Johnson County Bridge Report Card
Johnson County scores 89 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Johnson County, Wyoming
Johnson County has 204 bridges in the National Bridge Inventory, with 7 rated poor and 1 rated scour-critical. Its poor-condition share of 3.4% is at or below the 7.1% statewide average. Poor-condition bridges carry about 2,110 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Johnson County a Bridge Condition Exposure Score of 89/100 (B). The county has 204 bridges in the National Bridge Inventory, including 7 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 2,110 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 | 3.4% | 6.9 |
| Poor-condition traffic exposure | 25 | 0.7% of measured traffic | 0.5 |
| Scour-critical bridge share | 20 | 0.5% | 1.0 |
| Average age vs national baseline | 10 | 55 years vs 48 nationally | 3.0 |
| Traffic-data completeness | 5 | 299,159 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 | 3.4% |
| State Poor-Condition Share | 7.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.5% |
| Average Bridge Age | 55 years |
| Poor-Condition Traffic Exposure | 2,110 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Johnson County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| I-25 Sbl over South Fork Powder River | Poor condition + traffic exposure | Poor | 1,647 | 1960 |
| Jo Cnty RD 1 over Rock Creek | Poor condition + traffic exposure | Poor | 168 | 1994 |
| Jo Cnty RD 204a over Crazy Woman Creek | Poor condition + traffic exposure | Poor | 98 | 1950 |
| Jo Cnty RD 13 over I-25 | Poor condition + traffic exposure | Poor | 75 | 1968 |
| Jo Cnty RD 85 over Rock Creek | Poor condition + traffic exposure | Poor | 56 | 1976 |
| Jo Cnty RD 14 over N F Crazy Woman Creek | Poor condition + traffic exposure | Poor | 53 | 1997 |
| Jo Cnty RD 78 over Middle Fork Powder River | Poor condition + traffic exposure | Poor | 13 | 1989 |
| Jo Cnty RD 195 over Crazy Woman Creek | Scour-critical foundation rating | Good | 98 | 1987 |
| I-25 / US 87 Bus over Clear Creek | High traffic | Fair | 5,733 | 1975 |
| I-90 Wbl over Jo CR 1 (rock Creek Rd) | High traffic | Fair | 3,990 | 1963 |
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.