Former Plas power Colliery Eastern winding Engine House

The former Plas Power Colliery Eastern Winding Engine House is a rectangular building, measuring four bays by three, constructed from dressed sandstone with red brick dressings. Originally, it had a hipped slate roof, but it was roofless at the time of inspection. The windows are designed in a Romanesque style, featuring round heads and deep concentrically corbelled arch-rings and surrounds, with massive sandstone sills. The remnants of metal window frames are small-paned and include concentrically and radially glazed fanlights.

On the south elevation, which once faced the colliery chimney, there are three windows at the main floor level: one larger central window flanked by two smaller windows positioned higher on either side. Below these, at the semi-basement level, are two additional windows and a doorway, all with segmental heads. The west and east elevations have evenly spaced windows at the main floor level, with the east side appearing higher due to the lower ground level, which was the former site of ten steam boilers that supplied the colliery engines. The north elevation, facing the pit head, features large windows for the winding cable and sight lines. A continuous moulded eaves cornice runs along the top of the building.

Inside, the massive stone engine bases rise prominently above the surrounding service area and semi-basement. There are large timber beams at floor level, and part of one roof truss remains in place. A rendered dado encircles the main floor level.