Bridge conditions in Polk County, Oregon
162 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 162 bridges in Polk County: 37 rated good, 113 fair, and 12 poor.
- 12 of the 162 bridges in Polk County, Oregon, are rated in poor condition (7.4%) in the 2025 National Bridge Inventory, as of .
- 37 bridges (22.8%) are rated good and 113 (69.8%) fair.
- The median Polk County bridge was built in 1975.
- The busiest poor-rated bridge is OR 99W (Hwy 91) over North Fork Ash Creek (built 1954), carrying about 14,149 vehicles a day.
Good 22.8% · Fair 69.8% · Poor 7.4% of 162 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| OR 99W (Hwy 91) over North Fork Ash Creek | 1954 | 14,149 | Poor |
| Monmouth Cut Off over N Fk Ash Creek | 1979 | 4,473 | Poor |
| OR 223 (Hwy 191) over Fern Creek | 1953 | 3,545 | Poor |
| Godsey Road over N Fk Ash Creek | 1960 | 1,112 | Poor |
| OR 223 (Hwy 191) over McTimmonds Creek | 1967 | 879 | Poor |
| Winslow Way NW over Salemtowne Golf Cart Pat | 1967 | 857 | Poor |
| De Jong Road over Trib of S Yamhill River | 1964 | 469 | Poor |
| Gage Road over Ritner Creek | 1993 | 219 | Poor |
| Gage Road over Sheythe Creek | 1993 | 219 | Poor |
| Gage Road over Clayton Creek | 1993 | 219 | Poor |
| Farm Entrance over Drainage Channel | 1956 | 60 | Poor |
| "A" St over Plum Creek | 1940 | 15 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Or 22 (HWY30AZ) E over Hwy 150 Conn. & Park Rd | 1953 | 45,083 | Fair |
| Or 22 (hwy 30) over Boat Moorage Access | 1963 | 44,753 | Fair |
| Or 22 (hwy 30) over OR 221 (HWY 150) Conn | 1963 | 29,957 | Fair |
| OR 22 (Hwy 30) over Mud Slough | 1973 | 28,015 | Good |
| Or 22 (hwy 30) Con over Wallace Marine Park | 1953 | 22,964 | Fair |
| OR 22 (Hwy 30) over W&p RR | 1973 | 22,774 | Good |
| Or 22 (hwy 30) over Or 221 (hwy 150) Conn | 1963 | 22,376 | Fair |
| Or 22 (hwy 30) WB over OR 221 (HWY 150) Conn | 1952 | 22,196 | Fair |
| OR 18 (Hwy 39) over South Yamhill River | 1992 | 17,452 | Good |
| OR 18 (Hwy 39) over Casino Entrance Road | 1996 | 17,452 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Oregon: Oregon bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.