4 pits. Much of the site covered by PYO waste, but there are some remains.***

Middle Adit

Middle adit, located on same level as main dressing floor, is open, and is in good condition apart from a collapse right at the entrance. The adit has slate slabs for walking, but rail and sleepers have been removed apart from the odd bit of rail and fastenings. The adit terminates at a precipitous drop overlooking the pit. The adit can be seen continuing into the opposite quarry wall on what must have been an exploratory drive prior to digging the pit.

Lower Adit

Located just north east of the Twll Mawr pit at the point where the Pen y Bryn tips are about to inundate it. Collapsed a short distance inside.