The Teesta-V hydropower station, in Sikkim, northern India, has been rated as an example of international good practice in hydropower sustainability, according to an independent report.
The 510MW power station, owned and operated by NHPC Limited, was reviewed by a team of accredited assessors using the Hydropower Sustainability Assessment Protocol. Their report, which looked at the project’s operation, has now been published and is available to view online.
The assessment, the first of its kind in India, was conducted between January and June 2019 and involved two visits to the project area, with stakeholder interviews from 4-13 March.
According to the report, Teesta-V met or exceeded international good practice across all 20 performance criteria. It met proven best practice on its management of asset reliability and efficiency, financial viability, project benefits, cultural heritage, public health, and erosion and sedimentation.
Teesta-V is also the first hydropower project globally to publish results against new performance criteria covering its resilience to climate change and mitigation of carbon emissions, after the Hydropower Sustainability Assessment Protocol (HSAP) was expanded in scope in 2018.
Teesta-V is part of a cascade of hydropower projects along the Teesta River. It was built to supply power to Sikkim’s Energy & Power Department and other state-owned distribution companies in India’s eastern region, and commissioned in 2008 as the first large-scale power station in Sikkim.
The report documents how NHPC, formerly known as the National Hydroelectric Power Corporation, managed impacts on local communities and the environment, and how the project has provided “significant” benefits, including providing low-cost electricity and employment.
“Over the first ten years of operations, NHPC has expanded its activities along the Teesta River and made significant efforts to mitigate its social and environmental impacts, to create socio-economic benefits, and to communicate and cooperate with local communities,” the report said.
In a statement, NHPC Limited said: “Our company operates with a mission to achieve excellence in the development of clean power at international standards. Following this mission and vision in letter and spirit, NHPC sought a hydropower sustainability assessment of the Teesta-V Power Station using the Hydropower Sustainability Assessment Protocol.
“It is the first such assessment in India which itself proves the commitment of NHPC towards the sustainable development of hydropower. It is heartening to see that the Teesta-V Power Station has not only met basic good practices on all the parameters but it has also met global best practices on six performance areas. The results of this assessment will help NHPC to improve its business processes wherever required and to emulate best performance in its other projects.”
Dr Joerg Hartmann, lead assessor, said: “This assessment helped NHPC identify strengths as well as weaknesses in the Teesta-V project. These lessons can now be applied across the company’s entire project portfolio, and because NHPC chose to be transparent with the results, across the entire Indian hydropower sector. In fact, some of the best practices identified in the assessment – such as conducting a follow-up Environmental Impact Assessment (EIA) ten years after project commissioning, to verify initial predictions of impacts and the effectiveness of mitigation measures – should be considered by project owners everywhere.”