HWY 001 over Iowa Street Viaduct
GoodMultnomah County, Oregon · 1.7 MI N Multnomah Blvd · Structure no. 20788 001 29824
- Built
- 2014
- 11 years old
- Condition
- Good
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 440 ft
- 3 main spans
- Daily traffic
- 125,003
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 001 over Iowa Street Viaduct is a prestressed concrete stringer/multi-beam or girder carrying HWY 001 over Iowa Street Viaduct in Multnomah County, Oregon. It was built in 2014, so it is 11 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 125,003 vehicles a day, roughly 10% of them trucks, projected to reach 133,900 by 2042. The structure is 440 ft (134.1 m) long and 51 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 001 over Iowa Street Viaduct built?
It was built in 2014, making it 11 years old in 2025.
What condition is HWY 001 over Iowa Street 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 January 2024.
How much traffic does HWY 001 over Iowa Street Viaduct carry?
About 125,003 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is HWY 001 over Iowa Street Viaduct?
The structure is 440 ft (134.1 m) long and a deck 51 ft wide.
Who owns HWY 001 over Iowa Street Viaduct?
It is owned by the State Highway Agency.