Bridge conditions in Columbia County, Oregon
128 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 128 bridges in Columbia County: 42 rated good, 74 fair, and 12 poor.
- 12 of the 128 bridges in Columbia County, Oregon, are rated in poor condition (9.4%) in the 2025 National Bridge Inventory, as of .
- 42 bridges (32.8%) are rated good and 74 (57.8%) fair.
- The median Columbia County bridge was built in 1980.
- The busiest poor-rated bridge is OR 47 (Hwy 102) over Rock Creek (built 1930), carrying about 4,450 vehicles a day.
Good 32.8% · Fair 57.8% · Poor 9.4% of 128 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 47 (Hwy 102) over Rock Creek | 1930 | 4,450 | Poor |
| Or 47 (hwy 102) over Nehalem River | 1938 | 2,938 | Poor |
| Scappoose-vernonia over S Fk Scappoose Creek | 1957 | 2,926 | Poor |
| Watts Road over S Fk Scappoose Creek | 1962 | 1,667 | Poor |
| Mayger Road over Beaver Creek | 1961 | 1,339 | Poor |
| Apiary Road over Oak Ranch Creek | 2009 | 1,200 | Poor |
| Scappoose-vernonia over East Fork Nehalem River | 1952 | 991 | Poor |
| C Street West over Nice Creek | 1911 | 732 | Poor |
| Scappoose-vernonia over Crown Z Road | 1963 | 562 | Poor |
| Fishhawk Creek Rd over Nehalem River | 1963 | 451 | Poor |
| Clatskanie Dist Rd over Clatskanie Slough | 1979 | 382 | Poor |
| Park Street over Clatskanie River | 1986 | 277 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 30 (hwy 92) over N Fork Scappoose River | 1980 | 31,178 | Fair |
| US 30 (Hwy 92) over S Fork Scappoose River | 1980 | 31,178 | Fair |
| US 30 (hwy 92) over Honeyman Creek | 1919 | 30,567 | Fair |
| US 30 (Hwy 92) over McNulty Creek | 1996 | 23,995 | Fair |
| Hwy 92 Conn over Columbia River | 1929 | 21,169 | Fair |
| US 30 (Hwy 92) over Milton Creek | 1996 | 20,849 | Fair |
| Longview Brdg Conn over OR 30 Hwy 92 | 1969 | 14,324 | Good |
| OR 30 Hwy 92 over Swedetown Cnty Rd. | 1954 | 11,433 | Fair |
| Hwy 2W Hwy 92 over Beaver Creek | 1968 | 11,088 | Fair |
| US 30 (Hwy 92) over Lost Creek | 1953 | 10,990 | Fair |
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.