although large projects are costly and unrealistic for sids technologies are scalable including damlike structures built across narrow bays or river mouths and more novel designs of tidal lagoons where appropriate resource exists tidal range is a feasible option and in countries where hydropower is established there is an opportunity to use infrastructure skills and experience already acquired to facilitate construction it is also possible to integrate tidal range technology with other services such as mariculture shoreline development flood protection and transport links between islands