New Delhi, Sept. 1 -- More than 600 people employed at 11 hydropower project sites in Nepal's Rasuwa and Nuwakot districts remain missing or trapped inside collapsed tunnels and other infrastructure following the August 26 flash floods in the Himalayan nation, with rescue operations turning exceptionally grim with each passing day. Nepal's National Disaster Risk Reduction and Management Authority had estimated 639 people (as on 6pm on Monday) to be missing at these hydropower sites. People aware of the matter said most of those missing were employed at the Upper Trishuli 1 project in Rasuwa district, where around 570 people, including 49 Indians, are yet to be traced. On Monday, three people missing from this project site were rescued, officials said, adding none of them were trapped inside a tunnel. "Of these 570, there are at least 300 believed to be trapped in tunnels. The five firms employed in this project estimate that there were around 1,400 people working within the project that morning (August 26). The number keeps changing but at least 800 workers from here have survived," said an official, requesting anonymity. A 13-member Indian army team of tunnel rescue experts is working with Nepalese authorities in rescue operations. The official shared details of the rescue operations at tunnels. "At Chilime (eight missing), Indian technical team along with Nepalese army and authorities worked to open a route to a powerhouse tunnel. They reached 90 metres inside the 250-m tunnel but could not go inside. At Langtang Khola (41 missing), an inspection was conducted today (Monday) and work will begin on Tuesday," the official said. At Rasuwagai (93 missing), drones were used inside a tunnel but no bodies were found, while at Upper Trishuli 3A, where 42 are missing, one portion of the tunnel was opened after a crown blast, the official said. "Work is going on to clear the pile of stones and pathway inside." Vijay Prasad, a rigger from Bihar's Rohtas district, had a narrow escape at Upper Trishuli 1 site. "Some of us who were at a height saw a huge wave coming towards the dam. We knew it would break the dam so we jumped down and ran towards the opened mouth of the tunnel. The wave must have been 50-70m high," Prasad, who was among 150 survivors from the project, said upon reaching home on Sunday. "There were 7 South Korean nationals among the survivors while many are still trapped."...