Site Record

This slag heap is found just to the east of the site of an engine house, which is shown to be working and part of the Cae'r Defaid colliery complex on the 1877 1:2500 Ordnance Survey map. The slag is presumably derived from the boiler house which was attached to the beam engine that operated here. It has been tipped onto the northern, upslope side of a larger colliery spoil tip of unknown origin. Most of the tip is grassed over and the extent of the slag tipping is not immediately clear. J.J. Hall, Trysor, 23 May 2011