“The commissioning of the Subansiri Lower Hydro Electric Project (SLHEP) has been further delayed till May 2026” NHPC has now acknowledged. In a report filed by PTI, the project developer has acknowledged on June 12 2025 that the controversial 2000 MW Hydropower project on Subansiri River in Brahmaputra basin on Assam-Arunachal border “has suffered “minor damages” during the recent monsoon rains”. The suggestion that the damages were minor may not be accurate considering the consequences of project delay.
Continue reading “Subansiri Lower HEP faces damages in 2025 like in every year since 2019”Tag: Assam
Dams, Rivers & People: June 9 2025: The Myths around Brahmaputra River
The Brahmaputra is believed to have two mythological fathers – Lord Brahma and sage Shantanu. In the 16th-century text Yogini Tantra, dedicated to the worship of goddesses like Kali and Kamakhya, the river is linked to an ancient ablution ritual with the following invocation:
O Son of Brahma! O Son of Shantanu! O Lohit! O Son of Lohit!
I bow before you, wash away my sins of the last three births.
High Rainfall days in India’s districts in SW Monsoon 2024
An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for India’s South West Monsoon 2023 shows that there were 2176 instances when a district rainfall of a day was above 50 mm. Such high rainfall instances included 1759 instances when rainfall was 50-100 mm, 329 instances when it was 100-150 mm, 64 times it was 150-200 mm and 24 times above 200 mm. Out of 717 districts of India, 531 districts or, about 74% of the districts experienced such high rainfall days during SW monsoon 2023.
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Massive Landslide AGAIN damages Lower Subansiri Hydro Project in Oct 2023
Once again, after several such incidents in the past, the controversial 2000 MW Lower Subansiri Hydropower project on Assam Arunachal Border was hit by a massive landslide at around 11.30 am on Oct 27 2023. The landslide damaged the project, further delaying the commissioning of the first unit, increasing the cost and time over runs of the expensive, much delayed project. Following the landslide, the only functioning diversion tunnel no 1 of the project, about 200 m upstream from the dam was blocked. The river water, about 997 cumecs (cubic meters per second) suddenly started flowing towards the dam, where the spillway gates were still under installation, yet to be tested. The water could overflow from the under construction spillway gates once the reservoir reached 145 meters level (above Mean Sea Level). The massive, majestic Subansiri river was completely without any flow till the river water started flowing through the spillway gates about twelve hours later. (Feature photo above shows the snapshot when landslide started and in the foreground, water is seen rushing towards the dam)
Assam Rajya Sabha MP Ajeet Bhuyan, referring to the October 27 landslide said in his letter to Prime Minister that the incident is only a warning, which can’t be ignored: “The hilly soil of Arunachal is fragile. Secondly, the dam site is earthquake-prone. Thirdly, the base of the dam was reduced by 09 metres without any public explanation. These are enough indications for a major disaster in the coming days”. On Oct 31 2023, he appealed to PM to take swift measures and fix accountability. He reminded PM that Mr Modi himself had said in 2014 no big dams in North East if people do not want. He also reminded that current Defense Minister Rajnath Singh had also said they will scrap the project. Mr Bhuyan said that he apprehended much bigger disaster than recent Sikkim Disaster if this projects goes ahead.
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Rivers Breaching High Flood Level in June 2023
In the first month of South West (SW) monsoon season June 2023, there have been Highest Flood Level (HFL) breach incidents at two sites. Both of these sites namely Suklai on Suklai river and DRF on Puthimari river are level monitoring sites located in Baksa district of Assam in Brahmaputra basin.
Interestingly, the old HFL at both sites were attained in 2020 and 2022 only and the old HFLs were breached thrice between June 15 and 20, 2023. The details of old and new HFLs for these sites are given in table below.
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From River to Cup: History of Assam’s Tea Plantations and the role of Brahmaputra
Guest article by Anantaa Ghosh
[Feature image above: A NASA Earth Observatory image by Lauren Dauphin]
Author’s note: In this article, I have taken grammatical liberties by omitting the use of ‘the’ before a river’s name and ‘it’ when referring to them. I firmly believe that reimagining and re-understanding rivers necessitate a profound change that extends to our lexicon as well. Consequently, I am deliberately employing the pronoun ‘they’ to refer to Brahmaputra and all the rivers mentioned herein, rather than ‘it’ which may reduce the river to an object. I also refrain from using ‘he’ or ‘she’ (as per Indian mythology) as these pronouns tend to impose a mythological identity as the sole identity of a river,, negating the multifaceted nature and diverse forms of identity that a river has.
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Repeated Disasters at Subansiri Hydro project in 2022
(Feature Image: Massive landslide at Lower Subansiri hydro project dam site. Source North East Now 28 Oct. 2022)
Over the course of past two years, series of disasters and accidents have taken place at construction site of the controversial 2000 MW Lower Subansiri Hydro Power Project resulting in damages to project structure and death of construction workers thus raising questions over its safety and sustainability. Since 2005-06, the largest ever under-construction hydropower project is being developed by NHPLC Ltd (formerly known as the National Hydro Power Corporation Limited), a central government company in geologically fragile, seismically vulnerable and biodiversity rich area in the face of pending judicial case[i] and very strong opposition from people across the Assam.
The latest disaster in form of a massive landslide affected the project site on October 12, 2022 further delaying the repair works which were being carried to recover damages caused by the flash floods, landslips at dam site in last week of September 2022.
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June 2022: District wise rainfall in India’s SW Monsoon
In the just concluded month June 2022, the first month of India’s South West 2022 monsoon, India received 152.3 mm rainfall, 8% below the normal June rainfall of 165.3 mm as per India Meteorological department. In June 2021, the rainfall was 182.9 mm[i], about 11% above normal and in June 2020, the rainfall was 196.9 mm, or about 18% above normal and in June 2019 it was 33% below normal.
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June July 2021 District Wise SW Monsoon Rainfall in India
In the just concluded month of July 2021, India received 266.1 mm rainfall, that is 6.73% below normal July rainfall of 285.3 mm, as per India Meteorological Department (IMD). This is in contrast with June 2021 rainfall, that was almost 11% surplus over Normal rainfall. Not only that surplus has been wiped out by the July 2021 deficit, the overall June July 2021 rainfall now is 449 mm, or about 0.7% below normal rainfall of 452.2 mm, as per IMD.
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June 2021: District wise rainfall in India’s SW Monsoon
In the just concluded June 2021, the first month of India’s South West 2021 monsoon, India received 182.9 mm rainfall, 10.96% or about 11% more than the normal June rainfall of 166.9 mm as per India Meteorological department. In June 2020, the rainfall was 196.9 mm, or about 18% above normal and in June 2019 it was 33% below normal.
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SANDRP 