The Western Training Wall, as it is known, was built in the 1920s, extended in the 1960s and has since been repaired several times to extend its life.
But an independent investigation this summer into its condition recommended that a complete rebuild was the most cost effective course of action, saving on costly short term repairs. The report indicated that this needs to be done with some urgency.
Jackson has been in final talks with the Environment Agency to carry out the import flood defence works, which will see 1.5km of sea wall completely replaced.
Work is programmed to start early next year with construction taking an estimated three months to complete.