Or 138 (hwy 138) over N Umpqua Rv (lone Rock)
Douglas County, Oregon · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Or 138 (hwy 138) over N Umpqua Rv (lone Rock) in Douglas County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1954, making it 71 years old at the 2025 inventory.
- It carries about 1,942 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 440 of the 703 inventoried bridges in Douglas County rated fair (62.6%); 17 (2.4%) are rated poor.
- Its traffic status in the 2025 inventory is posted for another load-capacity restriction (speed, number of vehicles on the bridge, etc.) (NBI item 41).
- It was rated poor in the 2024 inventory and is now fair (deck 4 to 6, superstructure 6 to 7, substructure 5 to 6).
- Status change: newly posted for load since 2024.
- Its most recent inspection on record is dated July 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (43.3094, -123.07365)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 6 | Satisfactory condition |
| Superstructure | 6 | 7 | Good condition |
| Substructure | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel through truss |
| Length | about 514 ft |
| Location | 17.9 Mi E of Hwy 99 |
| NBI structure number | 02496 073 01786 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for another load-capacity restriction (speed, number of vehicles on the bridge, etc.) |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Douglas County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-5 (hwy 001) over I-5 @ Bellows St | 1976 | 46,894 | Fair |
| I-5 (hwy 001) over I-5 @ Harvard Ave | 1976 | 46,894 | Fair |
| I-5 (hwy 001) over I-5 @ Portland Ave | 1954 | 42,268 | Fair |
| I-5 (hwy 001) over I-5 @ Speedway Rd | 1955 | 41,824 | Fair |
| I-5 (hwy 001) over I-5 @ Mclain Rd | 2009 | 41,701 | Fair |
| I-5 (hwy 001) over Creek | 1954 | 29,858 | Fair |
All bridges nearby: Douglas County, OR bridge conditions · every bridge in Douglas County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.