Cwmorthin Quarry Incline
From Festipedia, hosted by the FR Heritage Group
The line of the 1850 tramway from the Cwmorthin Quarry, best seen from the area of Penstocks Road crossing, comes down to the railway on an incline immediately above footbrige 1 (Tanygrisiau). The tramway was extended to also serve Conglog, descended 2 inclines to join the railway just above Tanygrisiau.
See also "Cwmorthin Slate Quarry" by Graham Isherwood ISBN 0-9522979-1-4