Engine House And Boiler House And Workshop Ruins At Engine Shaft, Part Of Killifreth Mine At Sw 736442

The ruins of the engine house, boiler house, and workshop at Engine Shaft are part of Killifreth Mine and date from the late 19th century. Constructed from killas rubble with granite quoins, jambstones, and bonding stones, the site features a round stone rubble chimney with a brick upper stage on the northwest side and a round-headed brick arch leading to the bob wall. The main engine house has a rectangular plan and is in a state of ruin, lacking a floor, roof, or timberwork over the bob wall, although the stone walls remain fairly intact except for the west gable, which has collapsed. The chimney is topped with a corbelled brick collar. Killifreth Mine was restarted in 1865, when engines were installed to work greater depths, indicating that this engine house is part of that development. During this period, Killifreth Mine was also connected to Great Wheal Busy and Wheal Unity Wood.