KATHMANDU, August 20: The Upper Tamakoshi Hydropower Project has connected 456 MW of electricity generated from all its six units to the national transmission line from August 17. Chief Executive Officer of Upper Tamakoshi Hydropower Company Limited, Bigyan Raj Shrestha, said that the electricity generated from all the six units of the project has been connected to the national grid. "So far, commercial production has been started from four of the six units," he said. "The remaining two units will start commercial production within the next 15 days."