Errochty Dam Including Tunnel Intake Gatehouse, Tummel Garry Hydro Electric Scheme

Sir Alexander Gibb and Partners (consulting engineers), A and A Carmichael (contractors), 1956. Large diamond-headed buttress dam with access roadway oversailing central spillway and separate intake gatehouse located upstream of dam wall dominating upper Glen Errochty. Shuttered concrete with some reinforced concrete to intake gatehouse. Battered downstream face with deep buttresses, those flanking spillway integrated with spillway walls to base of dam. Large buttress to centre of spillway with small control room and dispersal valve to base; integrated square-plan gatehouse at upper level set on upstream side of dam. Small control room to base of buttress to right (NE) of spillway with pipeway control valve. Parapet to top advanced slightly beyond roadway and integrated with buttresses. Roadway oversailing central spillway on rectangular concrete piers. Similar design to upstream face. TUNNEL INTAKE GATEHOUSE: set adjacent to upstream face of dam. Tall 2-storey square-plan gatehouse set on podium with vehicular access oversailing water on round concrete columns. Large panelled teak vehicular access doors to S elevation with 3 small windows to attic storey above; similar windows to W and N elevations. Pedestrian doorway to E elevation with louvered vents to left (S) and pair of tall windows above. Small paired windows to attic.