According to the report of the Power Project Management Board 3 (EVNPMB3), in the first quarter of 2026, many critical path items of the Bac Ai Pumped Storage Hydropower Plant Project achieved positive results, contributing to the consolidation of overall progress. In the photo: representatives of EVNPMB3 and contractors reporting to EVN Vice President  Pham Hong Phuong (top row, second from right) on results of construction situation in first quarter.

Following that, the delegation inspected the construction progress at the project tunnels. In the photo: Inspection team checking excavation and reinforcement works of underground power plant.

Construction of underground powerhouse component was initiated on 22 January 2026

The construction and operation access and ventilation tunnels have achieved over 55% cumulative progress. Meanwhile, the downstream valve tower has completed open excavation works and is undergoing shotcrete reinforcement of slopes, reaching 24.3% of the first-quarter plan.

As of March 8, 2026, the contractor has completed the installation of the crushing plant equipment and is now carrying out material testing before commencing large-scale crushing and screening of aggregates for project supply. Accordingly, the excavated soil and rock will be transported to two crushing and screening plants to create crushed stone aggregate for road embankment construction, roadbeds in tunnels, and as material for spraying concrete to reinforce the slopes and tunnel arches. In the photo: Aggregate crushing and screening station No. 1.

Bac Ai pumped-storage hydropower work is not only an important energy project, but also brings many long-term economic, social, and environmental benefits.