Recently, Sinohydro Bureau 4 Co., Ltd. won the bid for the construction project of the caverns and some roads during the preparatory period of the Gansu Huanglong Pumped Storage Power Station project.

The Gansu Huanglong Pumped Storage Power Station project is a key implementation project of the 14th Five-Year Plan in the "National Medium- and Long-Term Development Plan for Pumped Storage (2021-2035)" and a medium- and long-term construction project in the "14th Five-Year Plan Energy Development Plan of Gansu Province." It is also the largest pumped storage power station currently under construction in Gansu Province.

The project is located in Tianshui City, Gansu Province, on the left bank of the Weihe River. The power station has an installed capacity of 2,100 MW and is equipped with 6 vertical-shaft, single-stage, single-speed Francis reversible pump-turbine units with a unit capacity of 350 MW each. The rated head is 645 meters, the head-to-length ratio is 3.05, and the continuous full-load operating hours are 6 hours. The hub works mainly consist of the upper reservoir, water conveyance system, underground powerhouse and switch station, lower reservoir, water release and replenishment structures, etc. The total construction period of the project is 78 months.

The construction project of the caverns and some roads during the preparatory period of the Huanglong Pumped Storage Power Station includes: the access tunnel to the powerhouse and related caverns, the ventilation and safety tunnel and related caverns, the access road to the powerhouse tunnel, the temporary road to the ventilation and safety tunnel, the cavern wastewater treatment system, the construction site for this section, the site leveling works in the lower reservoir area (site leveling for the lower reservoir transfer stockyard, aggregate system, and concrete system), the contractor camp for this section, construction access roads, the wastewater treatment system for the construction site and construction camp, the primary electrical works for this section, the safety monitoring works for this section, and the soil and water conservation engineering measures for this section.

It is reported that the Gansu Huanglong Pumped Storage Power Station is expected to start generating electricity in 2029 and achieve full power generation in 2030. After the project is completed and put into operation, it will improve the peak-shaving capacity and rapid response capability of the Gansu power grid, further improve the quality of power supply, maintain the safe, stable, and economical operation of the power grid, and undertake tasks such as peak shaving, valley filling, energy storage, frequency regulation, phase modulation, and reserve in the system, helping to achieve the "dual carbon" goals. In addition, the project is expected to provide more than 3,000 jobs, which will effectively help local people find employment and increase their incomes, while also driving the development of the local building materials and service industry markets.