OR 47 (Hwy 102) over Rock Creek
Columbia County, Oregon · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- OR 47 (Hwy 102) over Rock Creek in Columbia County, Oregon, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1930, making it 95 years old at the 2025 inventory.
- It carries about 4,450 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 12 of the 128 inventoried bridges in Columbia County rated poor (9.4%); 12 (9.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now poor (deck 7 to 6, substructure 5 to 4, superstructure 5 to 6).
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (45.85873, -123.19212)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 5 | 6 | Satisfactory condition |
| Substructure | 5 | 4 | Poor condition |
Bridge details
| Structure | Continuous concrete tee beam |
| Length | about 140 ft |
| Location | In Vernonia |
| NBI structure number | 01508 102 06227 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Columbia 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 |
All bridges nearby: Columbia County, OR bridge conditions · every bridge in Columbia County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.