Final 250 Meters of Vietnam Hydropower Tunnel Completed by Drill and Blast
The Thượng Kon Tum hydropower project in Vietnam has a water conveyance tunnel more than 17 kilometers long. A collapse in the fourth quarter of 2018 stopped its tunnel boring machine about 250 meters from the connection point. The remaining section was completed by drill and blast in the fourth quarter of 2019. The project connected to the national grid in 2021.
