Grant County Bridge Report Card
Grant County scores 80 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Grant County, Wisconsin
Grant County has 381 bridges in the National Bridge Inventory, with 16 rated poor and 21 rated scour-critical. Its poor-condition share of 4.2% is at or below the 6.7% statewide average. Poor-condition bridges carry about 4,590 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Grant County a Bridge Condition Exposure Score of 80/100 (B). The county has 381 bridges in the National Bridge Inventory, including 16 in poor condition and 21 rated scour-critical. Poor-condition bridges carry about 4,590 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 | 4.2% | 8.4 |
| Poor-condition traffic exposure | 25 | 1.3% of measured traffic | 1.0 |
| Scour-critical bridge share | 20 | 5.5% | 11.0 |
| Average age vs national baseline | 10 | 41 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 347,839 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 | 4.2% |
| State Poor-Condition Share | 6.7% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 5.5% |
| Average Bridge Age | 41 years |
| Poor-Condition Traffic Exposure | 4,590 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Grant County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Lrd Elm RD over Br Platte River | Poor condition + traffic exposure | Poor | 104 | 1955 |
| Lrd Preston RD over Cass Valley Branch | Poor condition + traffic exposure | Poor | 102 | 1930 |
| Lrd Town Line RD ( over Rogers Branch | Poor condition + traffic exposure | Poor | 50 | 1910 |
| Lrd Wills Lane (de over French Creek | Poor condition + traffic exposure | Poor | 50 | 1950 |
| Lrd Rattlesnake RD over Beetown Branch | Poor condition + traffic exposure | Poor | 37 | 1950 |
| Cth T over Wisconsin River 03 | Poor condition + traffic exposure | Poor | 1,200 | 1958 |
| Cth A over Dry Hollow Creek | Poor condition + traffic exposure | Poor | 830 | 1963 |
| Cth O over Platte River | Poor condition + traffic exposure | Poor | 600 | 1956 |
| Cth Q over Fennimore Creek | Poor condition + traffic exposure | Poor | 519 | 1984 |
| Cth G over Blue River | Poor condition + traffic exposure | Poor | 470 | 1950 |
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.