EVN Vice President Pham Hong Phuong inspects progress of Bac Ai Pumped-Storage Hydropower Plant Project
On the morning of September 29, EVN Vice President Pham Hong Phuong and a delegation from Vietnam Electricity (EVN) inspected the construction site of the Bac Ai Pumped-Storage Hydropower Plant Project in Bac Ai Tay Commune, Khanh Hoa Province.
The site inspection was conducted as part of the project’s third-quarter 2026 coordination meeting. In the photo: Delegation inspects construction at VH3A access tunnel.
Since mid-March 2026, the VH3A tunnel has encountered a Grade IV geological fault zone. This is a highly complex geological condition in which the rock mass is heavily fractured, deformed, crushed or transformed into characteristic rock types under intense friction and pressure generated by movements of the Earth’s crust. In the photo: Inspection of construction inside VH3A tunnel.
A drilling machine is used to install support frames and apply shotcrete to reinforce the tunnel crown during construction of the section of the VH3A tunnel passing through the geological fault zone.
Steel support frames are used to reinforce and stabilize the tunnel crown during construction of the VH3A tunnel. The frames are custom-fabricated to match the dimensions and shape of the tunnel cross-section.
One of the major construction challenges in recent months has been heavy rainfall occurring almost daily, significantly affecting the access road serving construction activities. The crushed-stone base layer laid by the contractor has been repeatedly washed away by the heavy rain, leaving many sections muddy and potholed and causing difficulties for the transport of materials and equipment as well as personnel movement.
The access road to the construction site passes by Song Cai Reservoir, which will directly supply water for the closed-loop operating cycle of the Bac Ai Pumped-Storage Hydropower Plant once it enters operation.
EVN.COM.VN
(https://en.evn.com.vn/d/en-US/news-gallery/EVN-Vice-President-Pham-Hong-Phuong-inspects-progress-of-Bac-Ai-Pumped-Storage-Hydropower-Plant-Project-60-165-501702)
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Bac Ai Pumped Storage Hydropower Plant Project, Khanh Hoa Province:
- Investor: Vietnam Electricity;
- Investor’s representative for project management and operation: Power Project Management Board 3;
- Project engineering consultant: Power Engineering Consulting Joint Stock Company 4 (PECC4);
- Construction location: Bac Ai Tay commune, Khanh Hoa province;
- Total capacity: 1,200MW;
- Total investment: Over 21,101 billion VND;
- Construction commencement: February 2025;
- Planned schedule: Unit No. 01 to generate electricity in December 2029, Unit No. 02 in April 2030, Unit No. 03 in August 2030, Unit No. 04 in December 2030.
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