How Bridge Repair Gets Funded
An overview of federal, state, and local bridge-repair funding, and why a retired sufficiency rating does not establish current funding eligibility.
On this register · 2024 NBI
According to the Federal Highway Administration's 2024 National Bridge Inventory.
FHWA no longer uses sufficiency ratings to set federal eligibility. The 2024 condition file puts 42,080 bridges (6.8%) in Poor; Iowa is 19.16% versus Nevada at 1.14% among 49 inventories with 1,000+ bridges.
- 42,080
- Poor-condition records
- 6.8%
- Poor nationwide
- 19.16%
- Iowa · highest share
- 1.14%
- Nevada · lowest share
Current formula eligibility lives in FHWA program rules, not in the retired 0–100 score this site still recomputes as a labeled historical metric.
Who owns, and who pays
The NBI records an owner agency for every bridge, state highway agency, county, city, or a federal, tribal, toll, or private owner. The owner is generally who is responsible for maintenance and repair funding, and it's the starting point for federal funding programs: the Bridge Formula Program and Highway Bridge Program funds flow through state DOTs to the responsible owner, not directly to a specific structure.
Nationwide owner-agency mix
Exclusive FHWA owner-agency bands across all 623,216 bridges in the 2024 NBI file.
Why the retired sufficiency rating doesn't decide funding
FHWA discontinued the calculated 0-100 Sufficiency Rating as a reported NBI item. PlainBridges may recompute the former formula from legacy fields and shows it only as a labeled historical reference, see how that historical score is calculated. It does not determine current federal funding eligibility, which instead runs through each state's own project-selection process under the current Bridge Formula Program and each state DOT's asset-management plan.
A Poor condition rating (the lowest deck, superstructure, or substructure element at 4 or below on the 0-9 scale) is a strong signal a bridge is a repair candidate, but the responsible owner and state DOT ultimately decide project timing and funding source, weighing traffic volume, detour cost, and available budget alongside the condition record.
The funding layers
Most bridge repair and replacement draws on a mix of federal formula funds administered through the state DOT, state capital budgets, and, for locally-owned bridges, county or city road funds. Toll authorities and some private owners (railroads, industrial sites) fund their own structures separately. The owner-agency mix above is the closest public signal to which layer is most likely responsible for a given bridge.
What to do with this
Funding follows ownership, and ownership is a public NBI field, not a guess.
- State agency owns the largest share of the inventory, 300,429 bridges, that's usually who a repair request or funding question routes to first. State condition rankings
- The retired sufficiency rating is a historical reference only, current funding eligibility runs through each state's own project-selection process. How the historical score works
- Look up a specific bridge to see its recorded owner, year built, and current condition before assuming who's responsible. Search bridges
Owner-agency figures are the current FHWA 2024 NBI file; this guide does not represent any state's actual funding decision or project timeline.
Sources: Federal Highway Administration (FHWA) National Bridge Inventory.
Last updated: April 2026
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.