Yamhill County Bridge Report Card
Yamhill County scores 60 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Yamhill County, Oregon
Yamhill County has 150 bridges in the National Bridge Inventory, with 13 rated poor and 41 rated scour-critical. Its poor-condition share of 8.7% is above the 5.1% statewide average. Poor-condition bridges carry about 10,616 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Yamhill County a Bridge Condition Exposure Score of 60/100 (D). The county has 150 bridges in the National Bridge Inventory, including 13 in poor condition and 41 rated scour-critical. Poor-condition bridges carry about 10,616 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 | 8.7% | 17.3 |
| Poor-condition traffic exposure | 25 | 1.7% of measured traffic | 1.2 |
| Scour-critical bridge share | 20 | 27.3% | 20.0 |
| Average age vs national baseline | 10 | 51 years vs 48 nationally | 1.1 |
| Traffic-data completeness | 5 | 642,207 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 | 8.7% |
| State Poor-Condition Share | 5.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 27.3% |
| Average Bridge Age | 51 years |
| Poor-Condition Traffic Exposure | 10,616 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Yamhill County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Hendricks Road over Hawn Creek | Poor condition + traffic exposure | Poor | 3,288 | 1964 |
| Old Moores Valley over Haskins Creek | Poor condition + traffic exposure | Poor | 284 | 1967 |
| Allen RD over Small Stream | Poor condition + traffic exposure | Poor | 99 | 1952 |
| Gopher Valley RD over Deer Creek | Poor condition + traffic exposure | Poor | 64 | 1968 |
| Blackwell Park RD over Willamina Creek | Poor condition + traffic exposure | Poor | 31 | 1965 |
| HWY 29 over Yamhill Creek | Poor condition + traffic exposure | Poor | 5,429 | 1958 |
| Webfoot Road over W. Fk. Palmer Creek | Poor condition + traffic exposure | Poor | 566 | 1959 |
| Berry Creek Road over Berry Creek | Poor condition + traffic exposure | Poor | 264 | 1966 |
| Grand Island Loop over Mosquito Creek | Poor condition + traffic exposure | Poor | 219 | 1961 |
| Loganberry Lane over Small Stream | Poor condition + traffic exposure | Poor | 219 | 1969 |
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.