Tungabhadra Dam: A Crest Gate washed away in August 2024

August 11, 2024September 6, 2024 SANDRP3 Comments

In a major dam related disaster at around 10.50 pm on Aug 10, 2024 [i], one of the crest gates at the Tungabhadra dam has broken [ii] near Hospete in Vijayanagara district in Karnataka, causing the release of 70,000 to 100,000 cusecs of stored water. The chain on the 19^th (of total 33 gates) gate of Tungabhadra dam on Tungabhadra river, part of Krishna River Basin, got cut, snapped and was washed away about 100 m from the dam on Saturday. The chain that was used to operate the gate snapped as the welding gave way. The Tungabhadra gates only have chain and not chain and rope as in some other dams. The force of the water in the dam swept the 60-foot-by-20-foot gate, weighing around 20 tonnes, some 500 ft away, J Purushottham, president of the Tungabhadra Farmers’Association, said. This possibly happened due to heavy flows, but also due to wear and tear of over 70 years of operation of the dam. A temporary stop log gate is now being planned, as permanent crest gate will take time.

The disaster raises a number of questions about the operation and maintenance of the dam.

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Hydro Disaster

July 2024: USDMA Clueless on Flashflood Disaster at Vishnugad Pipalkoti HEP

July 18, 2024July 19, 2024 SANDRPLeave a comment

(Feature Image: Screenshot of social media video showing flash flood imapct at HCC’s batching plant during intervening night of July 15-16, 2024.)

The batching plant at the controversial under construction Vishnugad Pipalkoti Hydro Electric Power (HEP) project site in Uttarakhand has suffered significant damages due to a flash flood incident during the intervening night of July 15-16, 2024. The plant belongs to the Hindustan Construction Company (HCC) and has been set up by the Alaknanda river downstream the dam of 444 Mw HEP project adjacent to it dumping yard at Gulabkoti in Helang area of Joshimath tehsil in Chamoli district.

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Dam Disaster

May 2024: Questions about NDSA interim report on Kaleshwaram Dam Disaster

May 8, 2024May 9, 2024 SANDRPLeave a comment

The National Dam Safety Authority (NDSA) Chairman Shri Anil Jain has through a letter dated May 1, 2024, sent an interim report of the NDSA committee to the Telangana govt. The 16 page interim report titled: “RECOMMENDATIONS ON THE INTERIM MEASURES AND FURTHER STUDIES/INVESTIGATIONS TO BE TAKEN UP BY IRRIGATION & CAD DEPARTMENT, BEFORE THE ONSET OF COMING MONSOON” came as an annexure to the letter addressed to Rahul Bojja, Irrigation and Command Area Department (I & CAD) of Govt of Telangana.

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Dam Safety

2023: Safety & Sustainability Concerns On Dams & Hydro Power Projects in India

January 3, 2024January 3, 2024 SANDRPLeave a comment

(Feature Image: Drone image from the site of the Teesta III dam in Sikkim, looking towards Chungthang town. Image by Praful Rao of Save the Hills, Source: The Landslide Blog by Dave Petley.)

In this fourth part of annual overview, SANDRP compiles the issues affecting the safety and sustainability of dams and hydro power projects in India during 2023. The report starts with governance and management issues of dams and hydro power projects as highlighted in our weekly Dams, Rivers & People News Bulletin (DRP NB) and blogs all through the year amid rising concerns and disasters on these structures across the country. It then covers some relevant judicial interventions and governments decisions on the issue.

Please also see part one of the series compiling dams and hydro projects related disasters in India in 2023; part two on peoples resistance against destructive dams and hydro projects, part three on dam induced flood incidents in 2023. In the fifth and final part, we have tracked the important dams and hydro projects related decisions taken by Expert Appraisal Committee (EAC) and Forest Advisory Committee (FAC) during 2023.

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Hydro Disaster

2023: Accidents & Damages to Hydro, Dam Projects in India

December 11, 2023 SANDRPLeave a comment

(Feature Image: The damaged Chungthang dam on Teesta river in North Sikkim. Source: The Telegraph)

This annual overview compiles the incidents of accidents and disasters that have caused significant damages to the hydro power and dam projects and around them in India during 2023. The report also highlights the incidents of violations of environmental norms at some under construction project sites which could result in manmade disaster in future.

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DRP News Bulletin

DRP 131123: Another Himalayan Disaster: 40 workers trapped in a tunnel in Uttarakhand

November 13, 2023February 27, 2026 SANDRPLeave a comment

(Ongoing rescue work inside Badkot-Silkyara tunnel in Uttarkashi. Image Source: HT)

In yet another disaster in the Himalayas, at least 40 workers are trapped in an under-construction tunnel being constructed by National Highways & Infrastructure Development Corporation Ltd. (NHIDCL), among others. The Hindustan Times has wrongly named the construction company as Hydroelectricity Investment & Development Company Limited (HIDCL) possibly of Nepal govt. Some people at the location have informed us that it may take another day before the workers are rescued.

NHIDCL was not even sure of the total of number of workers, as they gave the number as 36, which was corrected by the district administration later on to 40. It is also strange to see the work going on even on a Diwali day. Another disturbing aspect is that all the workers are reportedly mostly from outside Uttarakhand, when Uttarakhand villagers are known to migrate in large numbers to outside the state for employment. This disaster thus raises a lot of questions, which will need answers once the workers are rescued safely. The workers are still trapped over 30 hours after the disaster. The work at the 4.5 km long tunnel is being built under Char Dham Road Widening project since over 4 years, and violations have been happening in the work since then, as we reported in 2019.

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Dam Disaster

Massive Landslide AGAIN damages Lower Subansiri Hydro Project in Oct 2023

October 28, 2023November 8, 2023 SANDRPLeave a comment

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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Dam Disaster

Medigadda dam of Kaleshwaram project in Telangana damaged in Oct 2023

October 24, 2023November 3, 2023 SANDRP1 Comment

A portion of the Lakshmi (Medigadda) barrage on Godavari river on Telangana-Maharashtra border, part of the Kaleshwaram Lift Irrigation Project (KLIP) in Telangana’s Jayashankar Bhupalpally district[i] caved in on Oct 21 2023, Saturday night with a loud sound. The incident led to the temporary closure of the bridge of the barrage across the Godavari River that links Telangana’s Mahadevpur mandal with Maharashtra’s Gadchiroli district. The KLIP is the world’s largest Lift Irrigation Project, possibly the costliest, with expenses already above Rs 1 lakh crore. The Union Govt, recognising this as a major dam failure under para 8 of Schedule II of Dam Safety Act 2021, has promptly sent a team of six experts to assess the damage.

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DRP News Bulletin

DRP 231023: Need to be a little serious about Dam Safety, Flood Forecasting, Use of Early Warnings

October 23, 2023February 27, 2026 SANDRPLeave a comment

(Feature Image: Landslide warning board at Lakhwar dam site on Yamuna river. SANDRP, June 2015)

India need to relook the Dam Safety Act Experts say the Sikkim incident exemplifies blind spots in both legislation and implementation. The DSA does not promote risk-based decision-making and fails to incentivise transparency. Himanshu Thakkar, an environmental activist and coordinator of South Asia Network on Dams, Rivers and People, says that the frequency and scale of such disasters reveal a pattern of neglect: “It keeps happening regularly, people face disastrous consequences and we call these ‘natural disasters’. But there’s nothing natural about them.”

A robust DSA should allow different stakeholders to access information easily, but India’s framework falls short. “Dam safety is a public purpose function. Everything about dam safety, functions of all the institutions and committees and authorities, their reports, decisions minutes and agendas, everything should be promptly available to the public,” says Mr. Thakkar. “But nothing is in the public domain.” He adds that transparency is further obstructed when national and State bodies comprise government employees and engineers who worked on these projects, compromising objective decision making and lacking “people with a proven track record of taking independent decisions.”

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DRP News Bulletin

DRP 161023: Kaddam Dam Rehabilitation in Telangana: Many more will need this

October 16, 2023February 27, 2026 SANDRP1 Comment

(Kaddam dam spilling over with flood waters in July 2023. Image Source: SM)

Telangana’s Kaddam Dam, built with inadequate spillway capacity, has seen multiple threats and disasters over the years, starting from the very first year after its commissioning in 1958. The dam again saw threat of being washed away during monsoon this year. The Telangana government has decided to rehabilitate the dam at a cost of Rs 640-700 Cr, by reconstruction of spillway and installation of new gates. We hope the new spillway capacity will be in line with the changed monsoon rainfall pattern and will be able to take care of the higher probable maximum precipitation and higher probable maximum flood. Though we are unlikely to get to know how this is going to happen, as the standard operating procedure of all dam owners in India is secrecy rather than transparency even in dam safety aspects. One also hopes this is done at the earliest, and till that is achieved, the dam rule curve will be changed to ensure the dam does not face disastrous situations during monsoon.

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