The complex includes tunnel spillway, intake structure, two diversion tunnels 5.2 kilometres (3.2 mi) each, underground surge tanks, steel-reinforced concrete penstocks, and a powerhouse.

[1] Irganai is the largest derivational hydroelectric power station in Russia, with two radial-axial hydraulic units with a capacity of 200 MW each.

Its full capacity is 705,000,000 cubic metres (2.49×1010 cu ft) and alive storage capacity is 397,000,000 cubic metres (1.40×1010 cu ft).

[1] The dam and power station is projected by Lenhydroproject and operated by RusHydro.

On 9 September 2010, Russian security forces defused an explosive device equivalent to 3 kilograms (6.6 lb) of trinitrotoluene in the room.