Upper Arun
Upper Arun Hydro Electric project is a Run-of-River type hydroelectric project with optimized generating capacity of 1061 MW capacity with 6 hours peaking. The cabinet meeting on 2075/06/05 decided to develop UAHEP through the Upper Arun Hydroelectric Limited (UAHEL), the subsidiary company of NEA established on 2073/10/12. Government of Nepal has included UAHEP as the Game Changer Project (GCP) among hydroelectric projects due to its relatively low cost of generation and availability of abundant firm energy.
Main Physical Features
Gross Head: 508.3 m
Design Discharge: 235 m3/sec
Installed Capacity: 27.0 MW (3×9 mw)
Total Annual Energy: 4,512 GWh (dry season energy 27.7%)
Dam: 100 m
Headrace Tunnel: 8.4 KM
Sediment Bypass Tunnel: 1.4KM
Surge Tank: 20 m diameter
Pressure drop shaft: 484 m high and 7.3 m diameter
Penstock: 39 m long before bifurcation
Turbine: 6 units of Pelton
Powerhouse Type: underground Powerhouse
Powerhouse Size: 230.05 m×25.7 m×59.43 m