8th ST NE over I-380
FairLinn County, Iowa · 1.1 Mi. N Jct. Ia 922 · Structure no. 000000000603860
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 268 ft
- 4 main spans
- Daily traffic
- 4,410
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
8th ST NE over I-380 is a prestressed concrete stringer/multi-beam or girder carrying 8th ST NE over I-380 in Linn County, Iowa. It was built in 1972, so it is 53 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 4,410 vehicles a day, roughly 10% of them trucks, projected to reach 4,410 by 2044. The structure is 268 ft (81.7 m) long and 33 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 8th ST NE over I-380 built?
It was built in 1972, making it 53 years old in 2025.
What condition is 8th ST NE over I-380 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 November 2024.
How much traffic does 8th ST NE over I-380 carry?
About 4,410 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is 8th ST NE over I-380?
The structure is 268 ft (81.7 m) long with a longest span of 97 ft (29.6 m) and a deck 33 ft wide.
Who owns 8th ST NE over I-380?
It is owned by the State Highway Agency.