The Wicklow Gap, between Tonelagee Mountain and Camaderry Mountain is where the entrance to Turlough Hill electricity 'storage' hydro-plant it situated. During periods of off-peak electricity demand, water is pumped up from Lough Nathanagan, a corrie lake at the foot of Turlough Hill to an artificial reservoir at the top; when electricity demand is high, the water falls back through turbines inside the mountain to produce hydro-electric power for the national grid.