Hydro-pumped storage of Flampouro, Greece

Reservoir of Ilarionas Dam at Aliakmonas river, Greece

ALIAKMONAS 1

06/2025

Upper Reservoir Capacity V = 1,8 x 10⁶ m³
Headrace Tunnel D = 4.300 mm, L ~ 2.260 m
Penstock Shafts :
- upper shaft D = 4.300 mm, H = 171 m
- lower shaft D = 4.300 mm, H = 404 m
High Pressure Tunnels :
- D = 4.300 mm, L ~ 90 m
- D = 3.000 mm, L ~ 212 m
- D = 2.300 mm, L ~ 104 m
Tailrace Tunnel D = 6.500 mm, L ~ 1.073 m
Geometrical Height H = 645 m
Norminal Discharge :
- 2 x 41,67 = 83,33 m³/s in turbine operation
- 2 x 29,41 = 58,82 m³/s in pump operation
Lower Reservoir Capacity V = 1,8 x 10⁶ m³
Underground Power Station with 2 sets of turbine & multistage pump
Power :
- 2 x 225 = 450 MW in turbine operation
- 2 x 225 = 450 MW in pump operation

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