McPherson County Bridge Report Card
McPherson County scores 100 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
McPherson County, South Dakota
McPherson County has 14 bridges in the National Bridge Inventory, with 0 rated poor and 0 rated scour-critical. Its poor-condition share of 0.0% is at or below the 16.1% statewide average.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives McPherson County a Bridge Condition Exposure Score of 100/100 (A). The county has 14 bridges in the National Bridge Inventory, including 0 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 0 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 | 0.0% | 0.0 |
| Poor-condition traffic exposure | 25 | 0.0% of measured traffic | 0.0 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 48 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 4,918 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 | 0.0% |
| State Poor-Condition Share | 16.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 48 years |
| Poor-Condition Traffic Exposure | 0 vehicles/day |
Bridges to Watch
Top Bridges to Watch in McPherson County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Sd010 over Foot Ck | High traffic | Fair | 770 | 1957 |
| Sd010 over Ck | High traffic | Fair | 770 | 1957 |
| Sd010 over North Br Willow Ck | High traffic | Fair | 770 | 1957 |
| Sd010 over Trib To Foot Ck | High traffic | Fair | 753 | 2014 |
| Sd045 over Ck | High traffic | Fair | 391 | 1996 |
| Sd045 over Ck | High traffic | Fair | 391 | 1996 |
| 363rd Avenue over Creek | High traffic | Good | 218 | 1952 |
| 363rd Avenue over Foot Creek | High traffic | Good | 218 | 2021 |
| Sd045 over Spring Ck | High traffic | Fair | 188 | 1933 |
| Sd047 over Ck | High traffic | Fair | 160 | 1954 |
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.