FM over Dd No 4
PoorWebster County, Iowa · 089271001 · Structure no. 000000000342991
- Built
- 1974
- 51 years old
- Condition
- Poor
- inspected November 2023
- Type
- Slab
- Concrete Continuous
- Length
- 78 ft
- 3 main spans
- Daily traffic
- 559
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Dd No 4 is a concrete continuous slab carrying FM over Dd No 4 in Webster 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 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 559 vehicles a day, roughly 22% of them trucks, projected to reach 559 by 2043. The structure is 78 ft (23.8 m) long and 31 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 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 FM over Dd No 4 built?
It was built in 1974, making it 51 years old in 2025.
What condition is FM over Dd No 4 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 2023.
How much traffic does FM over Dd No 4 carry?
About 559 vehicles per day (2022 count), of which roughly 22% are trucks.
How long is FM over Dd No 4?
The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 31 ft wide.
Who owns FM over Dd No 4?
It is owned by the County Highway Agency.