FM over Dd #71
PoorPosted for loadSac County, Iowa · 087360701 · Structure no. 000000000299960
- Built
- 1920
- 105 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 42 ft
- 1 main span
- Daily traffic
- 20
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Dd #71 is a steel stringer/multi-beam or girder carrying FM over Dd #71 in Sac County, Iowa. It was built in 1920, so it is 105 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 20 vehicles a day, projected to reach 20 by 2044. The structure is 42 ft (12.8 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 Dd #71 built?
It was built in 1920, making it 105 years old in 2025.
What condition is FM over Dd #71 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 2024.
How much traffic does FM over Dd #71 carry?
About 20 vehicles per day (2022 count).
How long is FM over Dd #71?
The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 18 ft wide.
Who owns FM over Dd #71?
It is owned by the County Highway Agency.