ARCUS Atlas record
Bridge over Strona stream
Total collapse of a municipal bridge over the Strona stream near Valstrona (Verbania, Piemonte) on 2-3 October 2020, triggered by the extreme flood affecting the Verbano-Cusio-Ossola area where rainfall records were broken (630 mm/24h at Sambughetto). No fatalities directly attributed to this collapse. Database ponti fluviali danneggiati di D'Angelo, Ballio & Ravazzani (2025), IJDRR 'Geomorphologic risk factors for river bridges', suppl. S3, record P186 (accuratezza diagnosi dec=1): processo = erosione verticale (scour); componenti danneggiate = spalle, impalcato; evidenza di sormonto = no.
- ARCUS ID
- IT20.10.10
- Date
- 2020-10-03
- Municipality
- Valstrona
- Province
- Verbania
- Region
- Piemonte
- Coordinates
- 45.9055, 8.328 · exact location
- Crossing
- Strona stream
- Use
- Municipal
- Severity
- TC
- Structural type
- Beam bridge
- Material
- Reinforced concrete
- Cause category
- Natural
- Specific cause
- Hydraulic
- Failure trigger
- Flood
- Failure process
- Scour
- Component involved
- Multiple components
- Cause evidence
- Documented
- Source confidence
- Medium
- Victims
- 0
- Injuries
- 0
Documentary sources (4)
- 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)
- Eventi alluvionali in Piemonte – Evento del 2-3 ottobre 2020 (Dipartimento Rischi Naturali e Ambientali, rev 1.1) (Official/Technical · ARPA Piemonte · 2020-10-14)