It seems that it is nearly finished. They have installed the 200 ton tidal gate – much the same as they use for the Thames Barrier down in Greenwich. There is a full article about the current status on the Ipswich Star web site.
There is a good stop motion video onYouTube that shows the installation of the gate.
Watch it a second time and see the sand/gravel train that we used to see, from our old apartment, over on the West Bank of the docks. It is fun to watch it going backwards and forwards as it shunts the various wagons into the dock and back. (Sorry – I am a bit of a train buff!).