FM over South River
PoorPosted for loadMadison County, Iowa · 074262604 · Structure no. 000000000231790
- Built
- 1936
- 89 years old
- Condition
- Poor
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 153 ft
- 3 main spans
- Daily traffic
- 349
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over South River is a steel continuous stringer/multi-beam or girder carrying FM over South River in Madison County, Iowa. It was built in 1936, so it is 89 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 3 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. Its operating status is: posted for load restriction.
It carries about 349 vehicles a day, roughly 8% of them trucks, projected to reach 349 by 2043. The structure is 153 ft (46.6 m) long and 21 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM over South River built?
It was built in 1936, making it 89 years old in 2025.
What condition is FM over South 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 August 2023.
How much traffic does FM over South River carry?
About 349 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is FM over South River?
The structure is 153 ft (46.6 m) long with a longest span of 58 ft (17.7 m) and a deck 21 ft wide.
Who owns FM over South River?
It is owned by the County Highway Agency.