Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Built Complexes and Districts (hierarchy name)
5. complexes (buildings and sites)
6. [complexes by function]
7. industrial complexes
8. power plants (complexes)
9. hydroelectric power plants

Anotations

Scope note:

Power plants using water pumped to and stored at a high elevation during periods of low energy demand, for use when demand is high, when water is released to operate hydraulic turbines to produce needed electricity.