SW Sam Jackson over Semi-Viaduct
FairMultnomah County, Oregon · Ohsu · Structure no. 20667 000 00000
- Built
- 2009
- 16 years old
- Condition
- Fair
- inspected September 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 253 ft
- 7 main spans
- Daily traffic
- 1,259
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
SW Sam Jackson over Semi-Viaduct is a prestressed concrete slab carrying SW Sam Jackson over Semi-Viaduct in Multnomah County, Oregon. It was built in 2009, so it is 16 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 6 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 1,259 vehicles a day, roughly 1% of them trucks, projected to reach 1,389 by 2025. The structure is 253 ft (77.1 m) long and 24 ft wide.
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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SW Sam Jackson over Semi-Viaduct built?
It was built in 2009, making it 16 years old in 2025.
What condition is SW Sam Jackson over Semi-Viaduct 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 2024.
How much traffic does SW Sam Jackson over Semi-Viaduct carry?
About 1,259 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is SW Sam Jackson over Semi-Viaduct?
The structure is 253 ft (77.1 m) long with a longest span of 36 ft (11 m) and a deck 24 ft wide.
Who owns SW Sam Jackson over Semi-Viaduct?
It is owned by the City or Municipal Highway Agency.