Millport Slough RD over Johnson CR
GoodClackamas County, Oregon · 0020 MI E SE 17th Ave · Structure no. 05C06 000 00000
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected May 2023
- Type
- Slab
- Prestressed Concrete
- Length
- 70 ft
- 2 main spans
- Daily traffic
- 252
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Millport Slough RD over Johnson CR is a prestressed concrete slab carrying Millport Slough RD over Johnson CR in Clackamas County, Oregon. It was built in 1963, so it is 62 years old, older 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 252 vehicles a day, roughly 1% of them trucks, projected to reach 278 by 2025. The structure is 70 ft (21.3 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 7 Good | Some minor problems. |
| 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 Millport Slough RD over Johnson CR built?
It was built in 1963, making it 62 years old in 2025.
What condition is Millport Slough RD over Johnson CR 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 Millport Slough RD over Johnson CR carry?
About 252 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is Millport Slough RD over Johnson CR?
The structure is 70 ft (21.3 m) long with a longest span of 35 ft (10.7 m) and a deck 38 ft wide.
Who owns Millport Slough RD over Johnson CR?
It is owned by the City or Municipal Highway Agency.