Mines' page on the level.
View sourceSources
- (secondary) Glyngwyn Colliery — Northern Mine Research Society
- (secondary) Glyngwyn, near Mountain Ash — Welsh Coal Mines
- (primary) BGS mine plans: Navigation / North / Abergorki / Miskin / Fforest / Glyngwyn Levels, Nine Feet — British Geological Survey / Mining Remediation Authority
Record created: 7 October 2026 · Last researched: 7 October 2026