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, offi...