Opal Lane over Irrigation Canal
Jefferson County, Oregon · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Opal Lane over Irrigation Canal in Jefferson County, Oregon, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1952 and reconstructed in 1983, making it 73 years old at the 2025 inventory.
- It carries about 14 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 7 of the 80 inventoried bridges in Jefferson County rated poor (8.8%); 7 (8.8%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: substructure 6 to 5.
- Its most recent inspection on record is dated November 2024, on a 12-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 → (44.43387, -121.17168)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 5 | Fair condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 74 ft |
| Location | 0.9 Mi E of Culver Hwy |
| NBI structure number | 31C42 000 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Jefferson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 97 (hwy 004) over Crooked R Canyon High Br | 2000 | 17,957 | Good |
| US 97 (hwy 004) over Ochoco Main Canal N Unit | 2005 | 13,479 | Good |
| US 97 (hwy 004) over Ochoco Main Canal N Unit | 2005 | 12,575 | Good |
| US 97 (hwy 004)NB over Willow Creek | 2006 | 11,568 | Good |
| US 26 (Hwy 053) over BNSF | 2005 | 11,556 | Good |
| US 97 (hwy 004)SB over Willow Creek | 1966 | 10,393 | Fair |
All bridges nearby: Jefferson County, OR bridge conditions · every bridge in Jefferson County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.