Part of the plateway system connecting various ironstone and coal levels on the NE slope of Mynydd Aberd're with Cyfarthfa Ironworks.
(SO02080669-SO02090655).

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

1905 (OS 6-inch 2nd Edn.): Not shown.