THDC Pipalkoti Tunnel: Inquiry After 3 Workers Missing

Incident Overview

An under-construction THDC India Limited tunnel at Pipalkoti in Uttarakhand’s Chamoli district became the latest flashpoint for Himalayan underground execution risk on August 14.

A landslide-like surge near the Birhi River pushed water and debris into the working face. Of the 22 workers on duty, 12 were rescued, seven bodies were recovered, and three remain missing.

Rescue operations continue through flooded, sludge-filled stretches, with multiple agencies deployed:

- National Disaster Response Force (NDRF)
- State Disaster Response Force (SDRF)
- District Disaster Response Force (DDRF)
- Indo-Tibetan Border Police (ITBP)

Official Inquiry and Safety Response

Uttarakhand Chief Minister Pushkar Singh Dhami has ordered a magisterial inquiry into the cause of the surge and directed that personnel safety be treated as the top priority “at any cost.”

The inquiry will determine whether the incident reflects a geological event beyond design assumptions or a failure in monitoring, dewatering, or emergency egress planning.

For THDC India Limited — the project owner and a Schedule A Mini Ratna joint venture of the Government of India and the Government of Uttar Pradesh — the episode lands against a backdrop of recurring tunnel disruption across the Alaknanda basin, including the 444 MW Vishnugad Pipalkoti Hydro Electric Project.

Commercial and Sector Implications

Commercially, the implications extend beyond the immediate rescue.

Underground hydro contracts in the Himalayan belt already carry elevated geological uncertainty.

Repeated incidents — including the 2021 Tapovan Chamoli flood and the 2023 Silkyara tunnel collapse — are hardening the case for stronger contractual and technical safeguards, including:

- Higher risk premiums
- Denser geotechnical instrumentation
- More prescriptive emergency response clauses

Contractors and insurers are likely to reassess assumptions on water ingress, mucking logistics, and secondary escape routes.

The signal for the sector is that safety and geological risk are moving from compliance checkboxes to binding commercial variables.

For THDC India Limited, the magisterial findings will shape not only this tunnel’s recovery schedule but also the credibility of its remaining execution pipeline in the region.