L-22 over Little Sioux River
FairPlymouth County, Iowa · 092432402 · Structure no. 000000000274061
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete
- Length
- 100 ft
- 3 main spans
- Daily traffic
- 139
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
L-22 over Little Sioux River is a concrete slab carrying L-22 over Little Sioux River in Plymouth County, Iowa. It was built in 1974, so it is 51 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 139 vehicles a day, roughly 16% of them trucks, projected to reach 139 by 2044. The structure is 100 ft (30.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was L-22 over Little Sioux River built?
It was built in 1974, making it 51 years old in 2025.
What condition is L-22 over Little Sioux River 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 April 2023.
How much traffic does L-22 over Little Sioux River carry?
About 139 vehicles per day (2022 count), of which roughly 16% are trucks.
How long is L-22 over Little Sioux River?
The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.
Who owns L-22 over Little Sioux River?
It is owned by the County Highway Agency.