Dolakha, 20 December 2024— Nepal's largest domestically funded hydropower project, the 456 MW Upper Tamakoshi Hydropower Plant, is in the final stages of repair after suffering significant damage from a landslide on September 28, 2024. Efforts are underway to resume partial electricity production by December 25, with full capacity expected to be restored by early February, according to project officials.
The landslide caused extensive damage to key infrastructure, including the left desander pond and the No. 46 transmission tower. While the transmission tower has already been reconstructed, repair work on the desander pond is nearing completion. "Once the left desander is fully repaired, we will begin water diversion from the dam to restart electricity generation," said Mohan Gautam, Chief Executive Officer of the Tamakoshi Hydropower Project.
Impact on Energy Production
The project, which plays a crucial role in Nepal's energy sector, has been offline since late September. Officials estimate that partial production of 125–130 MW will begin in December, though output may decrease in subsequent months due to reduced river flow. Full capacity production, targeting 456 MW during peak hours, is expected by the first week of February.
Challenges and Progress
The landslide also damaged the headworks control center, culverts, and sedimentation ponds. While temporary measures are being implemented to restore functionality, the rebuilding of permanent structures is expected to take several more months.
"In the short term, we will use available water flow for electricity production, gradually increasing output as repairs progress," said Purna Gopal Ranjit, project manager. "We are working tirelessly to ensure minimal delays."
Economic and Environmental Implications
The suspension of operations at Upper Tamakoshi has highlighted Nepal's reliance on domestic hydropower for energy security. With the plant capable of generating electricity worth NPR 40 million per day, the delay has added strain to the Nepal Electricity Authority (NEA), especially during the high-demand winter season.
Furthermore, the project’s temporary halt underscores the challenges posed by climate-induced disasters, such as landslides, to Nepal's hydropower sector. Experts suggest that incorporating disaster-resilient designs and mitigation measures in future projects will be critical.
Looking Ahead
As repairs near completion, officials remain optimistic about resuming full operations in early 2025. "Despite the challenges, we are committed to restoring full capacity and meeting the nation’s energy needs," said Gautam.
The Upper Tamakoshi Hydropower Project, a symbol of Nepal’s engineering and financial independence, once fully operational, will reaffirm its status as a backbone of the country’s energy infrastructure.
