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  6. single built works (built environment)
  7. [single built works by specific type]
  8. [single built works by function]
  9. transportation structures
  10. [transportation structures by function]
  11. water transportation structures
  12. guidewalls
Scope note
Vertical, often wooden, structures to help align water borne vessels as they approach a lock or a bridge. Guidewalls guide the vessel into the lock chamber or between the piers of the bridge. These also provide a place for the vessels to tie-off while awaiting entry to a lock chamber.
Accepted term: 27-May-2024