Llyn Eiddew Mawr
|Alternative name||Llyn Eiddaw
Llynau Eiddew [GAS DAO Z/DAM/630]
Llyn Ciddew Mawr [Halse 1887: 111] (typographical error?)
|Location||SH645340 (Area map showing location.)|
|Geology||The manganese bed outcrop runs south-west from the northern extremity of Llyn Eiddew Mawr for about 600 m. The bed is about .3 m thick and dips northward. [Dewey & Bromehead 1915: 53]|
|Production and Employment||
|Transport||Internal tramways. Output by road to Talsarnau.|
|Remains||Mainly opencast workings close to north end of lake. Surface and underground pack walls well preserved. Where tramway formations from faces emerge from cuttings though backfill there are stone floors, one about 6 m x 1.5 m. There is a pair of substantial bridge abutments where a tramway to a tip crossed above the mine exit track. (June 2002)|
|Access||The north-west end of the mine is crossed by a public right of way to the lake.|
Ore was described as existing here in 1887 [Halse 1887: 111].
In 1915 the mine was described as “abandoned” with ore recently extracted and waiting to be removed. [Dewey & Bromehead 1915: 53], however, in 1923 it was stated to have been worked during WW1 and was currently “active” [Dewey & Dines 1923: 64]
The name Craig Ddrwg is mentioned in Llais Ardudwy [September 1988] in a reference (undated) to a choir from Gwaith Mango Graig Ddrwg uwchlaw Talsarnau, Merion (Craig Ddrwg manganese work [i.e. mine] above Talsarnau, Merioneth) – Craig Ddrwg is the name of the ridge to the east of and overlooking Llyn Eiddew Mawr.