Canby-Marquam HWY over Molalla River
FairClackamas County, Oregon · 005 Mile So of Canby · Structure no. 01515A610101250
- Built
- 1930
- 95 years old, rebuilt 1980
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 315 ft
- 3 main spans
- Daily traffic
- 2,038
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Canby-Marquam HWY over Molalla River is a prestressed concrete stringer/multi-beam or girder carrying Canby-Marquam HWY over Molalla River in Clackamas County, Oregon. It was built in 1930 and reconstructed in 1980, so it is 95 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 2,038 vehicles a day, roughly 16% of them trucks, projected to reach 2,182 by 2025. The structure is 315 ft (96 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| 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 Canby-Marquam HWY over Molalla River built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1980.
What condition is Canby-Marquam HWY over Molalla 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 2023.
How much traffic does Canby-Marquam HWY over Molalla River carry?
About 2,038 vehicles per day (2020 count), of which roughly 16% are trucks.
How long is Canby-Marquam HWY over Molalla River?
The structure is 315 ft (96 m) long with a longest span of 130 ft (39.6 m) and a deck 39 ft wide.
Who owns Canby-Marquam HWY over Molalla River?
It is owned by the County Highway Agency.