Mercer County Bridge Report Card
Mercer County scores 38 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Mercer County, Missouri
Mercer County has 135 bridges in the National Bridge Inventory, with 23 rated poor and 12 rated scour-critical. Its poor-condition share of 17.0% is above the 8.8% statewide average. Poor-condition bridges carry about 3,356 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Mercer County a Bridge Condition Exposure Score of 38/100 (F). The county has 135 bridges in the National Bridge Inventory, including 23 in poor condition and 12 rated scour-critical. Poor-condition bridges carry about 3,356 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 | 17.0% | 34.1 |
| Poor-condition traffic exposure | 25 | 13.4% of measured traffic | 10.1 |
| Scour-critical bridge share | 20 | 8.9% | 17.8 |
| Average age vs national baseline | 10 | 47 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 24,998 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 | 17.0% |
| State Poor-Condition Share | 8.8% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 8.9% |
| Average Bridge Age | 47 years |
| Poor-Condition Traffic Exposure | 3,356 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Mercer County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| RT E E over W Honey CR | Poor condition + traffic exposure | Poor | 309 | 1932 |
| Bison ST over Lit Muddy CR | Poor condition + traffic exposure | Poor | 35 | 1994 |
| Beetle ST over Lit Weldon Rvr | Poor condition + traffic exposure | Poor | 15 | 1910 |
| Iceberg RD over Martin CR | Poor condition + traffic exposure | Poor | 15 | 1920 |
| Danube ST over Brushy CR | Poor condition + traffic exposure | Poor | 15 | 1971 |
| Ebony ST over Brush CR | Poor condition + traffic exposure | Poor | 5 | 1900 |
| Concord ST over Muddy CR | Poor condition + traffic exposure | Poor | 5 | 1910 |
| Foghorn ST over Br Lit Medicine CR | Poor condition + traffic exposure | Poor | 5 | 1940 |
| US 136 E over Grand Rvr Ovrfl | Poor condition + traffic exposure | Poor | 1,917 | 1971 |
| RT E E over W Medicine Ck | Poor condition + traffic exposure | Poor | 439 | 1971 |
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.