In the morning of March 31st, 2017 at Da Nhim hydropower Plant Expansion Project, Ninh Son district, Ninh Thuan province, the TBM 390E successfully performed the first meters of boring and on April 01st, 2017, the TBM officially started boring the 5-kilometer-long headrace tunnel. This is a modern tunnel boring machine invested and operated by Construction Joint Stock Company 47 at Da Nhim Hydropower Plant Expansion Project.