NPRN407090
Cyfeirnod MapST09NE
Cyfeirnod GridST0901796768
Awdurdod Unedol (Lleol)Merthyr Tudful
Hen SirGlamorgan
CymunedTreharris
Math O SafleTWNNEL RHEILFFORDD
CyfnodÔl-Ganoloesol
DisgrifiadTunnel, 640m long, taking the Taff Vale Extension railway through to the Cynon valley under the Cefn Glas ridge; disused.
RCAHMW, 29 November 2007.