Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by function]
8. hydraulic structures
9. [hydraulic structures by function]
10. dams (hydraulic structures)
11. [dams by function]

Narrower term/s

• wasteweirs (weirs)

Anotations

Scope note:

Barriers or dams across waterways to regulate water level or divert or measure water flow, for example, to drive a mill wheel or as constructed on a canal or navigable river to retain the water and prevent overflow.