FM over Little Sioux River
PoorDickinson County, Iowa · 098371001 · Structure no. 000000000144740
- Built
- 1979
- 46 years old
- Condition
- Poor
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 204 ft
- 3 main spans
- Daily traffic
- 1,076
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Little Sioux River is a prestressed concrete stringer/multi-beam or girder carrying FM over Little Sioux River in Dickinson County, Iowa. It was built in 1979, so it is 46 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 1,076 vehicles a day, roughly 13% of them trucks, projected to reach 1,076 by 2043. The structure is 204 ft (62.2 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM over Little Sioux River built?
It was built in 1979, making it 46 years old in 2025.
What condition is FM over Little Sioux River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.
How much traffic does FM over Little Sioux River carry?
About 1,076 vehicles per day (2021 count), of which roughly 13% are trucks.
How long is FM over Little Sioux River?
The structure is 204 ft (62.2 m) long with a longest span of 73 ft (22.3 m) and a deck 32 ft wide.
Who owns FM over Little Sioux River?
It is owned by the County Highway Agency.