HWY 91 over Fanno Creek
FairWashington County, Oregon · At Tigard Cc · Structure no. 02533 01W 00937
- Built
- 1940
- 85 years old
- Condition
- Fair
- inspected February 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 124 ft
- 3 main spans
- Daily traffic
- 35,507
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 91 over Fanno Creek is a concrete continuous tee beam carrying HWY 91 over Fanno Creek in Washington County, Oregon. It was built in 1940, so it is 85 years old, older 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 35,507 vehicles a day, roughly 3% of them trucks, projected to reach 40,200 by 2042. The structure is 124 ft (37.8 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 91 over Fanno Creek built?
It was built in 1940, making it 85 years old in 2025.
What condition is HWY 91 over Fanno Creek 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 February 2024.
How much traffic does HWY 91 over Fanno Creek carry?
About 35,507 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is HWY 91 over Fanno Creek?
The structure is 124 ft (37.8 m) long with a longest span of 50 ft (15.2 m) and a deck 66 ft wide.
Who owns HWY 91 over Fanno Creek?
It is owned by the State Highway Agency.