NHPC - Incident at Teesta VI HE Project (500 MW), Sikkim

An unfortunate incident occurred at 1.04 P.M on July 20, 2026, inside the underconstruction Head Race Tunnel (HRT) of NHPC Teesta Stage VI Hydroelectric Project, Samardung, South Sikkim, after sudden burst of suspected methane gas trapped/embedded inside the rocks which led to explosion generating dense fumes and toxic gases.

Immediately, the project team activated its emergency response protocols. The project team is working in close coordination with the district administration, National Disaster Response Force (NDRF), State Disaster Response Force (SDRF), local authorities and other emergency agencies to support the ongoing rescue operations. In addition, a special rescue team from DG Mines-Safety has also reached the site for rescue operations. Our site engineering teams are working round-the-clock alongside the authorities to assist in stabilizing the tunnel environment and ensuring rescue.

NHPC's Top Management has reached the site and is closely coordinating with the rescue teams and local authorities. All possible efforts are being made for evacuation of the trapped personnel.

As per the latest information from site, 25 personnel were trapped inside the tunnel, out of which 10 casualties have been reported so far.

Detailed investigation will be undertaken to ascertain the cause of the incident. We remain committed and are extending full support to the rescue agencies and the affected families.

In this hour of grief, prayers of NHPC family are with the affected families during this difficult time.

Shares of NHPC Limited was last trading in BSE at Rs. 81.03 as compared to the previous close of Rs. 79.18. The total number of shares traded during the day was 421207 in over 3324 trades.

The stock hit an intraday high of Rs. 81.20 and intraday low of 78.75. The net turnover during the day was Rs. 33886686.00.

Source : Equity Bulls

Keywords

NHPC INE848E01016 TeestaVIHydroElectricProject Incident