Jefferson County Bridge Report Card
Jefferson County scores 67 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Jefferson County, Oregon
Jefferson County has 80 bridges in the National Bridge Inventory, with 7 rated poor and 6 rated scour-critical. Its poor-condition share of 8.8% is above the 5.1% statewide average. Poor-condition bridges carry about 867 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Jefferson County a Bridge Condition Exposure Score of 67/100 (D). The county has 80 bridges in the National Bridge Inventory, including 7 in poor condition and 6 rated scour-critical. Poor-condition bridges carry about 867 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 | 8.8% | 17.5 |
| Poor-condition traffic exposure | 25 | 0.6% of measured traffic | 0.5 |
| Scour-critical bridge share | 20 | 7.5% | 15.0 |
| Average age vs national baseline | 10 | 45 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 139,575 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 | 8.8% |
| State Poor-Condition Share | 5.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 7.5% |
| Average Bridge Age | 45 years |
| Poor-Condition Traffic Exposure | 867 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Jefferson County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Bear DR over Irrigation Canal | Poor condition + traffic exposure | Poor | 260 | 1952 |
| Camp Sherman Road over Lake Creek | Poor condition + traffic exposure | Poor | 254 | 1969 |
| Eureka Lane over Irrigation Canal | Poor condition + traffic exposure | Poor | 235 | 1952 |
| Norris Lane over Irrigation Canal | Poor condition + traffic exposure | Poor | 44 | 1950 |
| Access Road over Jack Creek | Poor condition + traffic exposure | Poor | 40 | 1946 |
| Usfs #14 over Metolius River | Poor condition + traffic exposure | Poor | 20 | 1961 |
| Opal Lane over Irrigation Canal | Poor condition + traffic exposure | Poor | 14 | 1952 |
| US 26 (hwy 053) over Deschutes River | Scour-critical foundation rating | Fair | 7,631 | 1934 |
| Old HWY 97 over Hay Creek | Scour-critical foundation rating | Fair | 2,116 | 1923 |
| 7th ST Madras over Willow Creek EB | Scour-critical foundation rating | Fair | 330 | 1970 |
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.