Assertion: bridge | /r/HasProperty | needed
Facets:
value: often
type: DEGREE
value: to retain the soil
type: PURPOSE
Source sentences:
text: Longer spans on the other hand, are governed by congested traffic and no allowance for dynamics is needed.
text: The bridge now traverses the Tarn valley above its lowest point, linking two limestone plateaus, the Causse du Larzac and the Causse Rouge [fr], and is inside the perimeter of the Grands Causses regional natural park.[citation needed]
text: Because the bridge is installed below the ground surface, it is often necessary to retain the soil above and around the bridge with a headwall and wingwalls.