Monar Dam And Deanie Tunnel Intake Tower, Glen Affric Hydro Electric Scheme

The Monar Dam and Deanie Tunnel Intake Tower, part of the Glen Affric Hydro Electric Scheme, was likely designed by James Williamson and Partners in 1963, with W M Halcrow and Partners as the principal contractors. This prominent dam features a horseshoe-shaped double arch design set in a steep gorge. It has a walkway that oversails the spillway gates, which are supported by concrete piers that are battered on the upstream face. The dam is made of concrete and includes painted steel flap gates for the spillway, along with stepped concrete abutments on the downstream face. The downstream face is slightly flared with an angled lip beneath the gates. Needle valves are located at the base of the downstream face, with a round arched housing positioned above. The upstream profile is arched, featuring a deep lip beneath the spillway gates. To the far left (west) is a small single bay gantry and instrument house, which has large teak doors.

The intake tower is a single bay structure with a flat roof, featuring a large sloping concrete buttress made up of linked individual piers at the rear. This tower is set on a square pedestal that houses the tunnel intake, which is typically below water level. The tower has plain surrounds for a large teak vehicular door and bipartite metal windows.