FM over Black Hawk Creek
FairGrundy County, Iowa · 088150802 · Structure no. 000000000164631
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 128 ft
- 3 main spans
- Daily traffic
- 1,404
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Black Hawk Creek is a concrete continuous slab carrying FM over Black Hawk Creek in Grundy 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 1,404 vehicles a day, roughly 13% of them trucks, projected to reach 1,404 by 2044. The structure is 128 ft (39 m) long and 32 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 Black Hawk Creek built?
It was built in 1974, making it 51 years old in 2025.
What condition is FM over Black Hawk Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.
How much traffic does FM over Black Hawk Creek carry?
About 1,404 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is FM over Black Hawk Creek?
The structure is 128 ft (39 m) long with a longest span of 49 ft (14.9 m) and a deck 32 ft wide.
Who owns FM over Black Hawk Creek?
It is owned by the County Highway Agency.