SR L 31 over I-29
GoodFremont County, Iowa · At Jct. SR J-10 · Structure no. 000000000025600
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 263 ft
- 4 main spans
- Daily traffic
- 777
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
SR L 31 over I-29 is a prestressed concrete stringer/multi-beam or girder carrying SR L 31 over I-29 in Fremont County, Iowa. It was built in 1970, so it is 55 years old, older than the Iowa average of 45.5 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 777 vehicles a day, roughly 8% of them trucks, projected to reach 777 by 2042. The structure is 263 ft (80.2 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR L 31 over I-29 built?
It was built in 1970, making it 55 years old in 2025.
What condition is SR L 31 over I-29 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 April 2023.
How much traffic does SR L 31 over I-29 carry?
About 777 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is SR L 31 over I-29?
The structure is 263 ft (80.2 m) long with a longest span of 92 ft (28 m) and a deck 35 ft wide.
Who owns SR L 31 over I-29?
It is owned by the State Highway Agency.