Structurally Deficient Bridges by ZIP Code

Source period . Recomputed by ZipCheckup from the cited federal source.

For the median U.S. ZIP code, 5.4% of nearby bridges are structurally deficient; 23.6% of 42,675 ZIP codes are at or above 10%, as of .

In the typical U.S. ZIP code, 5.4% of nearby bridges are rated structurally deficient; 23.6% of 42,675 ZIP codes sit at or above 10%, as of .

By state

risk levelcountpct
Low13,20630.9%
Moderate15,32135.9%
Elevated10,08823.6%
High4,0299.4%
no_data310.1%
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Open data, licensed CC BY 4.0 · DOI: 10.5281/zenodo.19427201

How we compute this

We use the FHWA National Bridge Inventory structurally-deficient rating as a per-ZIP share: of the bridges near a ZIP code, what percentage carry that rating. We report the median across ZIP codes and the share of ZIP codes at or above a 10% threshold.

We deliberately do NOT sum a national bridge count. The per-ZIP bridge tally is a proximity count — a bridge near two ZIP codes is counted under both — so only the per-ZIP deficient-share distribution is sound. The code throws if anyone attempts a national bridge-count sum.

ZIP codes are grouped into risk levels by their deficient share. Figures recompute each build, and each ZIP code links to its per-ZIP report.

Source: FHWA National Bridge Inventory (per-ZIP structurally-deficient share)
Every number here is recomputed from public federal data on each build by open-source code in the ZipCheckup repository; a dated CSV snapshot is published with each finding. No data does not mean safe.

Frequently asked questions

What share of bridges are structurally deficient?

In the typical U.S. ZIP code, 5.4% of nearby bridges carry a structurally-deficient rating from the FHWA National Bridge Inventory, as of . ZipCheckup reports this as a per-ZIP distribution, not a national bridge count. according to ZipCheckup's reading of the cited federal source period, .

How many ZIP codes have high structurally-deficient bridge shares?

23.6% of 42,675 U.S. ZIP codes have at least 10% of their nearby bridges rated structurally deficient, as of . The table breaks ZIP codes into risk levels by that share.

How to cite this page

APA ZipCheckup. (n.d.). Structurally Deficient Bridges by ZIP Code. https://zipcheckup.com/findings/structurally-deficient-bridges-by-zip/
BibTeX 
@misc{zipcheckup-findings-structurally-deficient-bridges-by-zip,
  author = {{ZipCheckup}},
  title  = {{Structurally Deficient Bridges by ZIP Code}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/findings/structurally-deficient-bridges-by-zip/}
}