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The Severn Barrage plans would provide a predictable source of sustainable energy during lifetime of the scheme, with claims of up to 5% of the UK's electricity output from the 10-mile version. [41] This could reduce the cost of meeting UK's renewable energy targets, and help the UK to meet such targets, including those to tackle climate change ...
The annual output of electricity was estimated at approximately 17 terawatt hours (TWh). However, at the time Government decided a Severn Barrage was not a cost-effective option for generating electricity and plans were shelved. A comprehensive history of studies and plans for a Severn Barrage can be found under Severn Barrage.
Various schemes have been proposed for a Severn Barrage between England and Wales, potentially generating between 1 GW and 15 GW of renewable electricity. This would harness the significant tidal range of the Severn Estuary, the second largest tides globally. [35]
Severn Barrage: 8,640: Tidal Lagoon Swansea Bay: 320: Swansea Bay [24] Tugurskaya Tidal Power Plant: 3,640 Russia: Okhotsk Sea [25] Westray Firth 30 Orbital marine power United Kingdom: Westray Firth, Orkney [26] Yell Sound 15 Nova Innovation
The company was established in 2010 [1] as a consortium of companies forming a tidal energy business. [8] Its founders included engineering and construction companies, [9] [10] intending to promote the Severn Barrage. [10] It was originally named Corlan Hafren, [3] which means Severn Group in Welsh. [11]
Diagram of a plan to harness tidal power on the River Severn circa 1921. Caption from Popular Mechanics Magazine 1921 Barrage locations considered over the years. A huge tidal range and high level of surrounding industry and population have long made the Severn Estuary and Bristol Channel a focus for tidal energy schemes and ideas.
It has been stated that it would contribute significantly to UK climate change goals and European Union renewable energy targets. Earlier studies of a possible Severn Barrage included estimates of bed load transport of sand and gravel by tidal ebb and flood that would be interrupted if a solid dam were built across the Channel. [25]
Tidal Lagoon Swansea Bay was a proposed tidal lagoon power plant that was to be constructed in Swansea Bay off the south coast of Wales, United Kingdom.Development consent was granted by the UK government in June 2015, and in June 2018 the Welsh Government approved the plan and offered to invest £200 million; however, later that month the UK government withdrew its support on value-for-money ...