Washington County Bridge Report Card
Washington County scores 93 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Washington County, Utah
Washington County has 177 bridges in the National Bridge Inventory, with 1 rated poor and 5 rated scour-critical. Its poor-condition share of 0.6% is at or below the 3.5% statewide average. Poor-condition bridges carry about 66 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Washington County a Bridge Condition Exposure Score of 93/100 (A). The county has 177 bridges in the National Bridge Inventory, including 1 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 66 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 | 0.6% | 1.1 |
| Poor-condition traffic exposure | 25 | 0.0% of measured traffic | 0.0 |
| Scour-critical bridge share | 20 | 2.8% | 5.6 |
| Average age vs national baseline | 10 | 38 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 2,284,839 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 | 0.6% |
| State Poor-Condition Share | 3.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 2.8% |
| Average Bridge Age | 38 years |
| Poor-Condition Traffic Exposure | 66 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Washington County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Co RD Inter X-road over I-15 (sr-15) NB And SB | Poor condition + traffic exposure | Poor | 66 | 1959 |
| City Street over Virgin River | Scour-critical foundation rating | Fair | 13,973 | 1976 |
| County Road over Santa Clara River | Scour-critical foundation rating | Fair | 6,533 | 1931 |
| Hurricane City Rd. over Leeds Creek | Scour-critical foundation rating | Fair | 504 | 1931 |
| Kolob Road over North Creek | Scour-critical foundation rating | Fair | 151 | 1981 |
| Center Street over Nash Creek | Scour-critical foundation rating | Fair | 126 | 2004 |
| I-15 over Washington Main Street | High traffic | Good | 67,000 | 2023 |
| I-15 over Mall Drive | High traffic | Good | 66,408 | 2017 |
| I-15 over Mall Drive | High traffic | Good | 66,408 | 2017 |
| I-15 (sr-15) Nb&sb over Mill Creek | High traffic | Fair | 64,174 | 1964 |
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.