Simbuwa Khola Hep

The Simbuwa Khola Hydroelectric Project is a 70.34 MW run-of-river (RoR) project located in Faktanglung Rural Municipality (formerly Lelep and Tapethok VDCs) of Taplejung District, utilizing the flow of the Simbuwa Khola, a tributary of the Tamor River. The project has a gross head of 888.86 meters and a design discharge of 9.24 cumecs at 40% flow exceedance. Major components include a 5-meter-high, 17-meter-long weir with two intakes (3.2 m × 2.5 m), an 80-meter-long two-chamber underground desanding basin, a 4.393 km headrace tunnel, and a 26-meter-high underground surge shaft. The design flow is directed towards the underground powerhouse through a 1.8 m diameter pressure shaft with three vertical drop of up to 300 m and 2710.42 m length. The project is expected to generate 378.96 GWh of electricity annually, which will be evacuated through the proposed Koshi Corridor to the Dhunge Sangu substation.