The Wash Tidal Barrage, UK

Entrepreneur and founder of Pipex Internet, Dr Peter Dawe, has submitted plans for a an 11 mile tidal barrier across the mouth of the Wash. The barrier would generate electricity from tidal currents, and would protect large areas of Norfolk, Cambridgeshire and Lincolnshire from flooding.
Dawe believes that the Ł2bn-Ł3bn cost of building the barrage can be raised by private sources, and the investment would be recouped over its lifetime by selling the electricity it generates - the equivalent of a large nuclear power station.
Conservationists and wildlife enthusiasts have vowed to fight the scheme arguing that it would cause considerable damage to an internationally recognised conservation site. During winter, the Wash provides a refuge for more than 350,000 wading birds and wildfowl of 16 significant species, including oystercatcher and curlew.