Dam Decommissioning · Dam Safety

दुनिया भर में बांधों को हटाने में वृद्धि

हिमांशु ठक्कर

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Dam Safety

Dam Safety Panel report of Medigadda Dam Disaster indicts Telangana, L&T and Dam Safety in India

The Dam Safety Panel from Union Ministry of Jal Shakti has submitted its report on Nov 1, 2023, which says the disaster at the Medigadda Dam occurred “due to a combination of issues involving planning, design, quality control and Operation and maintenance” of the Dam. The report concludes: “The barrage under the present condition is rendered useless until fully rehabilitated.”

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Dam Safety

Dam Safety Act & the role of Dams in the 2023 HP Floods

In order to have high standards of dam safety the prerequisites are designing and constructing dams with reasonable safety margins; operating and maintaining them safely; and having emergency arrangements to address situations that might arise. Operation of dam within its ambit also includes thorough understanding of likely impacts and its management in case of flooding, in any emergency situation or in the event of dam failure, both upstream and downstream on communities living there, their livelihoods and also on infrastructure and property which can get affected. In fact in many countries like Sweden and in many states of the USA, a dam is assigned a dam safety class i.e. A, B or C depending upon the significance of the damage that might occur in case of dam failure, class A being assigned to dams whose failure might cause significance loss of public life and property. Dam safety requirements are calibrated accordingly and a higher burden is put on dam owners of higher class, concerning safety management system, emergency plans, overall assessments, and annual dam safety reporting.

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Dam Safety

2022: Growing Concerns over Dam Safety, Sustainability & Impacts

(Feature image: Breach in Karam dam, MP in Aug. 2022. Dainik Jagran)

This annual overview is focused on issues concerning structural and operational safety of dams that arose in 2022. It includes issues related to how climatic threats and siltation is making the large dams unsustainable. It also highlights the impacts of dams on river eco-system and riverine people amid some corrective measures being taken by the various state and central governments including the formation of National Dam Safety Authority.

Please see for links to SANDRP’s analysis on the issues in 2022 in India covering: (1) Dam induced floods, (2) Dam safety and related issues of Polavaram project, (3) Disasters and accidents caused by hydro power projects in Himalayan states, (4) Growing and ongoing resistance against destructive dams and hydro projects, (5) Fly ash dam breaches.

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Dam Disaster · Dam Safety

Mahim Kelwa Dam leakage in Maharashtra: Another case of negligence

Heavy water leakage has been detected from the Mahim-Kelwa dam at Zanjroli in Palghar district, Maharashtra causing danger to a few villages situated downstream, officials said on Saturday, Jan 8, 2022.[i] A massive three-metre breach was detected on Saturday morning in a 41-year-old earthen dam with a 3.34 Million Cubic Meters capacity at Zanzorli in Palghar.[ii] About 1200 litres per minute was being discharged downstream.

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Dam Safety

Tamil Nadu: Thalavanur check dam collapsed twice within a year

Thalavanur check dam collapsed[i] in morning hours of November 9, 2021. This is the second time the check dam has faced significant damages within a year of its construction. Before this, the same check dam broke down in January, 2021. The first collapse took place 5 months after its inauguration on September 19, 2020. Its construction was started in April 2019.

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Dam Safety

Uttarakhand: Aging Bhimtal Dam Raising Serious Safety Concerns

(Feature image: Arial view of Bhimtal Lake and dam. Source:- Postoast.com)

All is not well with Bhimtal dam in Nainital district, Uttarakhand. On March 8, 2021 morning, the fillers from its protection wall wobbled out. It sparked panic among local residents living near the largest lake of Kumaon region. For past couple of years they have been concerned about the structural safety of the aging dam. The 138 years old dam has already been in news for vertical cracks and recurring seepages.

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Dam Safety · Disasters

A tale of two dam breaches: Spencer (USA) and Tiware (India)

On March 14, 2019 the Spencer dam on Niobrara river, located south of Spencer in Nebraska state in USA breached, killing four people in the downstream. The Investigation Report about the disaster has been made public now on April 24, 2020. The remains of Spencer Dam — a skeleton of concrete and steel amid a sea of sand — became one of the iconic images of the March 2019 “bomb cyclone” flood that caused billions of dollars in damage across Nebraska.

Less than four months later, on July 2, 2019, Tiware dam breached[i] in Chiplun taluka of Ratnagiri district of Maharashtra, killing 23 people. The then Maharashtra Chief Minister Devendra Fadnavis on July 6, 2019 announced a Special Investigation Team (SIT) to probe into the disaster, the SIT was to submit a report in two months, but the report was submitted in January 2020, but the report is not in public domain. When SANDRP talked with the chairman of the committee, he disclosed that the report has been submitted to the department in early Feb 2020 and it can only be made public by the department once they accept the report. He revealed that the SIT had found that there were issues with material of construction (masonry in place of Concrete) and design of the conduit of the dam. He agreed that the report should be made public promptly, but expressed his helplessness in face of the norms in India. SANDRP also called Secretary, Department of Water Conservation, Govt of Maharashtra, but got no response.

There is a lot to learn for us in India in comparing the two dam breach incidents and how both are treated.

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Dam Safety · Dams

Singrauli Fly Ash Dam Breach: Who regulates these dams in India?

A fly ash Dam of Sasan Ultra Mega Power Project of Reliance Company has breached[i] in the evening of April 10, 2020, near village Harrahva in Singrauli district of Madhya Pradesh, killing six people and destroying downstream river and fields. Following the breach there was massive flash flood of coal ash mixed sludge reportedly affecting hundreds of villages and destroying crops on thousands of acres.

Of the six people feared to have been killed in the flash floods, dead bodies of two have been found in faraway areas, while four are still missing. Two women injured in the aftermath are reported to be in stable condition in local hospital. Reports also suggest that many people could be trapped in their homes because of the poisonous sludge.

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Dam floods · Dam Induced Flood Disaster · Dam Safety

2019 Monsoon: Instances when Dam Safety Came into Question

The South West Monsoon in 2019 in India brought the highest rainfall of last 25 years and issues related to heavy rainfall continue even to the end of October 2019. Here we have listed major instances during the monsoon when there were question marks over safety of dams either due to structural safety or due to wrong operations of the dams. Some issues of breaches of embankments/ canals are also included here. As we can see, the instances come from across the country, including North East, North, West, Centre, South.

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