Dearborn County Bridge Report Card
Dearborn County scores 49 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Dearborn County, Indiana
Dearborn County has 145 bridges in the National Bridge Inventory, with 18 rated poor and 14 rated scour-critical. Its poor-condition share of 12.4% is above the 5.3% statewide average. Poor-condition bridges carry about 49,794 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Dearborn County a Bridge Condition Exposure Score of 49/100 (F). The county has 145 bridges in the National Bridge Inventory, including 18 in poor condition and 14 rated scour-critical. Poor-condition bridges carry about 49,794 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 12.4% | 24.8 |
| Poor-condition traffic exposure | 25 | 7.9% of measured traffic | 5.9 |
| Scour-critical bridge share | 20 | 9.7% | 19.3 |
| Average age vs national baseline | 10 | 51 years vs 48 nationally | 1.3 |
| Traffic-data completeness | 5 | 629,567 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 12.4% |
| State Poor-Condition Share | 5.3% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 9.7% |
| Average Bridge Age | 51 years |
| Poor-Condition Traffic Exposure | 49,794 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Dearborn County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| SR 46 over Whitewater River | Poor condition + traffic exposure | Poor | 4,142 | 1937 |
| Sneakville RD over Salt Fork Tanners Creek | Poor condition + traffic exposure | Poor | 550 | 1950 |
| Sneakville RD over Salt Fork Tanners Creek | Poor condition + traffic exposure | Poor | 550 | 1990 |
| Collier Ridge RD over Branch W Fork Tanners CR | Poor condition + traffic exposure | Poor | 330 | 1910 |
| I-275 over Ohio River Csx Rr CR | Poor condition + traffic exposure | Poor | 40,222 | 1976 |
| N Hogan RD over Branch Of N Hogan Creek | Poor condition + traffic exposure | Poor | 1,050 | 1915 |
| N Hogan RD over Little Hogan Creek | Poor condition + traffic exposure | Poor | 970 | 1963 |
| N Hogan RD over Branch Of North Hogan CR | Poor condition + traffic exposure | Poor | 950 | 1920 |
| Bonnell RD over Branch W For Tanners CR | Poor condition + traffic exposure | Poor | 150 | 1935 |
| Bells Branch RD over Baum Hollow Creek | Poor condition + traffic exposure | Poor | 110 | 1945 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.