Nant yr Helfa
| Alternative names | |
|---|---|
| Location | SH833401 (Area map showing location.) |
| Parish | Llanycil |
| Geology | Manganese mineralisation occurs associated with minor N–S vertical faults. The host rock is yellowish tuff of the Llyn Conwy formation. [Lynas 1973: 497] |
| Owners | |
| Recorded output | |
| Transport | |
| Remains |
In 1886 there was some interest in this mine. J Roberts of Bryn Crafnant, Trefriw wrote to E Watkins (the Rhiwlas estate manager) in June saying that a friend of his was anxious to get a manganese mine and Nant yr Helfa would suit him. He wrote again in July asking if the mine would become open soon as he felt he could do something with it [GAS DAO: Z/DDD/2/579, 601].
At the end of 1906 a lease was drawn up for R J Lloyd Price and William Owen for the mining rights at Nant yr Helfa (together with Caefadog, Cwm Cottage and Rhydyfen) for one year (with provision for converting to 20 years in a year’s time) for a consideration of £20 p.a. with a royalty of 1s/ton of manganese [GAS DAO: Z/DDD/3/22, 25]. (The lease also included the right to work graphite with a royalty of 1/10th of the value of graphite produced.)
| Front page | Index of mines | Area maps: Arenig, Harlech |