GUWAHATI

One of the eight units of India’s largest hydropower project, which straddles the Arunachal Pradesh-Assam border, has begun undergoing a test run, signalling its commissioning soon.

Officials of the NHPC Limited said the wet commissioning of the first 250 megawatt unit of the 2,000 MW Subansiri Lower Hydroelectric Project was commenced on Friday (October 24, 2025).

“Wet commissioning is basically a test run of the turbine to check several parameters without generating electricity. The test run with water flow may take four to five days,” an NHPC spokesperson told The Hindu on Saturday (October 25).

The Subansiri Lower project has eight units of 250 MW each. “Four of these units are ready for test runs. The next step involves synchronisation of at least two units for the pr

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