Double Engine House

Engine House about 7 m wide by 15 m long with an annexe at its NE corner about 4 m by 5 m. Irregularly coursed local sandstone masonry with dressings of limestone in the main part and of brick in the annexe. Some timber lintels have been restored in concrete. The beam wall runs across the centre of the main part. To its W side were the blowing cylinders. There is a low level aperture in the W wall for the air main to exit. Some holding-down bolts survive at the N side of the building to the W of the beam wall. The flywheels were to the E of the beam wall, but the space for them is partly blocked by a mass of later masonry.

The window and door openings of the original part are round-headed. The E elevation is treated as the front, with projecting voussoirs at the imposts of the arch and a projecting keystone. At high level in the E elevation there is a roundel window of about 1 m diameter, with a projecting voussoir at each of the four cardinal points. The quoins are regularly coursed in limestone. Round arched dressings in side walls, similarly detailed, and aligned for symmetry.