Huoi Quang Hydropower Plant is located in Khoen On Commune, Than Uyen District, Lai Chau Province, a factory located in Chieng Lao Commune, Muong La District, Son La Province. This is the first underground power plant designed by Vietnam, constructed with 2 underground tunnels in the mountain, each tunnel is 4.2km in length, diameter 7.5m, generators located in the mountain. This is also one of the big projects under hydropower ladder planning on the Da river system, after Son La hydropower plants (2.400 MW), Hoa Binh hydropower plant (1,920 MW) and Lai Chau Hydropower Plant (1,200 MW) . Total investment of the project is 11,082 billion dong.

Huoi Quang Hydropower reservoir has a capacity of 184.2 million m³, the tallest concrete dam with a height of 104m; Flood drainage project includes 6 sluice gates; Hydropower plant consists of 2 units with installed capacity of 2x260MW, the average annual power is 1.904 billion kWh.

Mr. Vu Ngoc Phan, Deputy Director in charge of Hydropower Project Management Board 1 (Electricity of Vietnam Group) said: "This is the crane is localized over 90% and has more superior features than a same type of crane produced by foreign countries. This localization is a stepping stone in the field of steel structure design and hoisting in the power industry. "(Source: Tien Phong)