Structurally Deficient Bridges by ZIP Code

Data current as of March 2026. Recomputed by ZipCheckup from federal data each build.

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 March 2026.

By state

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.

Frequently asked questions

@misc{zipcheckup-findings-structurally-deficient-bridges-by-zip,
  author = {{ZipCheckup}},
  title  = {{Structurally Deficient Bridges by ZIP Code}},
  year   = {2026},
  url    = {https://zipcheckup.com/findings/structurally-deficient-bridges-by-zip/}
}