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The Upper Mailun Khola Hydropower Project is a 14.3 MW run-of-river facility located in Uttargaya Rural Municipality, Rasuwa District, Bagmati Province, Nepal. The project is developed on the Mailung River by Sanima Mai Hydropower Ltd. Utilizing a gross head of 495.5 meters and a design discharge of 3.53 m³/s, the plant is equipped with two horizontal-axis Pelton turbines. Headworks are located at Rahare village, while the surface powerhouse is at Gyangsiling village. The project includes a 1736 m headrace tunnel, a 1172 m steel penstock, and is connected to the Trishuli 3B Hub Substation via an 11 km, 132 kV transmission line. This facility generates an estimated 79.67 GWh annually (13.16 GWh dry, 66.51 GWh wet). It features robust underground hydraulic structures and a 3-phase synchronous generator system. The project has been financed under a private ownership model and supports Nepal’s goal of expanding renewable energy capacity. Its high-head, low-flow design and efficient use of infrastructure make it a significant contributor in Nepal's hydropower sector.
Application for Survey License
Survey License Approved
Application for Generation License
Under Construction
Live