Operation start: 1962

Altitude above the sea level: 974 m

Pressure (h): 85 m

Installed capacity: 44 MW

Turmines: 2 x 22 MW

Average annual production 37.5 GWh

Diversion tunnels 2,746 m

Operation regime The whole year


The Yerevan-1 HPP is the sixth stage of the Sevan-Hrazdan Cascade. It is located in the Hrazdan gorge, on the left bank of the Hrazdan river.

Diversion is of pressure type. The estimated consumption is 62 cubic meters per second. An equalization tower is placed on the pressure water pipe to protect it from hydraulic shocks. According to the number of turbines, at the end part the water pipe is divided into two pipes.

At the Yerevan HPP N1 and N2 Ukrainian-made 22 MW turbines produced by the Kharkov Turbine Plant in 1960 were replaced by new F 607/16 25.79 MW Indian-made Flovel turbines in 2017-2018.

The Daily Regulation Reservoir has the following characteristics:

  • FRL: 1,053.5 m
  • DSL: 1,051.5 m
  • General capacity: 118.000 cubic meters
  • Energy capacity: 21.400 kWh