Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Functions (hierarchy name)
4. functions (activities)
5. [functions by general context]
6. maintenance
7. protection (maintenance function)

Anotations

Scope note:

Protection measures intended to eliminate and reduce the hazard and damage that could result from avalanches, including issuing bulletins to the public, planting and maintaining stands of trees, building defensive structures, and preventatively clearing areas of loose snow by using controlled avalanches.