Overview

The Middle Marsyangdi Hydropower Plant is a crucial part of Nepal’s hydroelectric portfolio, contributing significantly to the national power supply. Located on the Marsyangdi River in the Lamjung District, this run-of-the-river (RoR) plant exemplifies Nepal’s strategic investment in sustainable energy infrastructure.

• Installed Capacity: 70 MW

• Commissioned: December 2008

• Project Type: Run-of-the-river

• River: Marsyangdi River

• Owner/Operator: Nepal Electricity Authority (NEA)

Project Highlights

• Location: Approximately 180 km west of Kathmandu, between Khudi and Besisahar in Lamjung District

• Annual Energy Generation: Approx. 398 GWh

• Turbines: 2 x 35 MW Francis turbines

• Transmission Line: 132 kV line connecting to NEA’s national grid

Significance of the Project

1. Strategic Role in Grid Stability

The plant supplies electricity to central and western Nepal, helping reduce load-shedding and stabilizing voltage in the regional grid.

2. German-Nepali Collaboration

The project was supported by the German government (KfW Development Bank), showcasing effective international cooperation in Nepal’s energy development.

3. Post-Arun III Development

Middle Marsyangdi was developed as an alternative after the cancellation of the much larger Arun III project in the 1990s, highlighting its role in Nepal’s revised hydropower strategy.

Technical Details

• Dam Type: Concrete gravity dam

• Dam Height: ~30 meters

• Headrace Tunnel: ~5 km

• Powerhouse Type: Surface

• Catchment Area: Approx. 3,340 km²

Challenges During Development

• Geological Surprises: The Marsyangdi corridor presented challenging geological conditions that delayed tunnel construction.

• Cost Overruns: Originally estimated at around USD 120 million, the cost rose significantly due to delays and redesigns.

• Delays: Commissioning was delayed by more than three years, eventually completing in late 2008.

Environmental and Social Impact

• Minimal Displacement: As a RoR project, it had relatively low impact on local communities.

• Watershed Management: Measures were taken to mitigate soil erosion and sedimentation, which are common challenges in Himalayan rivers.

Socio-Economic Benefits

• Local Employment: Thousands of jobs were created during the construction phase.

• Infrastructure Boost: Access roads and bridges built for the project also benefited local communities.

• Reliable Power Supply: Helped reduce dependency on imported electricity and supported industrial growth in nearby regions.

Interesting Facts

• The Marsyangdi River is one of the most hydropower-rich rivers in Nepal, hosting several power plants including Upper Marsyangdi, Middle Marsyangdi, and Marsyangdi Hydropower Plant.

• Middle Marsyangdi is downstream from the original Marsyangdi Hydropower Plant (69 MW), making it part of a cascade system.

Future Prospects

The Marsyangdi basin continues to attract investment, with ongoing studies for further projects. NEA and independent power producers (IPPs) are exploring opportunities to expand capacity and modernize existing plants like Middle Marsyangdi with:

• Automation systems

• Advanced sediment control

• Climate resilience measures

Conclusion

The Middle Marsyangdi Hydropower Plant plays a vital role in Nepal’s journey toward energy security. As part of a river system with high hydropower potential, this project contributes clean, renewable energy while also supporting local development and grid reliability. It stands as an example of how medium-scale projects can have a large impact in mountainous countries like Nepal.