Darke County Bridge Report Card
Darke County scores 99 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Darke County, Ohio
Darke County has 463 bridges in the National Bridge Inventory, with 2 rated poor and 0 rated scour-critical. Its poor-condition share of 0.4% is at or below the 4.7% statewide average. Poor-condition bridges carry about 1,148 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Darke County a Bridge Condition Exposure Score of 99/100 (A). The county has 463 bridges in the National Bridge Inventory, including 2 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 1,148 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 | 0.4% | 0.9 |
| Poor-condition traffic exposure | 25 | 0.3% of measured traffic | 0.2 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 40 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 458,651 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 | 0.4% |
| State Poor-Condition Share | 4.7% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 40 years |
| Poor-Condition Traffic Exposure | 1,148 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Darke County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Rhynard-fink over North Fork Of Stillwater | Poor condition + traffic exposure | Poor | 797 | 1977 |
| Woods over Ross Lateral | Poor condition + traffic exposure | Poor | 351 | 1983 |
| Sr-121 over Greenville Creek | High traffic | Good | 12,951 | 1934 |
| Sr-49 over Greenville Creek | High traffic | Good | 11,293 | 1907 |
| Usr-36 over SR 571 | High traffic | Good | 9,298 | 1969 |
| Sr-49 over Pansing Joint Ditch 433 | High traffic | Good | 7,912 | 1989 |
| Sr-49 over Dividing Branch | High traffic | Good | 7,818 | 1994 |
| Sr-49 over Bridge Creek | High traffic | Good | 7,714 | 1989 |
| Sr-49 over Ludlow Creek | High traffic | Good | 7,385 | 1999 |
| Sr-49 over Branch Of Ludlow Creek | High traffic | Good | 7,385 | 2001 |
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.