Lincoln County Bridge Report Card
Lincoln County scores 64 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Lincoln County, South Dakota
Lincoln County has 207 bridges in the National Bridge Inventory, with 32 rated poor and 4 rated scour-critical. Its poor-condition share of 15.5% is at or below the 16.1% statewide average. Poor-condition bridges carry about 2,510 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Lincoln County a Bridge Condition Exposure Score of 64/100 (D). The county has 207 bridges in the National Bridge Inventory, including 32 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 2,510 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 | 15.5% | 30.9 |
| Poor-condition traffic exposure | 25 | 0.5% of measured traffic | 0.4 |
| Scour-critical bridge share | 20 | 1.9% | 3.9 |
| Average age vs national baseline | 10 | 51 years vs 48 nationally | 1.3 |
| Traffic-data completeness | 5 | 468,212 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 | 15.5% |
| State Poor-Condition Share | 16.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.9% |
| Average Bridge Age | 51 years |
| Poor-Condition Traffic Exposure | 2,510 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Lincoln County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| 466th Avenue over Saddle Creek | Poor condition + traffic exposure | Poor | 495 | 1964 |
| 469th Avenue over Tributary To Ash Creek | Poor condition + traffic exposure | Poor | 261 | 1935 |
| 472nd Avenue over Saddle Creek | Poor condition + traffic exposure | Poor | 150 | 1938 |
| 476th Avenue over Trib. To W Brule Creek | Poor condition + traffic exposure | Poor | 137 | 1940 |
| 476th Avenue over S Fork Of Beaver Creek | Poor condition + traffic exposure | Poor | 117 | 1963 |
| 464th Avenue over Blind Creek | Poor condition + traffic exposure | Poor | 80 | 1941 |
| 478th Avenue over Trib. To E Brule Creek | Poor condition + traffic exposure | Poor | 75 | 1976 |
| 280th Street over Beaver Creek | Poor condition + traffic exposure | Poor | 74 | 1935 |
| 468th Avenue over Beaver Creek | Poor condition + traffic exposure | Poor | 68 | 1940 |
| 274th Street over Beaver Creek | Poor condition + traffic exposure | Poor | 67 | 1935 |
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.