Engine House and Fan House at Tower Colliery

The Engine House and Fan House at Tower Colliery is a 20th-century industrial building featuring a long, gabled hall with a lower projection at the rear (east elevation) and a fan chamber on the northwest corner, which has a small flat-roof extension. Constructed of brick, the building has a corrugated asbestos-cement roof with two ridge ventilators. The windows are small-pane, iron-framed, with raised, rusticated jambs typical of the Powell-Duffryn style, and concrete lintels. The hall has three tall windows on each of the long sides, positioned so that the eastern side lights the northern end and the western side lights the southern end. The northern end of the western side includes openings for the cable connecting the winding engine to the headframe. The southern gable end has two windows, with a blocked round-headed opening beneath the smaller right-hand window. The rear projection features six iron-framed windows and single-window returns.

The fan chamber has an irregular shape and a raked profile that projects in front of the western wall of the engine house, with a tall evasee at the northern end. Inside, a Scirocco fan by Davidson of Belfast is powered by two AEI electric motors. The electric winding engine includes mechanical work by Fullerton Hodgart Barclay, electrical work by Metropolitan Vickers, and brakes by Andrew Barclay. Arches connect the main hall to the rear projection, which contains switchgear by South Wales Switchgear. The floor is made of herringbone-patterned red brick, and an overhead mechanical crane by Herbert Morris of Loughborough remains in place.