August 31, 2026 — 6:55amBidur, Nepal: Dhan Bahadur Tamang arrived at work at 7.20am on Wednesday, stretched with his team, then headed down the tunnels for another day of building a hydropower plant designed to increase blackout-prone Nepal’s power generation by at least 20 per cent.The $900 million project, called Upper Trishuli-1, was almost finished. Then, in a matter of minutes, it was destroyed.Tunnel survivor Dhan Bahadur Tamang, right, speaks to women who are desperate to know the whereabouts of a missing loved one. Kate GeraghtyThe inland tsunami that had just wiped out entire villages upstream on Wednesday morning reached Trishuli-1 about 9am, as Tamang was inside an access tunnel. The water, he said, filled the tunnel so quickly and forcefully that it swept away machinery and vehicles.As he fought for his life, similar events were unfolding at other hydro-plants along the remote Bhote Koshi and Trishuli river corridors. An unknown number of workers have been killed, while hundreds of others remained trapped in the dark mountain tunnels with uncertain oxygen levels and little or no drinking water.Close to 350 people were rescued from a tunnel on Friday. Still, the Kathmandu Post, citing the government and an independent association, reported on Sunday that at least 897 were still unaccounted for across the region’s hydro projects.Dramatic rescue efforts were now unfolding at several plants. On Sunday night, rescuers had dug into the top of one of the tunnels where they believe dozens may be trapped, but had not yet entered.This masthead witnessed a small rescue team arriving on Saturday from China, a significant employer at the sites.Chinese rescuers, in orange, wait to board a helicopter at a Nepalese army post in Bidur.Kate GeraghtyTamang estimated he was swept as far as four kilometres through the tunnel until he was spat out alive into a newly formed body of water swirling with debris and equipment.When the water began to recede, he found his way to another tunnel.Residents look at a damaged tunnel of the Trishuli hydropower plant on Sunday.Getty Images“I saw many dead bodies inside that tunnel,” he said. “I had to step over some of those bodies in order to escape and be here today.”Tamang spoke to this masthead only moments after a helicopter had delivered him and three other survivors to the town of Bidur, where an army post had been transformed into an aerial operations centre and chaotic receiving ground for people rescued from across the impact zone.Although he was walking with a stick, he and the others had escaped serious injuries.Two women rushed over while the men slowly walked to a waiting vehicle, begging for information about a loved one, also a hydro worker. Tamang studied the photo and told the women that he knew of the missing man, but did not know if he was alive.The death toll from Nepal’s catastrophic floods was nearing 800 by Sunday night (Nepal time). With more than 2500 people missing, 42 Australians among them, the number was expected to soar.Chinese authorities, meanwhile, said 546 people were unaccounted for, including 261 foreigners from 23 nations, on the Tibet side of the border.When the humanitarian needs ease or become obsolete, Nepal, a landlocked, developing nation, must reckon with the decimation of electricity-generating infrastructure.More than a dozen of its hydro plants, including some in development, like the Upper Trishuli-1, might have been impacted or ruined, crushing hopes of harnessing the Himalayan snow to produce enough electricity to power itself and others.Tamang’s Upper Trishuli-1, which had strong investment from South Korea, was Nepal’s largest ever foreign direct investment project.Zach Hope is South-East Asia correspondent. He is a former reporter at the Brisbane Times.Connect via email.From our partners