In tandem with the Sanjen Upper Hydroelectric Project, Sanjen Jalavidhyut Company Limited is also developing the Sanjen Hydroelectric Project with a capacity of 42.5 MW. The project scheme is the cascade development of Sanjen Upper Hydroelectric Project so the water from the tailrace of upper scheme is directly utilized by the lower scheme. It generates annual energy of 241.865 GWh from the available gross head of 442 m. In the case of the design discharge, 0.50 m3/s discharge from Chhupchung Khola is added to the intake/forebay of the lower scheme, resulting in a design discharge of 11.57 m3/s. ChesCo has conducted Construction Supervision of this project. Also, ChesCo is providing services for supply of Technical Human Resources for Operation and maintenance of the project.