FM over Blackhawk Creek
PoorGrundy County, Iowa · 087161304 · Structure no. 000000000164160
- Built
- 1967
- 58 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 178 ft
- 3 main spans
- Daily traffic
- 579
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Blackhawk Creek is a steel continuous stringer/multi-beam or girder carrying FM over Blackhawk Creek in Grundy County, Iowa. It was built in 1967, so it is 58 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 579 vehicles a day, roughly 12% of them trucks, projected to reach 579 by 2044. The structure is 178 ft (54.3 m) long and 30 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Blackhawk Creek built?
It was built in 1967, making it 58 years old in 2025.
What condition is FM over Blackhawk Creek 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 March 2024.
How much traffic does FM over Blackhawk Creek carry?
About 579 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is FM over Blackhawk Creek?
The structure is 178 ft (54.3 m) long with a longest span of 68 ft (20.7 m) and a deck 30 ft wide.
Who owns FM over Blackhawk Creek?
It is owned by the County Highway Agency.