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.
More top news
Retailers are still hoping to clock up record Black Friday sales despite a slow start to the heavily discounted shopping day.
It will be breezy and overcast today will patchy drizzle at times
A year after the Duchess of Cambridge launched a £10 million appeal for a new hospice, it's been revealed £2 million has already been raised