
1) Underground mine in Wales
Found on
https://www.crosswordclues.com/clue/aberpergwm

Aberpergwm is the site of a colliery in the Vale of Neath near Glynneath in south Wales. The drift mine was reopened in 1996 after being closed by British Coal in 1985. It is owned and worked by Energybuild, a private company now wholly owned by Walter Energy of the USA (as of April 2011). The mine has probable recoverable reserves of 7.6 million ...
Found on
http://en.wikipedia.org/wiki/Aberpergwm
No exact match found.