Heavy machinery roars against a wall of thick mud deep inside the Himalayas. Rescuers are racing against time. Six workers remain trapped inside a blocked tunnel at Nepal's Chilime hydropower project, and every single second counts.
An ice-rock avalanche near the Nepal-Tibet border triggered catastrophic flash floods and mudslides across the northern and central districts. The rushing waters swallowed towns, roads, bridges, and hydropower facilities. Now, joint teams of the Nepali Army and Indian specialists are carving a path through thousands of tons of debris. They've cleared 70 metres of mud and rocks so far, but the underground powerhouse sits roughly 60 metres further down.
Pushing Through The Mud At Chilime
The logistics of an underground rescue operation are brutal. You can't just walk in with a shovel. Heavy equipment like excavators, loaders, and Bobcat units had to be hauled right into the narrow tunnel shafts.
India's Ambassador to Nepal, Naveen Srivastava, noted that engineering crews worked through the night to maintain momentum. The Border Roads Organisation and the Nepal Army spent days building access roads—including over a kilometer of freshly cut mountain track from Syafrubesi—just to get heavy gear close enough to the site.
Yet, the clock is ticking loudly.
Rescuers detected a pocket of air near where the trapped workers are believed to be sheltering. That spark of hope keeps teams moving forward. However, officials caution that an air pocket does not confirm anyone is still alive or that direct communication has been established.
The Broader Crisis Across Himalayan Hydropower Projects
This isn't an isolated incident. The August 26 disaster caused staggering devastation. Nearly 1,400 people lost their lives, and over 5,000 remain missing.
The roaring Bhotekoshi River carried massive debris miles downstream, wreaking havoc on multiple energy installations. Around 100 people are believed to be trapped across nearly a dozen different hydropower tunnels in the region.
At the Upper Trishuli-3B project site, more than 100 army personnel are working simultaneously, trying to clear blockages and reach other trapped individuals. Mountain rescue operations demand specialized engineering, precise mapping, and sheer physical endurance. When thousands of tons of compacted mud and rock seal an underground tunnel, standard rescue protocols fall apart. Crews have to shore up structural roofs constantly to prevent secondary cave-ins while digging out the victims.
What Happens Next
The immediate priority remains reaching the underground powerhouse at Chilime. If teams break through the remaining 60 metres of debris before air supplies run out, it will mark a major breakthrough in an otherwise grim disaster relief effort.
The ongoing crisis has also forced engineers and policymakers to rethink safety measures for remote mountain energy projects. Building critical infrastructure in fragile Himalayan zones requires better early warning systems and reinforced underground shelters.
Right now, though, all eyes remain fixed on the dark tunnel entrance in Rasuwa district, where heavy machines keep digging.
