NB I-380 over West Otter Creek
FairLinn County, Iowa · 2.7 Mi. N of Jct. SR E34 · Structure no. 000000000605070
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 113 ft
- 3 main spans
- Daily traffic
- 12,850
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
NB I-380 over West Otter Creek is a prestressed concrete stringer/multi-beam or girder carrying NB I-380 over West Otter Creek in Linn County, Iowa. It was built in 1983, so it is 42 years old, younger 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 12,850 vehicles a day, roughly 24% of them trucks, projected to reach 12,850 by 2044. The structure is 113 ft (34.4 m) long and 43 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NB I-380 over West Otter Creek built?
It was built in 1983, making it 42 years old in 2025.
What condition is NB I-380 over West Otter Creek 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 May 2024.
How much traffic does NB I-380 over West Otter Creek carry?
About 12,850 vehicles per day (2022 count), of which roughly 24% are trucks.
How long is NB I-380 over West Otter Creek?
The structure is 113 ft (34.4 m) long with a longest span of 44 ft (13.4 m) and a deck 43 ft wide.
Who owns NB I-380 over West Otter Creek?
It is owned by the State Highway Agency.