"maxdraft"=>"2.3","seamark:gate:category"=>"flood_barrage","seamark:gate:clearance_height"=>"999","seamark:gate:clearance_width"=>"9","seamark:information"=>"The gate closes @ water level NAP +2.4 m or higher","seamark:name"=>"Stavenisse, Keersluis","seamark:national_information"=>"De keersluis sluit bij een waterstand van NAP+2,40m","seamark:source"=>"https://www.vaarweginformatie.nl/frp/main/#/geo/detail/EXCEPT_NAV_STRUCTURE/36640","seamark:type"=>"gate"