Boone County Bridge Report Card
Boone County scores 86 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Boone County, Kentucky
Boone County has 139 bridges in the National Bridge Inventory, with 8 rated poor and 0 rated scour-critical. Its poor-condition share of 5.8% is at or below the 7.5% statewide average. Poor-condition bridges carry about 60,089 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Boone County a Bridge Condition Exposure Score of 86/100 (B). The county has 139 bridges in the National Bridge Inventory, including 8 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 60,089 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 | 5.8% | 11.5 |
| Poor-condition traffic exposure | 25 | 3.5% of measured traffic | 2.6 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 45 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 1,720,834 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 | 5.8% |
| State Poor-Condition Share | 7.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 45 years |
| Poor-Condition Traffic Exposure | 60,089 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Boone County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| I-275 over Ohio River | Poor condition + traffic exposure | Poor | 38,411 | 1976 |
| Ky-842 over Ns (cno&tp) System | Poor condition + traffic exposure | Poor | 9,286 | 1982 |
| Cr-1001 over Gunpowder Creek | Poor condition + traffic exposure | Poor | 8,155 | 1951 |
| Ky-14 over Mccoys Fork | Poor condition + traffic exposure | Poor | 2,146 | 1931 |
| Ky-338 over Gum Branch | Poor condition + traffic exposure | Poor | 1,473 | 1953 |
| Cr-1128 over Mccoys Fork | Poor condition + traffic exposure | Poor | 422 | 1982 |
| Pebble Creek Way over Gunpowder Creek | Poor condition + traffic exposure | Poor | 121 | 1999 |
| Garrison Creek RD over Garrison Creek | Poor condition + traffic exposure | Poor | 75 | 1980 |
| I-75 over Ky 18 Ramp | High traffic | Fair | 140,378 | 1990 |
| I-75 Ramp over West Rmp Ky18 To I75sb | High traffic | Fair | 140,378 | 1990 |
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.