Or 99W (hwy 91) SB over North Yamhill River
FairYamhill County, Oregon · 002 MI N Mcminnville · Structure no. 00441 01W 03499
- Built
- 1921
- 104 years old
- Condition
- Fair
- inspected April 2024
- Type
- Truss - Deck
- Steel
- Length
- 360 ft
- 1 main span
- Daily traffic
- 10,350
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Or 99W (hwy 91) SB over North Yamhill River is a steel truss - deck carrying Or 99W (hwy 91) SB over North Yamhill River in Yamhill County, Oregon. It was built in 1921, so it is 104 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 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 10,350 vehicles a day, roughly 5% of them trucks, projected to reach 12,750 by 2042. The structure is 360 ft (109.7 m) long and 27 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Or 99W (hwy 91) SB over North Yamhill River built?
It was built in 1921, making it 104 years old in 2025.
What condition is Or 99W (hwy 91) SB over North Yamhill 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 April 2024.
How much traffic does Or 99W (hwy 91) SB over North Yamhill River carry?
About 10,350 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Or 99W (hwy 91) SB over North Yamhill River?
The structure is 360 ft (109.7 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.
Who owns Or 99W (hwy 91) SB over North Yamhill River?
It is owned by the State Highway Agency.