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[E3 wise]

Tidal Lagoon Swansea Bay Ltd wants to design, construct and operate the lagoon to generate renewable energy.

It would be designed to generate 400,000 MWh of renewable energy per year - enough to supply more than 100,000 homes, it is claimed.

The firm hopes to submit a planning application for the scheme next year.

The location of the lagoon has been chosen to use shallower water depths, thereby minimizing the overall height of the seawalls and the materials required for construction”

In a 116-page report to the UK's planning inspectorate, National Infrastructure Planning, it outlines how the lagoon would work and the impact on the environment.

The proposed lagoon, which would take about two years to build, would comprise an impounding "breakwater or seawall" of about 9.5km (5.9 miles) in length.

It would hold on to water and then let it out through turbines at both high and low tides which would generate electricity.

At low tide, water would flow from the lagoon into the sea, and from the sea into the lagoon at high tide.
"The proposed tidal lagoon will have an installed capacity of 250-350MW, capable of generating over 400,000MWh/year," the report said.

"This is enough to supply well over 100,000 homes, or the equivalent to Swansea city's domestic electricity use."

http://www.bbc.co.uk...-wales-20026733