Former Winding Engine House to Williams Shaft, Dolcoath Mine

The former winding engine house for Williams Shaft at Dolcoath Mine was built around 1900 for the Holman horizontal winder. It is now derelict and roofless. The structure is made of snecked granite with ashlar dressings and has a rectangular single-cell plan oriented on a northeast-southwest axis. It features a high single storey raised on a large surface basement. The three-bay northwest front, which faces the former shaft, is symmetrical and includes a continuous weathered offset to the basement, a large rectangular cable aperture in the center, and a large vertical-rectangular window opening on each side. The southwest gable wall has a round-headed doorway leading to the basement, complete with a keystone, a small window to the right, two large window openings above, a weathered band at the gable, and a small window in the apex. The northeast gable wall is similar, but the basement doorway is damaged, and both gables are missing their former coping. Inside, the long walls have stumps of closely-spaced steel corbels that supported former floorbeams. The unique traversing operation of the engine was historically significant, and at the time of its construction, Dolcoath was one of the world's greatest tin mines.