Cilgwyn quarry, Historic slate quarry in Nantlle Valley, Wales
The quarry contains three main extraction pits: Gloddfa Glitiau in the northeast, Old Cilgwyn in the west, and Veingoch in the southeast.
King Edward I of England resided in a building covered with Cilgwyn slates during his campaign to conquer Wales in the late 13th century.
The quarry archive at the University of Wales Bangor contains business papers, accounts, correspondence, and accident records from 1879 to 1933.
The quarry operated an extensive network of 2-foot gauge tramways connecting the three main pits to transport slate and manage waste disposal.
The site experienced multiple ownership changes and financial crises, with workers selling slates directly when banker George Alfred Muskett fled with £10,000 in debts.
Location: Gwynedd
GPS coordinates: 53.06150,-4.23872
Latest update: March 10, 2025 01:02
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