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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The Anglia region looks likely to enjoy a drier and sunnier spring than normal in 2015 although temperatures are near normal.
It should be a dry night tonight and sunny to start on Sunday before the rain creeps in.
A 41 year old woman arrested in connection with a number of suspected drugs overdoses in Bury St Edmunds has been bailed by police.