Swansea Bay tidal lagoon
Tidal Lagoon Plc was formed to design and construct a tidal lagoon in Swansea Bay where the tidal range can reach up to 12m, the second highest in the world.
The company submitted a planning application by means of a Development Consent Order and applying for a marine licence from the Welsh government, then began raising funds and negotiating with land owners and offshore rights owned by the Crown Estates.
The 240 MW scheme is estimated to cost £650m and is designed to have the capability of generating predictable renewable energy for 120,000 homes for 120 years. The centrepiece will be an educational, cultural and leisure building on the 6-mile tidal lagoon wall.
As tides are more reliable than wind, its energy might be considered a better bet than the rush to erect wind turbines across Britain’s countryside. The Swansea Bay scheme is calculated to save 216,000 tonnes of CO2 annually which is equivalent to taking 81,000 cars off the road. Turbine blades are of a size and speed that allow large fish to freely enter and exit the lagoon without harm. Additionally the perimeter walls provide leisure access for pedestrians and cyclists and the lagoon will attract dinghy sailing and other activities.
However, there remain issues to overcome, including the potential environmental damage (to both plants and animals) and the high strike price needed to make the project viable.
In the 2015 Budget, Chancellor George Osborne announced that negotiations had been opened to deliver the scheme.
On 9 June 2015, the application for the Tidal Lagoon Swansea Bay proposal was given development consent by the Department for Energy and Climate Change. The decision, the recommendation made by the Examining Authority to the Secretary of State and the evidence considered by the Examining Authority in reaching its recommendation are available on the National Infrastructure Planning website.
However, in October 2015, it was announced that the start date for construction works had been delayed until March 2017 because of difficulties agreeing subsidies with the Government.
In January 2016, Prime Minister David Cameron cast doubt over the project whilst giving evidence to the Parliament’s Liason Committee, when he said, “The problem with tidal power, simply put, is that at the moment we have not seen any ideas come forward that can hit a strike price in terms of pounds per megawatt-hour that is very attractive. That is the challenge for tidal. Maybe they can come up with something. They are very long-term schemes with big investments up front, and they can last for many, many years, but right now my enthusiasm is reduced slightly by the fact that the cost would be quite high.”
In February 2016, it was announced that the owners of SIMEC and Liberty House had invested more than £10m to acquire a stake in Tidal Lagoon Plc.
In February 2016, the government announced it was commissioning an independent review into the project. Energy minister Lord Bourne said: “I want to better understand whether tidal lagoons can be cost effective, and what their impact on bills will be – both today and in the longer term. This review will help give us that clarity so we can determine what role tidal lagoons could have as part of our plans to provide secure, clean and affordable energy for families and businesses across the country.” However no completion date was given for the review and it was seen by some as a way of avoiding having to make a difficult decision. In May 2016, it was announced that the review would be carried out by Conservative MP and former energy minister, Charles Hendry.
"If you look at the cost spread out over the entire lifetime - 120 years for the project - it comes out at about 30p per household for the next 30 years. That's less than a pint of milk. That's where I think we can start a new industry and we can do it at an affordable cost to consumers."
He also said that the lagoon would be a "world first" which was different to barrages elsewhere in the world as lagoons do not block the mouth of a river.
"We know it absolutely works," he said. "One of the great advantages is it is completely predictable for all time to come - we know exactly when the spring tides and neap tides are going to be every single day for the rest of time."
Swansea Bay would act as a pathfinder project, allowing people to learn more about the technology and then bring the cost down.
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