Conglog Slate Quarry, Slate quarry in Tanygrisiau, Wales
Located northwest of Tanygrisiau, Conglog Slate Quarry contained five different veins of Ordovician slate, with miners focusing on extraction from back and north veins.
The quarry operated from 1854 to 1910, starting when William Ormsby-Gore granted permission to Robert Roberts and John Williams to extract slate from Cwmorthin Ucha farm.
The site represents Welsh industrial heritage through its remaining structures and machinery, illustrating the methods of slate extraction in nineteenth-century Wales.
The quarry utilized a double-track inclined plane system powered by gravity and a waterwheel to transport and process the extracted slate materials.
The quarry developed connections with nearby Rhosydd quarry, leading to negotiations and agreements about shared land use between the two mining operations.
GPS coordinates: 52.99990,-3.98360
Latest update: March 2, 2025 19:43
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