Or 99W (hwy 91) over Marys River
GoodBenton County, Oregon · In Corvallis · Structure no. 16875 01WR08409
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 707 ft
- 7 main spans
- Daily traffic
- 2,643
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Or 99W (hwy 91) over Marys River is a prestressed concrete stringer/multi-beam or girder carrying Or 99W (hwy 91) over Marys River in Benton County, Oregon. It was built in 1991, so it is 34 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 2,643 vehicles a day, roughly 3% of them trucks, projected to reach 2,600 by 2030. The structure is 707 ft (215.6 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Or 99W (hwy 91) over Marys River built?
It was built in 1991, making it 34 years old in 2025.
What condition is Or 99W (hwy 91) over Marys River 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 May 2023.
How much traffic does Or 99W (hwy 91) over Marys River carry?
About 2,643 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is Or 99W (hwy 91) over Marys River?
The structure is 707 ft (215.6 m) long with a longest span of 120 ft (36.6 m) and a deck 29 ft wide.
Who owns Or 99W (hwy 91) over Marys River?
It is owned by the State Highway Agency.