West Rosedown Mine Pair of Engine Houses and 3 Chimneys at Sx 277 717

West Rosedown Mine consists of a pair of engine houses and three chimneys, built around 1870. The structures are made of slatestone rubble with brick dressings.

The northern engine house is constructed of slatestone rubble on a granite plinth, featuring granite quoins. It has gable ends at the front and rear, with a chimney located about 20 meters from the rear gable end. This chimney is circular and tapered, and there are remnants of a rectangular building attached to the east side. The front gable end includes a round-arched bob opening with granite voussoirs, while the right side has a window opening with granite jambs and voussoirs. The rear gable end features a wide round arch at ground level with granite voussoirs and two window openings above with flat granite lintels.

The southern engine house also has a gable end front facing north, with a bob opening that has a flat timber lintel. The front includes three granite walls that form two trenches. The rear gable end has window openings at all three levels. The left side features a door at ground level and a window above, while the right side has a door as well, though part of the wall is collapsed. The chimney for this engine house is located about 10 meters to the southwest, is circular and tapered, and has a brick top.

West Rosedown Mine was owned and operated by the Marke Valley adventurers from 1858 onwards. It was originally part of the old Wheal Jenkin, which was worked by Cornwall Great United in the 1830s. The mine was established with hopes of finding tin at depth, leading to the erection of a 60-inch engine in 1862 to facilitate sinking. However, production declined, and by 1883, it was decided to sell off all underground and surface machinery related to the old copper section of the mine.