Hamilton County Bridge Report Card
Hamilton County scores 80 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Hamilton County, Tennessee
Hamilton County has 464 bridges in the National Bridge Inventory, with 28 rated poor and 6 rated scour-critical. Its poor-condition share of 6.0% is above the 4.4% statewide average. Poor-condition bridges carry about 801,270 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Hamilton County a Bridge Condition Exposure Score of 80/100 (B). The county has 464 bridges in the National Bridge Inventory, including 28 in poor condition and 6 rated scour-critical. Poor-condition bridges carry about 801,270 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 | 6.0% | 12.1 |
| Poor-condition traffic exposure | 25 | 6.0% of measured traffic | 4.5 |
| Scour-critical bridge share | 20 | 1.3% | 2.6 |
| Average age vs national baseline | 10 | 49 years vs 48 nationally | 0.5 |
| Traffic-data completeness | 5 | 13,391,836 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 | 6.0% |
| State Poor-Condition Share | 4.4% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.3% |
| Average Bridge Age | 49 years |
| Poor-Condition Traffic Exposure | 801,270 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Hamilton County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| I24 Ebl & Wbl over Branch | Poor condition + traffic exposure | Poor | 115,412 | 1960 |
| I75 over Branch | Poor condition + traffic exposure | Poor | 110,093 | 1959 |
| I24 over Sou Rwy (abandoned) | Poor condition + traffic exposure | Poor | 98,487 | 1963 |
| I24 Wbl over Missionary Ridge | Poor condition + traffic exposure | Poor | 94,104 | 1964 |
| I24 Ebl over Missionary Ridge | Poor condition + traffic exposure | Poor | 94,104 | 1965 |
| I24 over Browns Ferry (fau 3622) | Poor condition + traffic exposure | Poor | 69,132 | 1964 |
| I24 over Browns Ferry Rd(fau 3622 | Poor condition + traffic exposure | Poor | 69,132 | 1964 |
| Fau 8 over Tn River & Fau 5395 | Poor condition + traffic exposure | Poor | 26,697 | 1917 |
| Fau 3556 350035r over Abandoned Spur Line | Poor condition + traffic exposure | Poor | 16,893 | 1959 |
| Fau 3556 350045w over Csx & Ns Railroad | Poor condition + traffic exposure | Poor | 16,210 | 1954 |
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.