MineArchiveCilhaul Colliery
| Location | Deri, Darran valley, near Bargoed, Caerphilly — 51.7184, -3.2745 (approximate) |
|---|---|
| Commodity | Coal |
| Type | Coal |
| Worked | 1864–By 1918 |
| Maximum depth | 30 yards (Brithdir seam) |
| Operators | Bargoed Coal Company (1864–?), Powell Duffryn Steam Coal Company (?–1918) |
Overview
A shallow pit at Deri in the Darran valley, sunk in 1864 by the Bargoed Colliery Company to the Brithdir house-coal seam at 30 yards, where women worked at the loading shute in the 1870s; Powell Duffryn later used its site to sink Ogilvie Colliery.
History
Cilhaul Colliery, at Deri in the Darran valley near Bargoed, was opened in 1864 by the Bargoed Colliery Company and sunk to the Brithdir house-coal seam at a depth of 30 yards. A photograph of about 1875 shows a group of women working at the top of its loading shute. Its Brithdir workings, with those of Cwm, were abandoned in 1892, and a later plan of the old Cilhaul or Cwm workings in the same seam is dated 1943.
By 1918 the colliery had passed to the Powell Duffryn Steam Coal Company, which closed it and used the site to sink its Ogilvie steam-coal colliery.
Geology
The Brithdir house-coal seam at 30 yards.
Workings
A shallow shaft with a loading shute at the surface.
Closure
The Brithdir workings were abandoned in 1892; Powell Duffryn closed the colliery and used the site to sink Ogilvie Colliery.
What remains
Unknown.
Redevelopment
Unknown.
Related mines
- Ogilvie Colliery — Powell Duffryn sank Ogilvie Colliery on the Cilhaul site.
Nearby mines
- Ogilvie Colliery — 0.2 miles (0.3 km) NW
- McLaren Colliery — 0.8 miles (1.3 km) NE
- Coly Colliery — 1.4 miles (2.2 km) S, Merthyr Tydfil
- New Tredegar Colliery — 1.5 miles (2.4 km) E
- Nantyffin Colliery — 1.5 miles (2.5 km) S, Merthyr Tydfil
Straight-line distance, within 9 miles (15 km). Show on the map.
Recorded claims
Individual factual claims, each attached to the source(s) that support it below. Where sources disagree, both are kept.
- Opened in 1864 by the Bargoed Colliery Company and sunk to the Brithdir house-coal seam at 30 yards. 1
- A photograph of about 1875 shows women working at the top of the loading shute. 1
- The Brithdir workings of Cilhaul and Cwm were abandoned in 1892. 2
- A plan of the old Cilhaul or Cwm workings in the Brithdir seam is dated 1943. 3
- By 1918 Powell Duffryn had closed it and used the site for sinking Ogilvie Colliery. 1
Photographs & further reading
Cilhaul's sinking, its women workers in a photograph of about 1875 and its replacement by Ogilvie.
View sourceSources
- (secondary) Welsh Coal Mines: Cilhaul Colliery (with Bryncoch and Winfield, Bargoed) — Welsh Coal Mines
- (primary) BGS / Mining Remediation Authority mine plan: CILHAUL (BARGOED) CWM, Brithdir seam, abandoned 1892 — British Geological Survey
- (primary) BGS / Mining Remediation Authority mine plan: CILHAUL OLD OR CWM, Brithdir seam, abandoned 1943 — British Geological Survey
Record created: 10 October 2026 · Last researched: 10 October 2026