Part of the plateway system connecting various ironstone and coal levels on the NE slope of Mynydd Aberd're with Cyfarthfa Ironworks.
(SO02190687-SO02040665).

1884 (OS 6-inch 1st Edn.): A branch running from the main western line south to an ironstone level.

1905 (OS 6-inch 2nd Edn.): Extant.