new bridge over ooser landgraben from haueneberstein to sandweier

animals area baden barrier birds black botany bridge brown closed concrete conservation construction crossing district dry durchfarhrt environmental fauna field flora force forest germany grass green grown haueneberstein hauenebersteinerstrasse herb hiking lamp landgraben low mud natural nature new old ooser path plant protect protection railing recreation reflection river riverbed roots sandweier sign site stream streambed traffic trail verboten water