Nov. 22, 2017 -- Construction of a large hydropower station on the upper section of the Yangtze River, the Suwalong project, is going smoothly, local authorities said Tuesday.

On Tuesday, the sluice gate on the Jinsha River was closed in preparation for further building work.

The Suwalong project is located at the junction of Mangkam County of Tibet Autonomous Region and Batang County of Sichuan Province, in southwest China. It will be the largest power station in Tibet upon completion.

With a total cost of nearly 18 billion yuan (2.77 billion U.S. dollars), the station is undertaken by China Huadian Corp.

A total of 1,462 people need to be relocated for the project, and 631 of them have moved, said Hu Guiliang, chairman of Huadian Jinsha River Upstream Hydropower Development Co., Ltd.

The power station has a designed capacity of 1.2 million kilowatts and will be able to generate about 5.4 billion kwh of electricity per year.

A 112-meter-high dam will be built to form a reservoir that can store about 674 million cubic meters of water. Generators are expected to start operations in 2021.

Suwalong project is a major project to send electricity from the west to eastern areas in China, said Wang Zhengtao, director of Qamdo City resources development and relocation bureau.

It will green the energy structure and raise incomes for local residents, Wang said.