San Juan County Bridge Report Card
San Juan County scores 99 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
San Juan County, Utah
San Juan County has 49 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 3.5% statewide average.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives San Juan County a Bridge Condition Exposure Score of 99/100 (A). The county has 49 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 | 51 years vs 48 nationally | 1.4 |
| Traffic-data completeness | 5 | 71,643 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 | 3.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 51 years |
| Poor-Condition Traffic Exposure | 0 vehicles/day |
Bridges to Watch
Top Bridges to Watch in San Juan County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Us-191 (sr-191) over Big Mule Shoe Wash Tun. | High traffic | Good | 6,237 | 1940 |
| Us-191 (sr-191) over Kane Springs Wash | High traffic | Fair | 6,237 | 1996 |
| Us-191 (sr-191) over Mormon Tank Wash | High traffic | Fair | 6,237 | 1998 |
| Us-191 (sr-191) over Coyote Wash | High traffic | Good | 5,296 | 2001 |
| Us-191 (sr-191) over Hatch Wash | High traffic | Fair | 4,080 | 1956 |
| Us-191 (sr-191) over Peters Wash | High traffic | Fair | 3,735 | 1959 |
| Us-491 over Vega Wash | High traffic | Fair | 3,551 | 1955 |
| Us-191 (sr-191) over Recapture Res. Spillway | High traffic | Fair | 3,309 | 1985 |
| Sr-163 over Unnamed Wash | High traffic | Good | 2,683 | 1957 |
| Sr-163 over Halgaitah Wash | High traffic | Fair | 2,683 | 1957 |
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.