Upper N Fork Road over North Fork Siuslaw River
FairLane County, Oregon · 125 MI NE Florence · Structure no. 39C538508400056
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 137 ft
- 1 main span
- Daily traffic
- 229
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Upper N Fork Road over North Fork Siuslaw River is a prestressed concrete box beam or girders - multiple carrying Upper N Fork Road over North Fork Siuslaw River in Lane County, Oregon. It was built in 1978, so it is 47 years old, younger than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 229 vehicles a day, roughly 2% of them trucks, projected to reach 264 by 2025. The structure is 137 ft (41.8 m) long and 32 ft wide. If it were closed, the detour would be 44.7 mi (72 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Upper N Fork Road over North Fork Siuslaw River built?
It was built in 1978, making it 47 years old in 2025.
What condition is Upper N Fork Road over North Fork Siuslaw River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.
How much traffic does Upper N Fork Road over North Fork Siuslaw River carry?
About 229 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is Upper N Fork Road over North Fork Siuslaw River?
The structure is 137 ft (41.8 m) long with a longest span of 90 ft (27.4 m) and a deck 32 ft wide.
Who owns Upper N Fork Road over North Fork Siuslaw River?
It is owned by the County Highway Agency.