Extensive workings near Llyn Pencraig. Being beneath the lake, the workings were prone to flooding so a deep adit was driven from the banks of the river Llugwy for over 1km, reaching a point 200ft below the mine workings in 1907. The mine is also alleged to be linked underground to the Ffriddllechwedd workings.
Two E-W lodes, Cyffty to the north, Chellinor to the south. The NE-SW Ffridd Lode enters the eastern part of the sett.
The name of lodes and shafts varied with the multitude of companies that operated here. Some evidence of Roman activity in the locality.
| Year | Activity |
|---|---|
| 1833-35 | Thomas Chaloner raises 30 tons of ore with a couple of men working - the largest return in Gwydyr for the period. |
| 1843 | Challenor erects a waterwheel to drain the workings and raises good ore over next few years. |
| 1844 | Chellenor leaves, 7 year lease taken by Morris Jones who continues to raise some good ore with a few men. |
| 1851 | Lease taken by William Proser who forms the Coed Mawr Pool Lead Mining Company. |
| 1857 | Reformed as limited liability company with the lead mining Francis family being largest shareholders. |
| 1866 | Coed Mawr Pool, together with Cyffty and Ffriddllechwedd operated as The Carnarvonshire Consolidated Lead Mines Company Ltd. |
| 1868 | Company in financial jeopadry, and sett re-possesed by E Wynne Thomas. |
| 1870 | Coed Mawr and Ffriddlechwedd operated by Bryn Llygwy Lead Mines Ltd., whose chief objective was to drive the Deep Adit. |
| 1879 | Coed Mawr Pool Lead Mining Company Ltd. |
| 1881 | Coed Mawr and Ffridd Lead Mining Company Ltd. |
| 1899-1908 | Coed Mawr Pool and Blende Mining Company Ltd. |
| 1908-11 | Pool Mining Company Ltd. |
| 1914-20 | Great Challinor Mines Ltd. |
| 1926-30 | North Wales Mines Ltd. |
External Links
Publications (3)
- Bennet & Vernon (1993); Mines of the Gwydyr Forest, Book 5 - Coed Mawr Pool, Cyffty and other mines in South Gwydyr
- Dutton, L.A. & Roberts, R.M. & Vernon, R.W. (1995); Pandora, Alltwen, Coed Mawr Pool & Gwaenllifon GAT Report; 76 pages
- Shaw, Donald L. (1971); Gwydyr Forest in Snowdonia - a History (of Forestry); 140 pages
