ARCUS Atlas record
Bridge over Niel stream
Total collapse of a provincial/regional bridge over the Niel stream near Gaby (Aosta, Valle d'Aosta) on 2-3 October 2020, triggered by the extreme flash flood that struck northwestern Italy with record rainfall exceeding 600 mm in 24 hours in some locations. The collapse was explicitly reported by the Valle d'Aosta civil protection authorities during the emergency, isolating the Gaby area. No fatalities directly attributed to this specific collapse. Database ponti fluviali danneggiati di D'Angelo, Ballio & Ravazzani (2025), IJDRR 'Geomorphologic risk factors for river bridges', suppl. S3, record P154 (accuratezza diagnosi dec=0.5): processo = erosione laterale di sponda; componenti danneggiate = rilevato di accesso, impalcato; evidenza di sormonto = no.
- ARCUS ID
- IT20.10.01
- Date
- 2020-10-03
- Municipality
- Gaby
- Province
- Aosta
- Region
- Valle d'Aosta (Valle d'Aoste)
- Coordinates
- 45.7133, 7.8816 · exact location
- Crossing
- Niel stream
- Use
- Provincial/Regional
- Severity
- TC
- Structural type
- Beam bridge
- Material
- Reinforced concrete
- Cause category
- Natural
- Specific cause
- Hydraulic
- Failure trigger
- Flood
- Failure process
- Bank erosion / embankment failure
- Component involved
- Multiple components
- Cause evidence
- Probable
- Source confidence
- High
- Victims
- 0
- Injuries
- 0
Documentary sources (3)
- Alluvione ottobre 2020 – Danni in 108 comuni del Piemonte (Official/Technical · Protezione Civile · 2020-10-04)
- Maltempo Liguria e Piemonte: ponti crollati, morti e dispersi (News · ANSA · 2020-10-03)
- Alluvione in Piemonte: ponti crollati, dopo la catastrofe si contano i danni (News · Montagna.TV · 2020-10-05)