FM over Dm River
PoorPosted for loadHumboldt County, Iowa · 092302305 · Structure no. 000000000184950
- Built
- 1905
- 120 years old, rebuilt 1982
- Condition
- Poor
- inspected November 2024
- Type
- Truss - Thru
- Steel
- Length
- 217 ft
- 1 main span
- Daily traffic
- 30
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Dm River is a steel truss - thru carrying FM over Dm River in Humboldt County, Iowa. It was built in 1905 and reconstructed in 1982, so it is 120 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 30 vehicles a day, projected to reach 30 by 2044. The structure is 217 ft (66.1 m) long and 16 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 Dm River built?
It was built in 1905, making it 120 years old in 2025. It was reconstructed in 1982.
What condition is FM over Dm 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 November 2024.
How much traffic does FM over Dm River carry?
About 30 vehicles per day (2022 count).
How long is FM over Dm River?
The structure is 217 ft (66.1 m) long with a longest span of 140 ft (42.7 m) and a deck 16 ft wide.
Who owns FM over Dm River?
It is owned by the County Highway Agency.