In the grounds of the Rehau Plastics Factory on the East side of B4414.
OPEN When visited in 1999 all surface features remained intact with some green paint remaining. The louvres on the ventilation shaft are missing and the step up to the access shaft consists of a thin concrete slab on top of bricks. The locking bar is in place and the hatch was welded shut in 1998 after children left it open. According to the owner the bunks, table, shelf and cupboard remain in place. The post is now open with about 6" of water in the monitoring room. Opened in 1961 and closed in 1968.