Old Portland RD over I-80
FairDallas County, Iowa · 2.0 Mi. E of Jct. 169 · Structure no. 000000000022320
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected December 2022
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 240 ft
- 4 main spans
- Daily traffic
- 170
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Old Portland RD over I-80 is a prestressed concrete stringer/multi-beam or girder carrying Old Portland RD over I-80 in Dallas County, Iowa. It was built in 1966, so it is 59 years old, older than the Iowa average of 45.5 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 170 vehicles a day, projected to reach 170 by 2042. The structure is 240 ft (73.2 m) long and 32 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Portland RD over I-80 built?
It was built in 1966, making it 59 years old in 2025.
What condition is Old Portland RD over I-80 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 December 2022.
How much traffic does Old Portland RD over I-80 carry?
About 170 vehicles per day (2022 count).
How long is Old Portland RD over I-80?
The structure is 240 ft (73.2 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.
Who owns Old Portland RD over I-80?
It is owned by the State Highway Agency.