Two small pits, reworked in 1980s for green slates.**

The site contains a small modern shed housing a locally built diamond-sawing machine, representing a modest concession to contemporary technology. More characteristic of the quarry’s improvised character is a sawing machine ingeniously constructed on the bed of an old lathe. Warehouse-style weighing machines are also present, once used for handling and dispatching the finished slate products.

Fronheulog is a small hillside working that was formerly part of the Tan-y-Allt operation. It was actively worked on a very small scale during the 1990s, using extremely traditional techniques—essentially pre-19th-century crow-bar methods for levering slate from the rock face, a practice that had scarcely changed in over two centuries. The quarry now appears to be dormant.