Bridge Failure

Hazard in Transportation Incidents

An infrastructure hazard where the loss of a single span can sever a community's access, detours and emergency routes.

Plans also call it: bridge collapse, bridge strike, overpass collapse

Talk to us about Bridge FailureAll 73 hazards →

What you’d hand your council

The first page of a Bridge Failure evidence brief: likelihood, impact and readiness on your own scale, every figure sourced.

Evidence brief for Cedar Ridge County (example)

September 14, 2026

Bridge Failure

Hazard in Transportation Incidents, on the established threats & hazards list

Impact
5432112345

Likelihood

Likelihood
2

Unlikely — Possible but infrequent — roughly once in 50 to 100 years (1–2% chance in any year).

Impact
3

Moderate — Notable effects — injuries possible, damage in multiple areas, essential services disrupted for days.

Readiness
3

Moderate — The organization has a generally established capability to manage this threat or hazard, but identifiable gaps remain. The organization could likely perform many required actions, though effectiveness may vary depending on conditions, staffing, resources, or complexity.

  • 2source documents
  • 58verified mentions
  • —federal declarations
  • —NRI risk score
Worked example: Cedar Ridge County is fictional. The scores illustrate the format and are nobody's decision. Open a full sample brief →

The national record

FEMA’s National Risk Index doesn’t model Bridge Failure. Your team fills it with local evidence, and Hazzard shows the gap rather than a zero.

How it maps

The same hazard in the vocabularies your plan and FEMA already use.

FEMA National Risk Index
Not covered
FEMA declaration incident type
Not covered
NOAA Storm Events type
Not covered
Hazzard category
Transportation Incidents, infrastructure and technology

The national record

What the federal data says about Bridge Failure: nothing yet

No federal dataset scores Bridge Failure or files declarations under it. That's common for threats and emerging hazards, and it's why a brief for Bridge Failure is built from your own plans, exercises and records. Hazzard shows the gap instead of inventing a number.

In your plan

What a Bridge Failure profile needs, and where each part comes from

A local hazard mitigation plan profiles each hazard the same way (44 CFR 201.6). Here is how Hazzard fills each part for Bridge Failure.

  1. Location

    44 CFR 201.6(c)(2)(i)

    Your documents

    No national layer maps Bridge Failure. We draw the geographic extent from your plans, studies and annexes, cited to the page.

  2. Extent

    44 CFR 201.6(c)(2)(i)

    Your documents

    The magnitude your plans use for Bridge Failure (a scale, a depth, an acreage, a duration), read from your documents and cited, so the profile states the strength you plan for.

  3. Previous occurrences

    44 CFR 201.6(c)(2)(i)

    Your documents

    FEMA files no declaration type for Bridge Failure. The history comes from your after-action reports, incident records and plans.

  4. Probability of future events

    44 CFR 201.6(c)(2)(i)

    Your team decides

    No national dataset gives a frequency for Bridge Failure. Your team scores likelihood on your scale from the evidence we organize.

  5. Vulnerability and impacts

    44 CFR 201.6(c)(2)(ii)

    Your documents

    The Census population profile and HHS emPOWER counts for context; the consequences themselves come from your plans and exercises.

  6. The assessment itself

    Your team decides

    Likelihood, impact and readiness for Bridge Failure are drafted with every source attached, and a person on your team accepts each one. Hazzard never records a score on its own.

How we can help

How we’d help you prepare for Bridge Failure

  1. 1

    We start from what you own

    Your EOP, corridor and exercise material, read so every statement about Bridge Failure points to its page.

  2. 2

    We add the context around it

    Population and access-and-functional-needs figures that shape consequence, and an honest note where the national record has nothing.

  3. 3

    You leave with a cited brief

    Likelihood, impact and readiness for Bridge Failure on your own scale, every figure tied to its source, ready for the planning team or the council.

Also in Transportation Incidents

Preparing for Bridge Failure

Put Bridge Failure on the list with evidence, not just a line item.

Transportation incidents rarely have a federal risk score, so plans tend to name them and move on. We give them the same cited treatment as the natural hazards around them. A person replies within one business day.

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