Specialized Indian subterranean rescue specialists and engineering teams penetrated deep into damaged tunnel complexes at the Chilime and Langtang hydroelectric projects in northern Nepal following destructive flash floods.
The rescue mission, conducted in direct coordination with the Nepali Army and district disaster authorities, focused on clearing heavy mud, boulders, and debris from waterlogged headrace tunnels and subterranean powerhouses. Heavy monsoonal cloudbursts had triggered massive rockslides that swept into intake gates, trapping maintenance workers and submerging critical generation machinery beneath meters of sludge. Rescue personnel utilized specialized acoustic listening devices, structural integrity cameras, and heavy hydraulic dewatering pumps to navigate submerged galleries.
Engineers and disaster personnel worked under challenging subterranean conditions, navigating confined spaces threatened by lingering toxic gases and structural fractures. The joint teams established ventilation systems and reinforced compromised tunnel walls to ensure safety during ongoing search operations.
Disaster officials indicated that structural evaluations will continue as water levels recede, with priority placed on accounting for missing project staff and assessing the feasibility of restoring essential power generation infrastructure.
Engineers highlighted that the Chilime and Langtang hydroelectric projects represent key generation assets feeding regional transmission grids in Rasuwa district. The joint inspection operations assessed sediment buildup, penstock pipe deformations, and electrical turbine damage, providing critical engineering assessments necessary for planning long-term structural restoration and safety retrofits.
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Sources:
https://www.thehindu.com/news/top-news-of-the-day-september-01-2026/article71415031.ece