Cwm Nant-y-Groes Coal Level. Situated up in the Cwmnant-y Groes area of Six Bells, the colliery is featured on the 1843 map of the coalfield as being in production and had a tramway to the main tram road at Six Bells. Messrs T. P. & D. Price. The coal level was opened by Messrs T. P. & D. Price. Mr …
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