Cefn Coed Colliery Engine House Range and Steam Capstan Engine

The range contains three buildings in a contiguous group: the compressor house at N end, the winding engine house in the centre, and the electrical house at the S. Each building has a gabled slate roof on an E-W axis and is of red brick. All have metal multi-pane windows with arched heads formed by concrete lintels. The windows are set into tall recessed panels with flat heads of stepped brickwork. The gables are punctured by circular openings.The compressor house is the first and smallest of the buildings. The winding engine house is the middle of the range. W gable, facing the No 2 headframe, has three openings: two 6x8 pane metal framed windows and one now bricked up which rose the full height of the gable to an arched top and was open to take the winding cables to the headframe. E gable has a pair of similar glazed windows and a central arched double doorway with glazed panelled doors and a circular window in the gable level. The S most building, the electrical house, is the largest and is slightly later, having the blocked-up windows of the winding engine house in its N wall, but conforming with the others in architectural detailing. Four bays long with windows blocked to the S in late C20. Windows in the gable ends have been blocked at the W, but are still open at a high level. A single-storey extension at the E end was formerly open but is now blocked off as it has been declared unsafe. The associated steam capstan engine, of horizontal single cylinder capstan type (and made by Llewellyn and Cubitt of Ton Pentre, Rhondda, in the 1920s), is situated immediately beyond the W gable of the winding engine house

The compressor house originally contained 2 compressors, supplying compressed air to power tools underground. One survives, a Bellis and Morcom compressor made in 1946. The E end of the building houses an exhibition area. The winding engine house contains a large horizontal twin cylinder winding engine built in 1927 by the Worsley Mesnes Ironworks of Wigan, one of the leading makers of winding engines. The cylinders are disposed either side of the winding drum and have a bore of over 80cm and a stroke of over 1.5m. The drum is some 3m wide and nearly 5m in diameter. The engine house is floored with brick paviors in herring bone patterns. The electrical building housed electricity generating equipment, the beds of which can be seen, but the interior has been cleared . A 2.4m high gallery survives along the S wall, supported by iron columns