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The Gallery | The £62M giant flood gates designed to save Venice

The last of Venice’s huge flood gates have been built, as part of the project worth around £4.8bn to protect the Italian city from rising sea levels.

Croatian firm Brodosplit has completed 63 flood gates, which are 30m long and 20m high, and up to 5m deep, and weigh 300 tons each, in a deal worth around £62M.

The Mose project (Italian abbreviation of Modulo Sperimentale Elettromeccanico - Electromechanical Experimental Module) and involves installing mobile floodgates which will separate the Venetian Lagoon from Adriatic Sea when the tide is higher than 3m. There will be four barriers, made up of a total of 72 gates when finished. Construction started in 2003 and it is expected to have a 100 year life span. The installations consist of 20,000 tons of built-in steel.

When the gates are filled with water, they sit on the bottom of the sea, however as sea levels rise, they will be pumped with compressed air, so they lift to the surface and are used to close the entrance to the lagoon.

The city is threatened by a combination of subsidence and rising sea levels.

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