Irganai Dam

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Irganai Dam
Irganai Dam is located in Republic of Dagestan
Irganai Dam
Location of the Irganai Dam in Dagestan
Country Dagestan, Russia
Location Untskul region
Coordinates 42°44′42.72″N 46°49′53.76″E / 42.7452000°N 46.8316000°E / 42.7452000; 46.8316000Coordinates: 42°44′42.72″N 46°49′53.76″E / 42.7452000°N 46.8316000°E / 42.7452000; 46.8316000
Status Operational
Construction began 1977
Opening date 1998
Owner(s) RusHydro
Dam and spillways
Impounds Avar Koisu
Height 111 m (364 ft)
Length 317 m (1,040 ft)
Reservoir
Creates Irganai reservoir
Total capacity 705,000,000 m3 (2.49×1010 cu ft)
Surface area 18 km2 (6.9 sq mi)
Power station
Turbines 4 x 200 MW
Installed capacity 400 MW
800 MW (max. planned)
Annual generation 1,280 GWh

Irganai Dam is a hydroelectric dam in the Untskul region of Dagestan, Russia. It is located on the river Avar Koisu.

History[edit]

Construction of the dam and power station started in 1977. The first generation unit of the Irganai hydropower station was launched in 1998.[1] The second generation unit was launched in 2001.

Technical description[edit]

The dam is 111 metres (364 ft) high and 317 metres (1,040 ft) long at the crest. It is filled of gravel with asphalt-concrete diaphragm. 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.[2] The power station has a total installed capacity of 400 megawatts (MW) and projected capacity of 800 MW.[1][3] Its mean annual electric energy output is 1,280 GWh.

The dam creates the Irganai reservoir. The reservoir has a surface area of 18 km2 (6.9 sq mi). 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.

Incidents[edit]

On 7 September 2010, fire broke-out at power station's hall. On 9 September 2010, Russian security forces defused an explosive device equivalent to 3 kilograms (6.6 lb) of trinitrotoluene in the room.[4][5] On 31 January 2011, a stick of dynamite was discovered at the power station.[6]

References[edit]

  1. ^ a b c d "Fire at Irganay HPP". Hydroproject. 2010-09-08. Retrieved 2011-01-31. 
  2. ^ "Bomb found following fire in hydroelectric plant in Russia's Dagestan". RIA Novosti. 2010-09-09. Retrieved 2011-01-31. 
  3. ^ "Fire breaks out at hydropower plant in Russia's Dagestan". HydroWorld (PennWell Corporation). ITAR-TASS. 2010-09-08. Retrieved 2010-09-08. 
  4. ^ "Explosive device found, defused at hydropower plant in Russia". HydroWorld (PennWell Corporation). 2010-09-09. Retrieved 2011-01-31. 
  5. ^ "Bomb blast prevented at Irganai Dam". Voice of Russia. 2010-09-09. Retrieved 2011-01-31. 
  6. ^ "Dynamite found at power plant in Russia's Dagestan". RIA Novosti. 2011-01-31. Retrieved 2011-01-31.