Vorotan hydroelectric power station complex consists of 3 power station, which are on Vorotan river, Syuniq marz. The power stations use the water of river and its inflow. The complex has also small Her-Her power station in Vaiots dzor marz on Arpa river Her-Her inflow near Her-Her reservoir.
The hydroelectric power station complex consists of 3 levels. The total capacity is 405.4 MW, annually the medium planned production is 1.16 milliard KW per hour.
The highest-pressure station is the 3rd level of the complex, named Tatev hydroelectric power station. The prime cost of 1 KW per hour produced in complex is the lowest in Republic.
The projecting works of the complex has been began in 1954, the construction in 1961.
In December 1970 was put into operation the first station - Tatev, in 1978 - Shamb, and in 1989 - Spandaryan hydroelectric power station.
In the structure of the complex are 4 reservoirs - longstanding, seasonal, weekly and daily organization one basin.
The scheme of the hydroelectric power station complex is the following:
Tatev hydroelectric power station
Tatev hydroelectric power station is the first one and the highest-pressure station in the complex.
The main buildings of the station:
- head junction, sloping tunnel, day regulation basin and turbine pipeline, station, ,junction
The building of the station is placed on the left bank of Vorotan river, calculating pressure is 568.8 m., has 3 aggregates with the total 157.2 thousand KW capacity, 630 million KW per hour planned annual possible production capacity.
Shamb hydroelectric power station
Shamb hydroelectric power station is the second level of complex.
The main buildings of the station:
- head junction, transfer tunnel, tolors junction, pressure tunnel and regulation basin, turbine tubing, station junction
The building of the station is on the right bank of Vorotan river.
The station has 171 000 KW total power, 320 million KW per hour planned annual possible production capacity.
Spandaryan hydroelectric power station
Spandaryan hydroelectric power station is the first level of the complex.
The main buildings of the station:
- Spandaryan hydro-junction, pressure sloping tunnel, turbine pipeline, station junction
The station has 76 000 KW total power, 210 million KW per hour planned annual possible production capacity. Calculating pressure is 295 m.
Her-Her hydroelectric power station
The actual space of reservoir is 23 million sq.m.
In the hydroelectric power station are placed 2 hydro-aggregates, each one has 0.6 MWt power.
The mean annual energy production capacity is 2.6 million KW per hour.
The calculating going out is 204 m3/sec.
Vorotan hydroelectric power station complex has the most significant place in the Armenian energy structure. The meaning is mostly important during overworking hours of day for the cargo transportation.
The water resource of complex is used also in rural and urban territories.

2 Gr. Tatevatsu str., city Goris, Armenia
Tel.: (+374 10) 28 5113, (+374 284) 2 2758, 2 2166, 2 6796
Fax: (+374 284) 2 6029, 2 6796, 2 2758
E-mail: vorotanges@rambler.ru

General director
Sasoun Khachatryan