Originally it was part of the Lancashire Union Line and built in about 1869 to bypass Wigan and serve local collieries and iron works.
The company was vested jointly between the LNWR and LYR from 1883 until the two parent companies merged in 1922, according to old maps this section which is South of Welley Junction was operated by the LNWR.
I believe this section of the line was closed in 1976.