Natrona County Bridge Report Card
Natrona County scores 92 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Natrona County, Wyoming
Natrona County has 135 bridges in the National Bridge Inventory, with 5 rated poor and 0 rated scour-critical. Its poor-condition share of 3.7% is at or below the 7.1% statewide average. Poor-condition bridges carry about 3,466 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Natrona County a Bridge Condition Exposure Score of 92/100 (A). The county has 135 bridges in the National Bridge Inventory, including 5 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 3,466 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 | 3.7% | 7.4 |
| Poor-condition traffic exposure | 25 | 0.7% of measured traffic | 0.5 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 47 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 481,217 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 | 3.7% |
| State Poor-Condition Share | 7.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 47 years |
| Poor-Condition Traffic Exposure | 3,466 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Natrona County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Wyo 220 over Casper Canal | Poor condition + traffic exposure | Poor | 3,090 | 1967 |
| Na Cnty RD 412 over Hogback Draw | Poor condition + traffic exposure | Poor | 165 | 1929 |
| Hereford Lane over I-25 | Poor condition + traffic exposure | Poor | 136 | 1960 |
| Na Cnty RD 110 over South Fork Powder River | Poor condition + traffic exposure | Poor | 53 | 1977 |
| Na Cnty RD 102 over Badwater Creek | Poor condition + traffic exposure | Poor | 22 | 1940 |
| Wyo 220 over Garden Creek | High traffic | Fair | 26,351 | 2001 |
| Wyo 220 over North Platte River | High traffic | Fair | 14,749 | 1969 |
| Wyo 220 over Bnsf Railway | High traffic | Fair | 14,641 | 1969 |
| I-25 Sbl over North Mckinley Street | High traffic | Fair | 12,618 | 1958 |
| I-25 Nbl over North Mckinley Street | High traffic | Fair | 12,577 | 1958 |
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.