Progress on Northeast Hydropower Projects: Subansiri Lower Unit Nears Completion

The Subansiri Lower Hydroelectric Project's fourth unit is nearing completion, promising to generate 1,000 MW of power soon. Other significant projects, including the Dibang and Lohit initiatives, are also progressing, though some face challenges. The full capacity of the Subansiri project aims for 2,000 MW by March 2027, while the Dibang project is set for completion by 2030. Learn more about these developments and their implications for the region's energy landscape.

By Narendra Chaudhary Apr 14, 2026, 15:35 IST

Advancements in Hydropower Development

A file image of Subansiri Lower Hydroelectric Project (SLHEP). (AT Photo)

Guwahati, Apr 13: The fourth unit of the Subansiri Lower Hydroelectric Project (SLHEP) is on the verge of completion, alongside several other significant hydropower initiatives in the Northeast, such as the Dibang project, which are at different stages of development.

According to official sources, the fourth unit of SLHEP is currently undergoing trials and is anticipated to be finalized shortly.

Once operational, this unit will contribute 1,000 MW of electricity, with the aim of reaching a total capacity of 2,000 MW by March 2027.

The Dibang Multipurpose Project, which is designed to have a capacity of 2,880 MW, is under construction and is expected to be completed by 2030, although potential delays have been acknowledged.

Additionally, preparations for the Subansiri Middle Hydroelectric Project, located on the Kamala river (a tributary of the Subansiri), are set to commence soon.

This project has obtained all necessary approvals, including investment clearance. While a specific completion date has not been established, it is projected to take around six to seven years to finish, with an expected output of 1,720 MW.

In another development, the Tehri Hydro Development Corporation Limited plans to initiate the Lohit hydropower project near the India–China border.

Despite having received the necessary clearances from the Central government, land acquisition remains a significant challenge, which is being managed by the Arunachal Pradesh government. Construction will begin once this process is finalized.

The tendering for the Lohit project has already started, with an estimated investment exceeding Rs 14,000 crore. This project will feature a run-of-the-river design, including a concrete gravity dam and an underground powerhouse.

However, the Subansiri Upper Hydroelectric Project, which is proposed to have a capacity of 1,650 MW, is still awaiting investment clearance from the Central government.