Brule County Bridge Report Card
Brule County scores 70 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Brule County, South Dakota
Brule County has 38 bridges in the National Bridge Inventory, with 3 rated poor and 1 rated scour-critical. Its poor-condition share of 7.9% is at or below the 16.1% statewide average. Poor-condition bridges carry about 4,461 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Brule County a Bridge Condition Exposure Score of 70/100 (C). The county has 38 bridges in the National Bridge Inventory, including 3 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 4,461 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 | 7.9% | 15.8 |
| Poor-condition traffic exposure | 25 | 6.2% of measured traffic | 4.6 |
| Scour-critical bridge share | 20 | 2.6% | 5.3 |
| Average age vs national baseline | 10 | 59 years vs 48 nationally | 4.5 |
| Traffic-data completeness | 5 | 72,524 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 | 7.9% |
| State Poor-Condition Share | 16.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 2.6% |
| Average Bridge Age | 59 years |
| Poor-Condition Traffic Exposure | 4,461 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Brule County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Sd050 over R&w Rr | Poor condition + traffic exposure | Poor | 4,431 | 1952 |
| 365 Avenue over Smith Ck | Poor condition + traffic exposure | Poor | 15 | 1956 |
| 365 AVE Fas 6115 over Br Smith Ck | Poor condition + traffic exposure | Poor | 15 | 1956 |
| Sd045 over Br Smith Ck | Scour-critical foundation rating | Fair | 949 | 1957 |
| I090 over Ck | High traffic | Good | 7,670 | 1964 |
| I090 over Mo. Rv (francis Case Lk) | High traffic | Fair | 7,260 | 1974 |
| I090 over Main ST R&w Rr | High traffic | Good | 7,260 | 1974 |
| I090 W over 356 AVE | High traffic | Good | 5,059 | 1964 |
| I090 E over 356 AVE | High traffic | Good | 5,059 | 1964 |
| I090 W over 251 ST | High traffic | Good | 5,059 | 2006 |
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.