Road over Marion CR
Linn County, Oregon · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Road over Marion CR in Linn County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1980, making it 45 years old at the 2025 inventory.
- It carries about 50 vehicles a day.
- It is one of 363 of the 564 inventoried bridges in Linn County rated fair (64.4%); 95 (16.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (44.58201, -121.91751)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 59 ft |
| Location | No Data Entered |
| NBI structure number | 061804000001386 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Linn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Dever-Conner Road over I-5 (Hwy 1) | 1958 | 66,723 | Fair |
| I-5 (hwy 1) over Truax Creek | 1947 | 66,382 | Fair |
| I-5 (hwy 1) NB over Knox Butte Road | 1958 | 34,103 | Fair |
| I-5 (hwy 1) NB over Or 99E (hwy 058) NB | 1958 | 34,103 | Fair |
| I-5 (hwy 1) SB over Knox Butte Road | 1958 | 34,103 | Fair |
| I-5 (hwy 1) SB over Or 99E (hwy 58) NB | 1958 | 34,103 | Fair |
All bridges nearby: Linn County, OR bridge conditions · every bridge in Linn County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.