Indiana bridge conditions
19,542 inventoried bridges · 1,043 rated poor · county by county
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 1,043 of Indiana's 19,542 inventoried bridges are rated in poor condition (5.3%) in the 2025 National Bridge Inventory, as of .
- 8,213 bridges (42.0%) are rated good and 10,286 (52.6%) fair.
- The national poor rate is about 6.7%; Indiana is at or below it (see all states ranked).
- The busiest poor-rated bridge in the state is I-465 over Delaware Creek in Marion County, carrying about 129,314 vehicles a day.
By the measure that matters most - the most traffic on a poor rating - it is I-465 over Delaware Creek in Marion County, built 1966, carrying about 129,314 vehicles a day. That is a repair-priority flag, not a collapse warning: what a poor rating does and does not mean. See the worst bridge in every state.
Good 42.0% · Fair 52.6% · Poor 5.3% of 19,542 bridges
Bridge conditions by county
Sorted by the number of poor-rated bridges. Click any county for its full bridge list.
The 25 busiest poor-rated bridges in Indiana
Frequently asked questions
How many bridges in Indiana are in poor condition?
1,043 of Indiana's 19,542 inventoried highway bridges are rated in poor condition (5.3%) in the 2025 National Bridge Inventory. 'Poor' is FHWA's classification for a bridge whose deck, superstructure, or substructure is rated 4 or lower on the 0-9 scale; it was formerly called 'structurally deficient'.
Are the poor-rated bridges in Indiana safe to drive on?
A poor rating flags advanced deterioration that needs repair or close monitoring; it does not by itself mean a bridge is unsafe. Bridges judged unsafe are closed or restricted to lighter loads by the owner. Inspections continue on all open bridges, generally at least every 24 months under the National Bridge Inspection Standards.
Source: FHWA National Bridge Inventory, 2025 vintage, reported by the Indiana DOT.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.