Part of the plateway system connecting various ironstone and coal levels on the NE slope of Mynydd Aberd're with a transhipment point on the Cwm Pit Railway.
(SO02150625-SO02020623).

1905 (OS 6-inch 2nd Edn.): A branch running W to from a junction with the reversing junction deviation on the branch to an ironstone level west of Ochr-y-mynydd.