Construction of MOSE was authorised by the "Comitatone" on 3April 2003 and the associated construction sites opened the same year. Work began simultaneously and continues in parallel at the three inlets of Lido, Malamocco and Chioggia. Work on the structural parts (foundations, mobile barrier abutments, gate housing structures), associated structures (breakwaters, small craft harbours, locks) and parts for operating the system (technical buildings, plant) is now at an advanced stage.
Currently about 4000 people are employed in the construction of MOSE.
As well as the construction sites at the inlets, fabrication of the main components of MOSE (the hinges, the technological heart of the system which constrain the gates to their housing and allow them to move, and the gates) is also proceeding. Restructuring of the buildings and spaces in the area of the Venice Arsenal where maintenance of MOSE and management of the system will be located is also underway.