Jones County Bridge Report Card
Jones County scores 79 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Jones County, South Dakota
Jones County has 37 bridges in the National Bridge Inventory, with 2 rated poor and 1 rated scour-critical. Its poor-condition share of 5.4% is at or below the 16.1% statewide average. Poor-condition bridges carry about 27 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Jones County a Bridge Condition Exposure Score of 79/100 (C). The county has 37 bridges in the National Bridge Inventory, including 2 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 27 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 | 5.4% | 10.8 |
| Poor-condition traffic exposure | 25 | 0.0% of measured traffic | 0.0 |
| Scour-critical bridge share | 20 | 2.7% | 5.4 |
| Average age vs national baseline | 10 | 60 years vs 48 nationally | 4.9 |
| Traffic-data completeness | 5 | 77,096 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 | 5.4% |
| State Poor-Condition Share | 16.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 2.7% |
| Average Bridge Age | 60 years |
| Poor-Condition Traffic Exposure | 27 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Jones County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| 227th Street over White Clay Creek | Poor condition + traffic exposure | Poor | 21 | 1965 |
| 227th Street over Bad River | Poor condition + traffic exposure | Poor | 6 | 1918 |
| Sd248 over Medicine Ck | Scour-critical foundation rating | Fair | 251 | 1941 |
| I090 W over 286 AVE (fas 6259) | High traffic | Good | 3,825 | 1970 |
| I090 E over 286 AVE (fas 6259) | High traffic | Fair | 3,825 | 1970 |
| I090 W over 279 AVE (fas 6500) | High traffic | Fair | 3,793 | 1970 |
| I090 E over 279 AVE (fas 6500) | High traffic | Fair | 3,793 | 1970 |
| I090 W over 282 AVE | High traffic | Fair | 3,793 | 1970 |
| I090 E over 282 AVE | High traffic | Fair | 3,793 | 1970 |
| I090 W over Ck | High traffic | Fair | 3,793 | 1970 |
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.