Allen County Bridge Report Card
Allen County scores 80 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Allen County, Ohio
Allen County has 364 bridges in the National Bridge Inventory, with 33 rated poor and 0 rated scour-critical. Its poor-condition share of 9.1% is above the 4.7% statewide average. Poor-condition bridges carry about 35,826 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Allen County a Bridge Condition Exposure Score of 80/100 (B). The county has 364 bridges in the National Bridge Inventory, including 33 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 35,826 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 | 9.1% | 18.1 |
| Poor-condition traffic exposure | 25 | 3.1% of measured traffic | 2.3 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 43 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 1,145,091 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 | 9.1% |
| State Poor-Condition Share | 4.7% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 43 years |
| Poor-Condition Traffic Exposure | 35,826 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Allen County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Ft. Amanda Rd. over Little Ottawa Ft Amanda | Poor condition + traffic exposure | Poor | 6,549 | 1958 |
| Bluf - Main ST over Marsh Run - Dixie HWY | Poor condition + traffic exposure | Poor | 3,640 | 1927 |
| Bluf - Main ST over Riley Creek - Dixie HWY | Poor condition + traffic exposure | Poor | 3,481 | 1925 |
| Adgate Rd. over Ottawa River Adgate RD | Poor condition + traffic exposure | Poor | 3,457 | 1972 |
| Breese Rd. over Freund Creek - Breese RD | Poor condition + traffic exposure | Poor | 2,133 | 1958 |
| Slabtown Rd. over Stream Slabtown RD | Poor condition + traffic exposure | Poor | 1,848 | 1975 |
| Copus Rd. over Ottawa River - Copus RD | Poor condition + traffic exposure | Poor | 1,604 | 1986 |
| Bluf - Grove RD over Little Riley - Bluf Grov | Poor condition + traffic exposure | Poor | 1,547 | 1957 |
| Bluf - Bentley over Little Riley - Bentley R | Poor condition + traffic exposure | Poor | 1,404 | 1960 |
| Cleveland Street over Flat Fork Creek | Poor condition + traffic exposure | Poor | 1,000 | 1959 |
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.