325th ST over I-29
FairMonona County, Iowa · 3.1 Mi. S of SR E60 · Structure no. 000000000037250
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 218 ft
- 4 main spans
- Daily traffic
- 34
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
325th ST over I-29 is a prestressed concrete stringer/multi-beam or girder carrying 325th ST over I-29 in Monona County, Iowa. It was built in 1967, so it is 58 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 34 vehicles a day, roughly 18% of them trucks, projected to reach 34 by 2042. The structure is 218 ft (66.4 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 325th ST over I-29 built?
It was built in 1967, making it 58 years old in 2025.
What condition is 325th ST over I-29 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 2023.
How much traffic does 325th ST over I-29 carry?
About 34 vehicles per day (2022 count), of which roughly 18% are trucks.
How long is 325th ST over I-29?
The structure is 218 ft (66.4 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.
Who owns 325th ST over I-29?
It is owned by the State Highway Agency.