Or 58 (hwy 018) over Half Viaduct
GoodLane County, Oregon · 058 MI W Lane Klamath LN · Structure no. 21570 018 05632
- Built
- 2015
- 10 years old
- Condition
- Good
- inspected August 2023
- Type
- Slab
- Prestressed Concrete
- Length
- 148 ft
- 1 main span
- Daily traffic
- 1,275
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Or 58 (hwy 018) over Half Viaduct is a prestressed concrete slab carrying Or 58 (hwy 018) over Half Viaduct in Lane County, Oregon. It was built in 2015, so it is 10 years old, younger than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,275 vehicles a day, roughly 36% of them trucks, projected to reach 1,350 by 2042. The structure is 148 ft (45 m) long and 13 ft wide. If it were closed, the detour would be 90.7 mi (146 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Or 58 (hwy 018) over Half Viaduct built?
It was built in 2015, making it 10 years old in 2025.
What condition is Or 58 (hwy 018) over Half Viaduct in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does Or 58 (hwy 018) over Half Viaduct carry?
About 1,275 vehicles per day (2022 count), of which roughly 36% are trucks.
How long is Or 58 (hwy 018) over Half Viaduct?
The structure is 148 ft (45 m) long with a longest span of 50 ft (15.2 m) and a deck 13 ft wide.
Who owns Or 58 (hwy 018) over Half Viaduct?
It is owned by the State Highway Agency.