Pump Engine House to Pascoe's Shaft on South Wheal Frances Sett at SW 678 393

The pump engine house to Pascoe's shaft on the South Wheal Frances sett is a derelict structure built in 1888 for the South Frances mine. It is constructed from uncoursed granite rubble, featuring a bob wall made of large dressed granite blocks. The window arches are made of polychrome brick, and there is a brick upper stage to the chimney, which is now roofless. The building has a rectangular plan aligned on a north-south axis, with the bob wall located to the north and the chimney attached at the south-west corner.

The structure consists of three stages and includes mostly round-headed openings. Notable features include an unusually large driver's window in the bob wall, a large cylinder door in the rear wall, and tall lancet windows—three in the rear wall and six and three in the east and west sides, respectively. The tapered cylindrical chimney has brick cornices on both stages. Historically, this engine house was built to replace a former pumping system that used flat-rod connections from Marriott's shaft and contained an 80-inch cylinder powered by four, later six, Cornish boilers. This building forms a group with the winding engine house, its functional partner located to the west.