FM over Blackhawk Creek Branch
PoorGrundy County, Iowa · 087171302 · Structure no. 000000000164370
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 44 ft
- 1 main span
- Daily traffic
- 275
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Blackhawk Creek Branch is a steel stringer/multi-beam or girder carrying FM over Blackhawk Creek Branch in Grundy County, Iowa. It was built in 1965, so it is 60 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.
It carries about 275 vehicles a day, roughly 23% of them trucks, projected to reach 275 by 2044. The structure is 44 ft (13.4 m) long and 30 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Blackhawk Creek Branch built?
It was built in 1965, making it 60 years old in 2025.
What condition is FM over Blackhawk Creek Branch 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 April 2024.
How much traffic does FM over Blackhawk Creek Branch carry?
About 275 vehicles per day (2022 count), of which roughly 23% are trucks.
How long is FM over Blackhawk Creek Branch?
The structure is 44 ft (13.4 m) long with a longest span of 42 ft (12.8 m) and a deck 30 ft wide.
Who owns FM over Blackhawk Creek Branch?
It is owned by the County Highway Agency.