A three-armed tramroad linking coalworkings and quarries to the Neath Canal at Clyne, between Tonna and Resolven. The NGR given is the canal wharf at Clyne, the terminus of the southern line. Two of the arms were rebuilt on new alignments before the OS 1877 25-inch mapping of the area.
The line of only the southernmost arm is now clear on modern maps.

The courses of the three lines are as follows:
1. Cwm Blaen Pelenna: SN79800017 - SS81159985 - SS82069822
2. Upper Twrch Brook: SN80010030 - SS81439997
3. Lower Twrch Brook: SN80240058 - SN80700027


See NMRW record card for maps and notes on associated structures.

David Leighton, RCAHMW, 6 November 2007.