"soundwell colliery" was a group of pits, of which the chief were soundwell lower pit at and soundwell upper pit, or high pit, at . the location is just north of chiphouse road, a little west of station road. the branch is shown on the 1840/50 ordnance survey maps, joining the main line near where fisher road crosses siston brook, at . the line of the branch to soundwell is still visible as a platform running down the side of the embankment across siston common and as a shallow indentation in the grass adjacent to the road at the soundwell end of the embankment. pictures of this branch are shown in the book by peter lawson. the colliery had closed in 1853 following an inundation.