Vertical Winding Engine House at the Former Wynnstay Colliery

Sandstone ashlar with cast-iron fixings. SE elevation has tall arched opening with stone architrave and keystone which reaches almost to eaves level, on each side a similar, lower arched opening. Right hand return is gabled with shaped kneelers and has 2 tall arched openings with stone architraves and keystones. Beneath each one is a low masonry arch. Left hand return as right hand but low masonry arches are absent. Rear has 1 tall arched opening, flush with projecting keystone

Divided into 3 chambers by 2 massive masonry walls, each with 3 arched openings with cast-iron boxes set into the wall above each arch. Side chambers have massive stone engine beds.