IIBlaen y Cwm Viaduct Nant-y-bwch is situated along the A465 (Heads of the Valleys road), 0.5 km N of Tredegar. Railway viaduct is prominently visible from the road, NE of the Tredegar roundabout and is reached via a foot
IICrimble Viaduct Slaithwaite, Kirklees, West Yorkshire, HD7
IICroeserw Viaduct Spanning the Afan river approximately 200m E of the centre of Cymmer.
IICrumlin Viaduct E Abutment Ebbw Valley High on the E side of the Ebbw Valley, the open ground of the steep hillside falling away below, with the Sofrydd development above.
IICrumlin Viaduct NE Abutment Cwm Kendon On the W side of the spur of land between the Ebbw Valley and Cwm Kendon reached by a footpath from the foot of Cwm Kendon or by Load of Hay Road above.
IICrumlin Viaduct W Abutment Ebbw Valley High on the W side of the Ebbw Valley, reached by a pathway from the foot of Cwm Kendon or by Load of Hay Road above.
IINant Dyar Railway Viaduct Located some I km SW of Clydach village. Viaduct carries public footpath leading from Clydach - Waunllapria by-road, past former railway station.