the oosterschelde barrier

1953 alternative architecture barrage barrier blade blades blocking building civil close coastline construction control delta deltaworks disaster dunes dutch ebb ebbtide electric electricity energy engineering environment europe flood floodcontrol generate generating generator holland impressive jans metal mill neeltje netherlands north northsea oosterschelde oosterscheldekering outdoor outside piers pillar poles power prevent prevention propeller protect protection renewable rotate rotating rotation safe safety sea shades slides spin spinning storm structure surge technique technology tide turbine water watermanagement watts wind windmill wings works zeeland