External Links
Publications (1)
- (1920); BGS - Mineral Resources of GB (c1920s) Vols XIV, XV, XVI, XVII, XVIII - Fireclay; Arsenic & Antimony Ores; Refactory Materials, Lead & Zinc of Scotland, Rock-Salt and Brine (5 books); 777 pages
Viaduct Level
Coal and Fireclay Mine
Worked from c1900 to 1953
Jan 1st, 2024 from WCM by Buddle-Bot
Jan 3rd, 2025 by BertyBasset
| South Wales | |
| Cwm Ffrwd Oer | |
| 51.7109718, -3.0680799 | |
| SO 2630 0190 | |
| Private Land | |
| 175m | |
| #2,955 |
Gwenallt - 245m- Eastern Valley Black Vein - 510m
- Greenland Colliery - 565m
- Cwmffrwdoer Colliery - 728m
- Pentwyn Colliery Slope - 905m
- Elled Level - 946m
- Pentwyn Colliery Level - 948m
- Plascoed Colliery - 1,029m
- Graig Ddu Level - 1,115m
- Llanerch - 1,162m
Wainfelin Iron - 1,276m- Cwmnantddu Colliery - 1,452m
- Glynnantddu Colliery - 1,645m
- Wern Hill - 1,694m
- Mynydd Maen - 1,708m
- Abiathur Jones' Pit - 1,748m
- British Colliery - 1,777m
- Cumburgwm Colliery pit - 1,778m
- Golynos Colliery Slope - 1,802m
- Blaenserchan - 1,870m
- Glyntillery (old) - 1,879m
- Cwmburgwm Colliery - 1,908m
- Cumburgwm Colliery level - 1,918m