Bảo Nhai 1 Hydropower Project (Bắc Hà District, Lào Cai Province) is a dam-integrated hydropower plant on the Chảy River, designed directly by VCE. The project was completed and began generating electricity in 2024. Numerous karst cavities in the foundation made seepage-control drilling and grouting particularly difficult and complex.
The reservoir has a storage capacity of approximately 2.8 million m³, impounded by a concrete gravity dam approximately 26 m high. The spillway has 06 gated bays, each 14 m wide. The powerhouse contains 02 bulb turbine units (Capsule), with a total installed capacity of 14 MW and average annual generation of 49.4 million kWh. Rated head: Htt = 6.2 m; rated discharge through the generating units: Qmax = 258 m³/s. A 35 kV GIS substation at the plant connects to the Bảo Nhai 110 kV collector substation via a 9 km, 35 kV transmission line.
Contracting entity: Cty CP Xây dựng và Thương mại 299
Contract Nos.: 01/HĐKT-BN2 dated 12/12/2017 and 03/HĐKT-BN2 dated 25/4/2018
Scope of work: Preparation of planning amendment and supplementary documentation, feasibility study, technical design and shop drawings. Preparation of bidding documents for the electromechanical and hydromechanical equipment package. Design of the 35 kV transmission line and substation.
