The BAM Tidal Bridge is a proposed bifunctional concept of a bridge connection between two Indonesian islands, and the world’s largest tidal power plant. The wave forcing on the floating structure leads to an undesired dynamic response and a decreased operating reliability. The thesis objective is about designing an additional structure or a design modification to the Tidal Bridge that reduces the downtime to a maximum of five days per year. A model has been developed to analyse the dynamic response of the original Tidal Bridge design, and to test possible design optimisations. Three successive design loops lead to the resulting design of an innovative sway plate structure which fulfils the design objective well.