The tidal barrier which will protect thousands of homes and businesses from the risk of flooding.
Work on the 38 million pound project in Ipswich started today and it is due to open in 2016.
The council says it will secure the future of the town, and encourage economic growth.
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Remaining cold with sunny spells and further scattered rain and sleet showers. Any early snow will become restricted to hills.
Former New Zealand 'All-Black' recounts 1987 win and playing at Franklin's Gardens
Any remaining wintry showers will ease tonight but it will stay cold and there's a risk of frost and icy patches developing.