India has approved plans to build the country's largest hydropower project in the state of Arunachal Pradesh. The $3.9 billion scheme will be built on the Dibang River, a tributary of the Brahmaputra River in the mountainous northeast of the country. When completed in 2028, it will generate up to 2.9GW of electricity through 12 turbines and will also moderate flooding during India's monsoon season.

The project was conceived in the early 1980s. In January 2004, approval was given to clear a 54 square kilometer site in the village of Munli in the Lower Dibang Valley. The government subsequently approved $186 million in planning and preparation investments in July 2019.

The barrier will be a concrete gravity dam at 278 meters high and 375 meters long, which will be the tallest dam of its kind in India. This will create a 43km long reservoir with a total storage capacity of 3.85 billion cubic metres.

The chief consultant of the program is AFRY, a Swedish design engineer. It carried out detailed project reports, geotechnical assessments of future dam foundations, and construction and project management planning.Editor/XingWentao