Installed capacity of the project is 73 MW with the design discharge of 73.71 m3/s, corresponding to 42.71% exceedance flow. The catchment area of the Project is 2002.32 km2 and the gross head is 132 m. The 60 m long weir has its crest level at 887 m above mean sea level (amsl). The maximum height of weir crest from its original ground level is 10.5 m which diverts the required flow to the Intake. Two undersluice gates maintain the design water level for intake and flush excessive deposits deposited in front of the intake area. Intake comprises of 6 opening which guides the flow towards gravel trap and successively towards underground settling basin via. an approach pipe of about 265.5 m length. A 100 m long underground settling basin designed with 90% trap efficiency passes the clean water into the headrace tunnel. About 3372 m long headrace tunnel (concrete lining and shotcrete) with excavated diameter of 6.5 m passes the design discharge to the penstock. Proposed penstock is of 4.5 m (internal diameter) till the branching length of about 231 m after which three penstock pipe each of 2.25 m internal diameter supplies the water to the powerhouse. Powerhouse is 56.5 m long and 26 m wide with the normal level at 755 m amsl. The tail water is channelized back to the Tamor River via a 75 m long tailrace culvert. Four units of vertical axis Francis turbine each of 18.25 MW capacity is proposed to generate the designed output of 73 MW. Power evacuation from powerhouse is planned through 10 km long 220 kV Double circuit transmission line to Dhungesanghu substation of the Koshi Corrider purposed by Nepal Electricity Authority (NEA). Annual energy supplied to the NEA will be 429.17GWh as per the PPA .
 

Gross head                                                          123 m
Design Discharge (at 42.71 %)                         73.71 m3/s
Catchment area                                                 2002.32
Headrace Tunnel                                               3372.06 m
Total energy output (PPA)                                429.17 GWh
Dry Energy                                                         64.90 GWH
Wet Energy                                                        364.27 GWh

 

 


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